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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Agroland : Jurnal Ilmu-Ilmu Pertanian AGROTEKBIS Jurnal Sains Teknologi dan Lingkungan (JSTL) Jurnal Agrotropika AGROTEKBIS: Jurnal Ilmu Pertanian
Iskandar M. Lapanjang
Fakultas Pertanian Universitas Tadulako
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Computer Science & IT Economics, Econometrics & Finance Public Health

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PENGARUH JENIS MULSA TERHADAP PERTUMBUHAN DAN HASIL BAWANG MERAH (Allium ascalonicum Var. Lembah Palu) YANG DIBERI SUNGKUP Wisudawati, Muhammad Anshar, Iskandar Lapanjang, Diakh
AGROTEKBIS Vol 4, No 2 (2016)
Publisher : AGROTEKBIS

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Abstract

This research aims to determine the effect of various types of mulch on the growth and yield components of shallot varieties Lembah Palu were are given the containment. This research was conducted at the Hall Horticulture Seed Napu Watumaeta Village, Poso district, Central Sulawesi Province. The timing of the research in the May-July 2015. This study uses a randomized block design one factor. The treatments tested were four types of mulch that is without mulch, rice straw mulch, black plastic mulch and silver plastic mulch, each treatment was repeated three times so that there are 4 x 3 = 12 units of a plot. Data processed by analysis of variance and differences  among the treatments were tested were determined by LSD 5%. The results showed that rice straw mulch and silver plastic mulch resulted in the highest increase plant height and length of the longest leaf at the age of 50 days after planting. Black plastic mulch, and silver plastic mulch and without mulch produce the largest bulbs convolution results.
APLIKASI KOMPOS DAN Azotobacter sp. TERHADAP PERTUMBUHAN DAN PRODUKSI TANAMAN CABAI MERAH (Capsicum annuum L.) Toago, Saddam P.; Lapanjang, Iskandar M.; Barus, Henry N.
AGROTEKBIS Vol 5, No 3 (2017)
Publisher : AGROTEKBIS

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The aims of this research are to determine growth and production of chili (Capsicum annuum L.) provided compost and bacteria Azotobacter sp. This study used a randomized block design factorial with two treatment factors. The first factor is compost consisting of : compost 15 t ha-1, 20 tha-1, and 25 t ha-1. The second factor is the bacteria Azotobacter sp. consisting of without giving Azotobacter sp. and giving Azotobacter sp. Each treatment was repeated four times so that there are 24 units trial. The results showed the bacteria Azotobacter sp. administration significantly affected plant height, root length, root volume, fresh weight of plants, plant dry weight, number of fruit crops, and the weight of the fruit crop. The results showed plant height, root length, root volume, fresh weight of plants, plant dry weight, number of fruit crops, and the weight of the fruit crop the highest in the delivery of Azotobacter sp. is each by 42,1 cm, 238,4 cm, 8,88 ml, 22,1 g, 5,60 g, 4,92 buah, 5,79 g. While the treatment of compost and their interaction had no significant effect on the observed variables. Key Words : Azotobacter sp., Chili, Compost, growth, production. 
PERTUMBUHAN BIBIT SAMBUNG PUCUK DINI KAKAO (Theobroma cacao L.) KLON SUL-1 DAN SUL-2 YANG DIBERI PUPUK ORGANIK CAIR BERBEDA KONSENTRASI Iskandar M. Lapanjang, Usman Made, Putu Sribawanti
AGROTEKBIS Vol 4, No 3 (2016)
Publisher : AGROTEKBIS

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The research aimed to obtain the better concentration of liquid organic fertilizer on the growth of each cacao, compare the growth of cleft grafting seedling of Sul 1 and Sul 2 cacao clones and gain the concentration of liquid organic fertilizer which was better on the growth of early grafting cacao seedling. The research was conducted in December 2015 to February 2016 in Green House of Faculty of Agriculture, Tadulako University. The research used two-factor Randomized Block Design. The first factor was clone consisting of Sul 1 and Sul 2 clones. The second factor was the concentration of liquid organic fertilizer consisting of concentration of liquid organic fertilizer by 0.0%, concentration of liquid organic fertilizer by 0.25%, concentration of liquid organic fertilizer by 0.50%, and concentration of liquid organic fertilizer by 0.75%. The data were analyzed by using analysis of variance of median value test done with BNJ 5%. The research showed that the concentration of liquid organic fertilizer by 0.75% is better on Sul 1 clone. It was shown by more numerous and long shoots, more numerous and wide leaves and the more total chlorophyll. Mean while, the concentration of liquid organic fertilizer which is better for Sul 2 clone is the 0.50%.       it was shown by more numerous and long shoots, more numerous and wide leaves and the more total chlorophyll.
PENGARUH JARAK TANAM TERHADAP PERTUMBUHAN DAN HASIL TANAMAN PADI (Oryza sativa L.) PADA POLA JARAK TANAM YANG BERBEDA DALAM SISTEM TABELA Magfiroh, Nur; Lapanjang, Iskandar M.; Made, Usman
AGROTEKBIS Vol 5, No 2 (2017)
Publisher : AGROTEKBIS

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The study aimed to find plant spacing for better growth and yield of wetland rice crops under direct seeded planting system.  The study was arranged in a Randomized Block design with two factors i.e. two different spatial plantings and three kinds of Jajar Legowo patterns.  The plant spacing of 25 cm  x 25 cm with Jajar Legowo pattern of  2:1 produced highest grain yield (8.21 ton ha-1) followed by the plant spacing of 20cm x 20cm with Jajar Legowo pattern of 3:1 (7.21 ton ha-1).  Jajar Legowo pattern of 3:1 resulted in better plant height (74.80cm), similarly plant spacing of 25cm x 25 cm also had same plant height, more tiller number (30.69) and panicles per clump, longer panicle length and more grain number. Key Words: Jajar Legowo, Plant spacing, and Rice.
PERTUMBUHAN DAN HASIL TANAMAN PADI (Oryza sativa L) PADA BERBAGAI POLA JAJAR LEGOWO DAN JARAK TANAM Donggulo, Candra V; Lapanjang, Iskandar M.; Made, Usman
AGROTEKBIS Vol 6, No 4 (2018)
Publisher : AGROTEKBIS

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This study aims to get the right pattern Legowo row on each plant spacing; get Legowo row patterns are better on growth and yield of paddy; get better spacing on growth and yield of paddy. The study design randomized complete block design (CBD) with two factors, the first factor was spacing of the second stage and the second factor was the pattern Legowo row with 3 levels thus obtained 6 treatment combinations. Each combination treatment was repeated three times as a group so that the required 18 experimental plots. The results showed that the adoption of patterns Legowo row 2: 1 at a spacing of 20 cm x 20 cm resulted in higher plants while a spacing of 25 cm x 25 cm pattern Legowo row 3: 1 resulted in higher plants. Implementation patterns Legowo row 4: 1 to produce tillers and panicles number per clump more, whereas usage patterns Legowo row 3: 1 resulted in higher grain with an average of 7.29 tonnes ha-1 compared to other plant spacing pattern.
EFEKTIVITAS FUNGI MIKORIZA ARBUSKULAR DENGAN PROVENAN JARAK PAGAR PADA CEKAMAN KEKERINGAN Lapanjang, Iskandar M.; Purwoko, Bambang S.; Hariyadi, Hariyadi; Wilarso, Sri; Melati, Maya
JURNAL AGROTROPIKA Vol 16, No 1 (2011): Agrotropika Vol.16 No.1 2011
Publisher : JURNAL AGROTROPIKA

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Abstract

The study was conducted to investigate the effectiveness of Arbuscular Mycorrhizae Fungi (AMF) to make a symbiosis with physic nuts under drought stress condition. The experiment was carried out in plastic house in Kota Palu, Central Sulawesi, from October 2008 to January 2009. The experiment used completely randomized block design with 3 factors and 3 replications. The first factor was AMF type i.e. without AMF, AMF Glomus sp-1p, AMF Acaulospora sp-1p, and mixture of Glomus sp-1p and Acaulospora sp-1p. The second factor was the provenances of physic nut i.e. Palu, NTB, IP-1A, and IP-1P. The third factor was soil water content i.e. 80 and 40% of field capacity. The results showed that the application of AMF resulted in better growth of all provenances especially ecotype IP-1P, which was sensitive to drought, compared to control (without AMF). At 40% field capacity, mixture of Glomus sp-1p and Acaulospora sp-1p. was more effective compared to single AMF in improving plant growth. The highest AMF infection was found in ecotype Palu inoculated with mixture of Glomus sp-1p and Acaulospora sp-1p. Key words: infection level, Glomus, Acaulospora
Evaluasi Beberapa Ekotipe Jarak Pagar (Jatropha curcas L.) untuk Toleransi Cekaman Kekeringan Iskandar Lapanjang; Bambang S. Purwoko; , Hariyadi; Sri Wilarso Budi R; Maya Melati
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 36 No. 3 (2008): Jurnal Agronomi Indonesia
Publisher : Indonesia Society of Agronomy (PERAGI) and Department of Agronomy and Horticulture, Faculty of Agriculture, IPB University, Bogor, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (257.78 KB) | DOI: 10.24831/jai.v36i3.1386

Abstract

Drought stress in crop  occurs due to imbalance between water supply and demand.  Crop responses to drought stress  depend on their ecotypes.  This study was aimed at examining the tolerance of the physic nut ecotype to drought stress in inceptisol. This study was conducted at Silviculture greenhouse, Forestry Faculty IPB, from September to December 2007. A Completely Randomized Design with two factors was used in the experiment, i.e. water content (80, 60, and 40 % of field capacity) and physic nut ecotypes (Palu, NTB, IP-A, and IP-P) The results showed that (1) drought reduced stem diameter (31.4%), root length (65.49%) and leaf area (72.73%), and decreased plant dry weight (74.83%),(2) tolerance level of the evaluated physic nuts on the drought stress were moderate tolerance (IP-1A, NTB,  Palu) and sensitive (IP- Pakuwon).   Key words:  physic nut, drought stress, tolerance
Keberadaan Mikoriza Arbuskular pada Lokasi Pertanaman Jarak Pagar (Jatropha curcas L.) di Lembah Palu Iskandar Lapanjang
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 5 No. 1 (2019): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (423.882 KB) | DOI: 10.29303/jstl.v5i1.104

Abstract

Plant rhizosphere has various types of microorganisms, including Arbuscular Mycorrhizae Fungi (AMF). Each ecosystem has different species and densities of AMF. For further use, study the potency of indigenous AMF is necessary. This research was conducted to know the existence and potency of indigenous AMF of soil where physic nuts grow on dry land of Palu Valley at Poboya, Palu, Central Sulawesi. Soil samples were collected, and then observed under microscope. The steps to study the potency of AMF were counting the propagules with Most Probable Number (MPN) method, spora trapping, identifying the types of spore, and single spore culture. The result showed that the number of infective AMF propagules from cultivated soil was 1117 microorganisms/g soil and from of natural soil was 711 microorganisms/g soil; and indigenous AMF from the soil where physic nut grown at Lembah Palu were dominated by Glomus sp.
KEPADATAN DAN KERAGAMAN FUNGI MIKORIZA ARBUSKULA PADA PERTANAMAN JAGUNG (Zea mays L.) Abdul Rasyid; Iskandar M. Lapanjang; Henry N. Barus
Agroland: Jurnal Ilmu-ilmu Pertanian Vol 23, No 2 (2016)
Publisher : Universitas Tadulako

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Abstract

Utilization of arbuscular mycorrhizal fungi (AMF) is aimed at increasing crop productivityon marginal soils.AMF role as natural microorganisms areenhancing the absorption of nutrient, especially P,helping the plant to be able to withstand drought conditions as their hyphae are able to penetrate soil pores thus expanding the areas of water absorption, and protecting plant roots against pathogen attacks. Intensive planting would disturb the populationand development of the AMF. The purpose of this study was to observe the status of AMF sporeson maize (Zea mays L.).This study used a randomized block design (RAK) with 6 treatments and 5 replicates so that there were 30 experimental units.Factors studiedare several types of AMF based on the color of the corn plant area.Data fromthe study concluded that observationof AMFspores horizontally (H1, H2, and H3) showed no difference in the density of spores. In contrast, the treatment of vertical AMF(V1, V2, and V3) decreases the number of spores with increasing soil depth.  The diversity ofcolorbased AMF spores morphological types showed that there are four groups of colors i.e.yellow, brown , black, and translucent.In the Horizontal position, most AMF spores from left to right are black, while in the vertical position the dominant color is yellow.  The natural spore density in the rhizosphere of maize(Zea mays L.)generally ranges from 35 – 124 spores/10 g soil. Keywords : Arbuscularmycorrhizal fungi (AMF ), and maize.
PERTUMBUHAN DAN HASIL TANAMAN PADI (Oryza sativa L) PADA BERBAGAI POLA JAJAR LEGOWO DAN JARAK TANAM Candra V. Donggulo; Iskandar M. Lapanjang; Usman Made
Agroland: Jurnal Ilmu-ilmu Pertanian Vol 24, No 1 (2017)
Publisher : Universitas Tadulako

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Abstract

This study aimed to find the bestJajar Legowo system at different planting spaces for growth and yield of rice; to find Jajar Legowo system better for growth and yield of rice; and to find planting space better for growth and yield of rice.  The study used a Randomized CompletelyBlock design) with two factors including two kinds of planting spaces and three types of Jajar Legowo systems.  Each treatment combination had three replicates thus there were 18 experimental plots. The adoption of Jajar Legowo system of 2:1 at the planting space of 20 cm x 20 cm resulted in higher plant heights; similarlythe planting space of 25 cm x 25 cm at Jajar Legowo system of 3:1 produced higher plant heights.  The implementationof Jajar Legowo system of 4:1 had more tiller and panicle numbers per clump; whileJajar Legowo system 3:1 resulted in higher average grain weightwhich was 7.29 t/hacompared to the other Jajar Legowo system.Key Words :Jajar legowo, Planting space, Rice.
Co-Authors , Hariyadi Abdul Rasyid Bahrudin Bahrudin Bambang S. Purwoko Bambang S. Purwoko Candra V. Donggulo Donggulo, Candra V Henry N. Barus Junaidi Junaidi madauna, Ihcwan S, Magfiroh, Nur Manusama, Andre Latang Maya Melati Sri Wilarso Sri Wilarso Budi Syafrizal, Yusril Toago, Saddam P. Usman Made Yoga Yuniadi