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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Buletin Agrohorti Jurnal Fitopatologi Indonesia Jurnal Hortikultura Indonesia (JHI) Jurnal Hortikultura Journal of Tropical Crop Science
Ketty Suketi
Departemen Agronomi Dan Hortikultura, Fakultas Pertanian, Institut Pertanian Bogor. Program Studi Agronomi Dan Hortikultura, Sekolah Pascasarjana Institut Pertanian Bogor, Jl. Meranti Kampus IPB Dramaga, Bogor 16680, Indonesia.
Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance Medicine & Pharmacology

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Kriteria Kemasakan Buah Pepaya (Carica papaya L.) IPB Callina dari Beberapa Umur Panen M. Luthfan Taris; Winarso D. Widodo; Ketty Suketi
Jurnal Hortikultura Indonesia Vol. 6 No. 3 (2015): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (168.916 KB) | DOI: 10.29244/jhi.6.3.172-176

Abstract

ABSTRACTPapaya is one of the climacteric fruit that has a short shelf life. It has high potential as a source of vitamins and minerals. This research was aimed at studying the maturity criteria of postharvest ripeness of Callina papaya fruit of several picking ages and to determine the best picking ages for postharvest handling in order to extend the shelf life. Experiment was conducted in the Research Center for Tropical Horticulture, Bogor Agricultural University (PKHT, IPB) Papaya Farm Tajur, Bogor and postharvest ripening test was conducted at Postharvest Laboratory, Department of Agronomy and Horticulture, Bogor Agricultural University in February to July 2014. Experiment consisted of 4 treatments: 115, 120, 125 and 130 days after anthesis (DAA) with 3 replications. The longest shelf life for papaya Callina was obtained by fruit picked at 115 DAA (heat unit 2010.06 0C day) with the shelf life of 8 days. Picking ages 120 DAA (heat unit 2102.13 0C day) was the best picking ages for treatment to extend the shelf life because of the good chemical quality contained and its shelf life of 7 days. The older papaya fruits ripened faster than the younger papaya fruit. Younger papaya has a lower respiration rate than the older papaya. Picking ages did not affect the physical quality but affect the chemical quality of papaya fruit at the same postharvest maturity level.Kata kunci: Callina, chemical quality, physical quality, shelf life ABSTRAK Pepaya merupakan salah satu buah klimakterik yang memiliki daya simpan pendek, tetapi memiliki potensi yang tinggi sebagai sumber vitamin dan mineral. Penelitian ini bertujuan untuk mempelajari kriteria kematangan pascapanen buah pepaya Callina dari beberapa umur panen dan menentukan saat panen terbaik untuk penanganan pascapanen dalam rangka memperpanjang masa simpan. Buah untuk percobaan diperoleh dari kebun pepaya Pusat Kajian Hortikultura Tropika, Institut Pertanian Bogor (PKHT, IPB) Tajur, Bogor dan pengujian kematangan pascapanen dilakukan di Laboratorium Pascapanen, Departemen Agronomi dan Hortikultura, Institut Pertanian Bogor pada bulan Februari - Juli 2014. Percobaan terdiri atas 4 perlakuan: 115, 120, 125 dan 130 hari setelah antesis (HSA) dengan 3 ulangan. Umur simpan terlama pepaya Callina diperoleh pada umur panen 115 HSA (satuan panas sebesar 2010.06 0C hari) dengan umur simpan 8 hari. Umur panen 120 HSA (satuan panas sebesar 2102.13 0C hari) merupakan umur panen terbaik untuk perlakuan memperpanjang umur simpan karena mutu kimia baik dengan umur simpan 7 hari. Buah pepaya yang dipanen tua lebih cepat masak dibandingkan dengan buah pepaya yang dipanen muda. Pepaya yang dipanen muda memiliki laju respirasi yang lebih rendah dibandingkan dengan pepaya yang dipanen tua. Umur panen tidak mempengaruhi mutu fisik tetapi mempengaruhi mutu kimia buah pepaya pada tingkat kematangan pascapanen yang sama.Kata kunci: Callina, mutu fisik, mutu kimia, umur simpan
Produksi Biomassa dan Minyak Atsiri Kemangi (Ocimum basilicum L.) pada Berbagai Dosis Pupuk Nitrogen dan Pupuk Cair Hayati Juang G. Kartika; Ketty Suketi; Nilam Mayasari
Jurnal Hortikultura Indonesia Vol. 7 No. 1 (2016): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (133.207 KB) | DOI: 10.29244/jhi.7.1.56-63

Abstract

ABSTRACTBasil (Ocimum basilicum L.) is one of essential oil producers. Essential oil price fluctuates, one of the reasons is because of inappropriate cultivation which vary the supply. The research was conducted to determine the best rate of nitrogen fertilizer and the effect of biological liquid fertilizer on the essential oil production of basil. The experiment was arranged in Randomized Complete Block Design with two factors. The first factor was three levels of nitrogen rate: 0, 22.5, and 45 kg ha-1 and the second factor was two levels of biological liquid fertilizer rate; 0 and 2 L ha-1 for three replications of each treatment. Nitrogen increased the number of branches, flowers, and leaf length variables. Nitrogen rate of 22.5 kg ha-1 gave a higher economic value on the basil of essential oil production. Biological liquid fertilizer increased the height and number of basil leaves variables, but it was not impacted the yield and essential oil of basil.Keywords: branches, distillation, fertilization, yieldABSTRAKKemangi (Ocimum basilicum L.) merupakan salah satu sumber penghasil minyak atsiri. Harga minyak atsiri yang fluktuatif, salah satunya disebabkan budidaya yang belum tepat. Penelitian ini bertujuan untuk mendapatkan dosis pupuk nitrogen terbaik dan mempelajari pengaruh pupuk cair hayati terhadap produksi minyak atsiri pada tanaman kemangi. Percobaan penelitian disusun dalam Rancangan Kelompok Lengkap Teracak terdiri dari dua faktor yaitu faktor pertama perlakuan dosis nitrogen 3 taraf; 0, 22.5, dan 45 kg ha-1 dan faktor kedua perlakuan dosis pupuk cair hayati 2 taraf; 0 dan 2 L ha-1 dalam 3 ulangan masing-masing perlakuan. Secara tunggal nitrogen meningkatkan peubah jumlah cabang sekunder, jumlah bunga dan panjang daun. Nitrogen dengan dosis 22.5 kg ha-1 memiliki nilai ekonomi lebih tinggi pada produksi minyak atsiri kemangi. Pengaruh pupuk cair hayati meningkatkan peubah tinggi dan jumlah daun kemangi. Pupuk cair hayati tidak mempengaruhi rendemen dan produksi minyak atsiri kemangi.Kata kunci: bobot, destilasi, pemupukan, rendemen
Degreening Buah Jeruk Siam (Citrus nobilis) pada Beberapa Konsentrasi dan Durasi Pemaparan Etilen Nian Rimayanti H.; Roedhy Poerwanto; Ketty Suketi
Jurnal Hortikultura Indonesia Vol. 7 No. 2 (2016): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (323.836 KB) | DOI: 10.29244/jhi.7.2.111-120

Abstract

ABSTRACTSiam tangerine peel is green when harvested. Degreening technology by ethylene can improve the citrus peel color becomes uniformly orange. Degreening is a process to break down green pigment (chlorophyll) on citrus peel chemically and form the orange color (carotene) without affecting internal quality of fruit. The purpose of this research was to determine the effect of ethylene concentration and ethylene exposure duration to bring out the color on Siam tangerine from Banyuwangi. Ethylene 0, 100, 200 ppm was injected into the box containing 2.8 kg citrus and was exposed to the cooling chamber with a temperature 18 0C for 24 hours ethylene + 48 hours without ethylene, 48 hours ethylene + 24 hour without ethylene and 72 hours ethylene. Ethylene exposure was conducted using multiple shots method. After exposure, tangerines were put at room temperature condition. Observations were conducted every two days: (a) non-destructive observation conducted using color reader to determine the color changes; (b) destructive observations for measuring chlorophyll and carotenoids content and physico-chemical changes i.e. the hardness, soluble solid content, titratable acidity and vitamin C. The results showed that the best combination was 200 ppm ethylene concentration for 48 hours ethylene exposure. This degreening technique altered the Citrus Colour Index (CCI) value from -1.60 to be 6.50, changed the tangerines into a bright orange. Degreening did not give negative impact on internal quality.Key words: carotenoid, chlorophyll, citrus color index, cooling chamber, tropical citrus         ABSTRAKWarna kulit buah jeruk siam saat dipanen umumnya hijau. Teknologi degreening menggunakan gas etilen dapat memperbaiki warna kulit jeruk tropika menjadi jingga. Degreening merupakan proses perombakan pigmen hijau (klorofil) pada kulit jeruk secara kimiawi dan membentuk warna jingga (karotenoid) tanpa mempengaruhi kualitas internal buah. Penelitian bertujuan mengkaji pengaruh konsentrasi dan durasi pemaparan etilen untuk menstimulasi pigmen jingga dan pengaruhnya terhadap sifat fisikokimia jeruk siam Banyuwangi. Degreening jeruk menggunakan etilen 0, 100, dan 200 ppm diinjeksikan ke dalam box degreening yang berisi jeruk 2.8 kg dan dipaparkan pada cooling chamber dengan suhu 18 0C selama 24, 48, dan 72 jam. Pengamatan dilakukan setiap dua hari: (a) pengamatan non-destruktif dengan menggunakan color reader untuk mengetahui perubahan warna; (b) pengamatan destruktif dengan mengukur kekerasan, kandungan klorofil dan karotenoid, Padatan Terlarut Total (PTT), Asam Tertitrasi Total (ATT) dan vitamin C untuk mengetahui perubahan fisikokimia jeruk. Hasil penelitian menunjukkan perubahan warna kulit buah mulai terjadi pada hari ke 4 setelah perlakuan degreening. Konsentrasi etilen terbaik adalah 200 ppm dengan durasi pemaparan 48 jam yaitu dapat meningkatkan kualitas warna buah jeruk siam dari hijau menjadi jingga kekuningan dan mampu mengubah nilai Citrus Colour Index (CCI) dari -1.60 (hijau) menjadi 6.50 (jingga kekuningan), tanpa pengaruh negatif terhadap kualitas fisikokimia buah.Kata kunci: cooling chamber, citrus color index, jeruk tropika, karotenoid, klorofil
Aplikasi Kalsium dan NAA untuk Mengendalikan Getah Kuning Buah Manggis (Garcinia mangostana L.) Yulinda Tanari; Darda Efendi; Roedhy Poerwanto; Didy Sopandie; Ketty Suketi
Jurnal Hortikultura Indonesia Vol. 9 No. 1 (2018): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (207.793 KB) | DOI: 10.29244/jhi.9.1.10-18

Abstract

ABSTRACTThe yellow sap is produced naturally in mangosteen organ except in the root. The yellow sap contaminated the aryl and rind if the epithelial cell walls rupture due to deficiency of calcium (Ca). Calcium is one of structural component of cell walls, whereas naphthaleneacetic acid (NAA) has its role in improving cell division and cell elongation. Interaction of Ca and NAA can improve sink strength and capacity because the newly formed cells need Ca to construct wall structure. This experiment aimed at finding out the effect of Ca and NAA applications in reducing the contamination of yellow sap in mangosteen. The experiment was conducted by using factorial random block design consisting of 2 factors and 3 replications. The first factor was Ca dosage (0 and 4.8 kg/tree), and the second factor was NAA concentration (0, 200, 400 and 600 ppm). The results showed that application of 4.8 Ca/tree and 200 ppm NAA as much as 5 ml / fruit effectively improve the content of Ca pectate in pericarp, reduced the percentage of yellow sap contamination on the fruit segment, aryl and rind to 0% and 12.3% respectively compared to control (17.8% on fruit segment, 36.8% on aryl and 56.1% on rind).Key words: aryl, Ca pectate, cell wall, middle lamela.ABSTRAKGetah kuning adalah getah yang dihasilkan secara alami pada setiap organ manggis, kecuali pada akar. Getah kuning akan keluar dan mencemari aril serta kulit jika dinding sel epitel pecah karena kekurangan kalsium (Ca). Kalsium adalah komponen dinding sel, berperan dalam struktur dan permeabilitas membran sedangkan asam naftalenasetat (NAA) berperan penting dalam meningkatkan pembelahan dan pembesaran sel. Interaksi keduanya dapat meningkatkan kapasitas sink buah karena sel yang baru terbentuk membutuhkan Ca dalam menyusun struktur dinding sel. Percobaan bertujuan untuk mengetahui pengaruh aplikasi Ca dan NAA dalam menurunkan cemaran getah kuning manggis. Percobaan menggunakan rancangan acak kelompok faktorial 2 faktor dengan 3 ulangan. Faktor ke-1 yaitu dosis Ca (0 dan 4.8 kg Ca/pohon) dan faktor ke-2 yaitu konsentrasi NAA (0, 200, 400 dan 600 ppm) dengan volume semprot 5 ml perbuah. Hasil percobaan menunjukkan bahwa aplikasi 4.8 kg Ca/pohon dengan NAA 200 ppm sebanyak 5 ml/buah efektif meningkatkan kandungan Ca pektat perikarp dan menurunkan persentase buah tercemar getah kuning menjadi 0% pada juring dan aril serta 12.3% pada kulit dibandingkan dengan perlakuan kontrol (17.8% pada juring, 36.8% pada aril dan 56.1% pada kulit buah).Kata kunci: aril, Ca pektat, dinding sel, lamela tengah
Heat Unit Optimization as Harvest Criteria on Banana “Barangan” at Five Time Anthesis Turi Handayani; Winarso Drajad Widodo; Ani Kurniawati; Ketty Suketi
Jurnal Hortikultura Indonesia Vol. 11 No. 1 (2020): Jurnal Hortikultura Indonesia
Publisher : Indonesian Society for Horticulture / Department of Agronomy and Horticulture

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jhi.11.1.24-31

Abstract

Harvest time can affect the shelf life and quality of fruit during storage, therefore, the right method is needed in accordance with harvest time. This study aimed to optimize heat units as a harvest criteria of Barangan banana and its effect on fruit quality. The study was conducted at Sukabumi, West Java PTPN VIII in October 2018 to February 2019 using a Randomized Complete Block Design with single factor and five anthesis time: anthesis 1 (October 13rd 2018), anthesis 2 (October 20th 2018), anthesis 3 (October 27th 2018), anthesis 4 (November 03rd 2018), anthesis 5 (November 10th 2018). The results showed Barangan banana was harvested at a minimum heat unit of 1 234.50±2.76 0C degree days with a harvest time of 72-73 days and a shelf life of 16-17 days and can be used as a harvesting criteria. Different time of anthesis did not affect to harvested fruit size, shelf life, weight loss, physical quality and chemical quality of fruit. Keywords: fruit quality, maturity, shelf life, temperature, weight loss
Pelengkungan Cabang dan Pemupukan Jeruk Keprok Borneo Prima pada Periode Transisi di Lahan Rawa Kabupaten Paser Kalimantan Timur Muhamad Noor Azizu; Roedhy Poerwanto; M. Rahmad Suhartanto; Ketty Suketi
Jurnal Hortikultura Vol 26, No 1 (2016): Juni 2016
Publisher : Indonesian Center for Horticulture Research and Development

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jhort.v26n1.2016.p81-88

Abstract

(Bending and Fertilization in Transition Period of Mandarin Citrus cv. Borneo Prima in Wetlands Paser Regency East Kalimantan)Jeruk keprok Borneo Prima (Citrus reticulata cv. Borneo Prima) merupakan komoditas lokal unggulan yang perlu dikembangkan sebagai upaya untuk mengurangi impor jeruk. Tanaman jeruk keprok Borneo Prima telah berumur 5 tahun, namun belum memasuki periode berbunga dan berbuah. Hal ini diduga karena kondisi lingkungan dan teknik budidaya yang belum sesuai. Tujuan penelitian ini ialah untuk mendapatkan teknik pelengkungan cabang dan dosis pupuk kandang yang tepat jeruk keprok Borneo Prima pada periode transisi di lahan rawa. Penelitian dilaksanakan di kebun jeruk petani Desa Padang Pengrapat, Kecamatan Tanah Grogot, Kabupaten Paser, Kalimantan Timur, di lahan rawa pada bulan Oktober 2013 sampai dengan Maret 2014, dengan rancangan acak kelompok faktorial dan tiga ulangan. Faktor pertama ialah pelengkungan cabang dengan dua taraf, yaitu tidak dilengkungkan dan dilengkungkan. Faktor kedua ialah dosis pupuk kandang dengan empat taraf, yaitu 0, 40, 60, dan 80 kg/tanaman. Hasil percobaan menunjukkan bahwa pelengkungan cabang dapat menyebabkan tanaman jeruk keprok Borneo Prima yang berumur 5 tahun menjadi berbunga dan berbuah, sedangkan yang tidak dilengkungkan cabangnya tidak berbunga dan tidak berbuah. Selain itu pelengkungan cabang meningkatkan pertumbuhan vegetatif (jumlah tunas baru, total panjang tunas baru per pohon, dan total daun baru per pohon). Pemberian pupuk kandang sampai dengan 80 kg/tanaman pada periode transisi belum dapat meningkatkan pertumbuhan vegetatif dan generatif (jumlah bunga per cabang dan jumlah buah per cabang) sampai dengan 90 hari setelah perlakuan. Tidak terdapat interaksi antara pemberian pupuk kandang dan pelengkungan cabang terhadap pertumbuhan vegetatif dan generatif. Bunga pertama muncul dari cabang atau tunas yang terletak di bagian dalam tajuk lalu diikuti tajuk yang terletak di luar. Untuk membungakan tanaman jeruk keprok Borneo Prima yang telah memasuki periode transisi atau pada periode transisi dapat dilakukan pelengkungan cabang.KeywordsJuvenil; Lahan rawa; Pupuk kandang; JerukAbstractMandarin citrus cv. Borneo Prima (Citrus reticulata cv. Borneo Prima) is superior local variety that needs to be developed in order to reduce citrus import. This citrus are 5 years old at wetlands in Paser East Kalimantan, but the citrus crop has not entered a fruitful period. This is allegedly due to environmental conditions and cultivation techniques are not appropriate. The purpose of this research was to find out the bending technology and best manure rate fertilization on transition period of mandarin citrus cv. Borneo Prima at wetlands.The experiment was conducted from October 2013 to March 2014 in the citrus farm orchard in Village of Padang Pengrapat, Tanah Grogot, Paser, East Kalimantan. The research used randomized block design with three replication. The first factor is bending (without bending and bending) and the second factor is manure rate (0, 40, 60, and 80 kg/plant). The results showed that bending can cause into flowering and fruiting mandarin citrus plant cv. Borneo Prima 5 year old, whereas that is without bending branches not flowering and not fruiting, in addition to the bending branches increase vegetative growth (number of new shoots, the total length of new shoots per plant, and total new leaves per plant). Manure up to 80 kg/plant in the period of transition has not been able to increase the vegetative and generative growth (number of flowers per branch and the number of fruits per branch) to 90 days after treatment.There is no interaction effect between bending and manure rate for vegetative and generative growth mandarin citrus cv. Borneo Prima. The first flowers appear from the branches or shoots located inside the canopy and canopy followed that outside located. Lend at interest mandarin citrus plant cv. Borneo Prima which has entered a transition period or in the period of transition can be done bending branches.
Respon Tanaman Cabai Rawit (Capsicum frustescens L.) pada Sistem Irigasi Tetes Terhadap Aplikasi Nanosilika lewat Daun Jian Ayu Pratiwi; Anas Dinurrohman Susila; Ketty Suketi
Buletin Agrohorti Vol. 10 No. 3 (2022): Buletin Agrohorti
Publisher : Departemen Agronomi dan Hortikultura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/agrob.v10i3.46447

Abstract

Cabai rawit merupakan salah satu komoditas sayuran terpenting di Indonesia. Masalah terpenting dalam produksi cabai rawit adalah rendahnya produktivitas. Aplikasi nanosilika diharapkan dapat meningkatkan produktivitas cabai rawit. Penelitian ini bertujuan untuk mengetahui pengaruh aplikasi nanosilika lewat daun terhadap pertumbuhan dan hasil panen cabai rawit pada budi daya menggunakan mulsa polyethylene dan irigasi tetes. Penelitian ini dilaksanakan di Kebun Percobaan Leuwikopo, Institut Pertanian Bogor, dengan jenis tanah latosol dan koodinat 6°33'50.2"S 106°43'31.0"E. Penelitian menggunakan Rancangan Kelompok Lengkap Teracak (RKLT) dengan satu faktor yaitu konsentrasi nanosilika yang diberikan dalam 5 taraf perlakuan yaitu 0, 1.5, 3, 4.5 and 6 ml L-1 dengan 3 ulangan. Variabel yang diamati adalah karakter vegetatif, respon perkembangan dan hasil tanaman. Hasil penelitian menunjukkan bahwa aplikasi nanosilika pada cabai rawit Harita pada sistem budi daya menggunakan mulsa polyethylene dan irigasi tetes tidak meningkatkan variabel vegetatif tanaman dan hasil tanaman. Kata kunci: buah layak jual, mulsa polyethylene, split fertigasi
Respon Pertumbuhan Cabai Hias (Capsicum annuum L.) dalam Pot terhadap Komposisi Pupuk AB Mix Nadiyah Mawaddah Ayuningtyas; Ketty Suketi; Muhamad Syukur
Buletin Agrohorti Vol. 11 No. 2 (2023): Buletin Agrohorti
Publisher : Departemen Agronomi dan Hortikultura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/agrob.v11i2.47137

Abstract

Tanaman cabai dapat dibudidayakan sebagai tanaman hias dalam pot karena keragaan tanaman yang tidak terlalu tinggi, memiliki buah yang berwarna-warni, dan tampilannya menarik. Penelitian ini bertujuan untuk mengetahui pengaruh beberapa komposisi pupuk AB mix terhadap penampilan genotipe cabai hias Viola, Adelina, dan Ayesha sebagai tanaman hias dalam pot. Penelitian ini dilaksanakan di rumah kaca Kebun Percobaan Cikabayan, IPB Dramaga Bogor pada bulan Agustus sampai November 2019. Percobaan ini dilakukan menggunakan rancangan petak terbagi (split plot RKLT). Petak utama adalah pemupukan: P1 (AB mix cabai hara tinggi), P2 (AB mix cabai hara rendah), dan P3 (AB mix general). Anak petak adalah: G1 (Viola), G2 (Adelina), dan G3 (Ayesha). Peningkatan pertumbuhan dan keragaan cabai hias genotipe Viola, Adelina, dan Ayesha dapat dilakukan dengan pemberian pupuk AB Mix cabai baik yang memiliki kandungan hara tinggi maupun rendah dan AB mix general. Genotipe Viola dan Ayesha memiliki keragaan terbaik pada 10 MST dengan pemberian pupuk AB mix general. Tanaman cabai hias genotipe Adelina memiliki keragaan terbaik pada 10 MST dengan pemberian pupuk AB mix cabai hara tinggi. Kata kunci: AB mix, keragaan, komposisi pupuk, proporsi tanaman, tanaman hias
Correlations between Leaf Nitrogen, Phosphorus and Potassium and Leaf Chlorophyll, Anthocyanins and Carotenoids Content at Vegetative and Generative Stage of Bitter Leaf (Vernonia amygealina Del.) Betty Tjhia; Sandra Arifin Aziz; Ketty Suketi
Journal of Tropical Crop Science Vol. 5 No. 1 (2018): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (648.936 KB) | DOI: 10.29244/jtcs.5.1.25-33

Abstract

Vernonia amygdalina Del. (Asteraceae) is a nutritional and medicinal plant that is used widely throughout tropical Africa and other countries. The leaves are proved to have strong antioxidant property. The concentration of chlorophyll a, chlorophyll b, anthocyanins and carotenoids in five different leaf positions of vegetative and generative phases were studied. The aim of the study is to understand and to correlate the content of the three nutrients and the bioactive compounds along the five leaf positions at vegetative and generative stage of the crop growth. The study showed that the concentration of chlorophyll a and b was higher, and anthocyanin concentration was almost zero in the generative than in the vegetative stage. The leaf concentration of N, P, and K were higher in vegetative than in generative stage. At vegetative stage, N positively correlated with chlorophyll a at the 1st leaf; K had strong correlations with anthocyanins at the 2nd and 3rd leaf and with chlorophyll a at the 2nd and 5th, and with chlorophyll b and carotenoids at the 5th leaf. At the generative stage, P had a strong positive correlation with carotenoids at 4th and 5th leaves, and K positively correlated with chlorophyll a and b at 5th leaf. The findings suggest that bitter leaf is better to be harvested at vegetative stage, and that potassium level is important to increase ­anthocyanins and carotenoids content.
Heat Unit Establishment as Harvest Criteria on “Mas Kirana” Banana at Various Times of Anthesis Muhammad Syaifuddin Abdurrohim; Winarso Drajat Widodo; Ketty Suketi
Journal of Tropical Crop Science Vol. 5 No. 2 (2018): Journal of Tropical Crop Science
Publisher : Department of Agronomy and Horticulture, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (344.634 KB) | DOI: 10.29244/jtcs.5.2.41-48

Abstract

The method for determining the appropriate time to harvest banana could affect the shelf life and quality of banana fruits during storage. The objectives of this study were to establish the heat unit as harvesting criteria of banana “Mas Kirana” and to evaluate how heat unit affects fruit shelf life and postharvest maturity characteristics. The research was conducted at PTPN VIII Parakansalak Plantation, Sukabumi, West Java, Indonesia, in November 2017 to February 2018. Laboratory analysis was conducted in Postharvest Laboratory, Department of Agronomy and Horticulture IPB in February to April 2018. The experiment was organized in a completely randomized design with a single factor of eight different flower tagging times after anthesis. Each treatment was replicated five times totaling 40 experimental units. The results showed that the different times of anthesis did not affect fruit size, weight per hand, number of fruits per hand and weight per fruit. Different time of anthesis did not affect respiration rate, fruit shelf life, physical and chemical quality. The minimum heat unit of 650ºC degree days can be used as harvesting criteria for banana “Mas Kirana”. The number of day after anthesis was 39 to 43 with fruit shelf life of 12 to 16 days. 
Co-Authors , Mukhlas Abdullah Bin Arif Aidil Fitriansyah Alveno, Vitho Anas Dinurrohman Susila Ani Kurniawati Arista, Mei Lianti Awang Maharijaya Azzuhdy, Muhammad Zakiyuddin Siroj betty betty Betty Tjhia Cenra Intan Hartuti Tuharea Chandi Tri Akbar DADANG DADANG Deli, Syekh Zulfadli Arofah Dhika Prita Hapsari Dian Pratanda Rizki Didy Sopandie Efendi, Darda Elke Camelia Halim Faqih Udin Farah Maulida Febjislami, Shalati Fidianinta , Fitria Andini Hamdani, Kiki Kusyaeri Imanda, Nandya Jamaluddin, Moh Agus Jian Ayu Pratiwi Juang G. Kartika Juang Gema Kartika Krisantini Krisantini , Krisantini Lestari, Mutiara Dwi Lia Rachmawati M. Luthfan Taris Mathias Pratama Mei Lianti Arista Moh Agus Jamaluddin Mohamad Rahmad Suhartanto Muhamad Noor Azizu, Muhamad Noor Muhamad Syukur Muhammad Syaifuddin Abdurrohim Mukdisari, Yurisqi Mustika Dwi Rahayu Muthi’ah Khairun Nisa Nadiyah Mawaddah Ayuningtyas Nandya Imanda Nasib, Samson Bin Natalia, Cristina Evi Neni Musyarofah Nian Rimayanti H. Nicha Muslimawati Nidya Putri Zulia Kusuma Wardani Nilam Mayasari Nur Asmah, Nur Nurkholis Nurkholis Purwono Purwono, Purwono Putra, Bagas Akmala Rahardjo, Rizky RAHMI YUNIANTI Rahmi Yunianti Rasmani, Rasmani Riana Jumawati Risna rusdan Rizki, Dian Pratanda Rizky Rahardjo Roedhy Poerwanto Samson Bin Nasib Sandra Arifin Aziz Septy Yurihastuti Setyadjit Shalati Febjislami Slamet Susanto Sobir Sobir Sriani Sujiprihati SRIANI SUJIPRIHATI Suryo Wiyono Susanti, Lea Susanto, Renaldy Tanari, Yulinda Turi Handayani Winarso D. Widodo Winarso Drajat Widodo Yurihastuti, Septy Yusnita Sari