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All Journal Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Jurnal Silva Samalas: Journal of Forestry and Plant Science Makara Journal of Science
Rukmini Kusmarwiyah
Jurusan Agronomi, Fakultas Pertanian, Universitas Gadjah Mada, Jl. Sosioyusticia, Bulaksumur, Yogyakarta 55281, Indonesia
Agriculture, Biological Sciences & Forestry Economics, Econometrics & Finance Environmental Science

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Physiological Responses of Jatropha to Drought Stress in Coastal Sandy Land Conditions Parwata, I Gusti Made Arya; Indradewa, Didik; Yudono, Prapto; Kusmarwiyah, Rukmini
Makara Journal of Science Vol. 16, No. 2
Publisher : UI Scholars Hub

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Abstract

Jatropha curcas L., an important tropical biofuel crop, is reputed for its drought resistance, however, its ability to perform in dry conditions has still hardly been investigated. Changes in leaf water status, chlorophyll content, leaf surface temperature, stomatal conductance, proline and abcisic acid (ABA) content, transpiration and photosynthetic rate were studied in four Jatropha genotypes (IP-1A, IP-2M, Local superior and Yellow leaf) and subjected to drought stress in coastal sandy land conditions in Central Java, Indonesia. Drought stress significantly decreased the leaf water status, leaf chlorophyll content, stomatal conductance, transpiration and photosynthetic rate, and increased leaf temperature, proline and ABA content. Resistant genotypes (IP-1A and IP-2M) had significantly higher leaf water status, chlorophyll content and photosynthetic rate than susceptible genotypes (Local superior and Yellow leaf). There were no differences between the Jatropha genotypes on leaf temperature, stomatal conductance and transpiration rate
PERTUMBUHAN DAN HASIL TANAMAN KANGKUNG DARAT (Ipomea reptans Poirs) PADA BEBERAPA JARAK TANAM DAN PEMBERIAN PUPUK BOKASHI KOTORAN KAMBING DOSIS YANG BERBEDA Farida, Nihla; Harmi, Juni; Kusmarwiyah, Rukmini
Jurnal Silva Samalas Vol. 7 No. 1 (2024): Juni 2024
Publisher : Universitas Pendidikan Mandalika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/jss.v7i1.12106

Abstract

Penelitian ini bertujuan untuk mengetahui pengaruh pemberian bokashi kotoran kambing dosis yang berbeda terhadap pertumbuhan dan hasil tanaman kangkung darat yang ditanam pada jarak tanam yang berbeda.  Informasi tentang jarak tanam kangkung dan dosis bokashi pupuk kandang yang tepat yang menunjang pertumbuhan dan hasil optimal tanaman kangkung darat penting untuk diketahui agar didapatkan teknik budidaya yang efektif dan efisien serta ramah lingkungan.  Percobaan ini dilakukan di Desa Belanting, Lombok Timur yang ditata menurut Rancangan Acak Kelompok dengan dua faktor perlakuan. Faktor pertama yaitu dosis pupuk bokashi kotoran kambing: 0 ton/ha, 5 ton/ha, 10 ton/ha, 15 ton/ha dan 20 ton/ha, dan faktor kedua yaitu jarak tanam: 5 cm x 10 cm, 5 cm x 15 cm, 5 cm x 20 cm, dengan tiga ulangan. Data hasil pengamatan dianalisis menggunakan analisis sidik ragam dan diuji lanjut dengan BNJ pada taraf 5%.  Hasil penelitian menunjukkan bahwa hanya faktor jarak tanam yang berpengaruh terhadap parameter pengamatan, dan tidak ada interaksi antar dua faktor perlakuan. Jarak tanam lebar menyebabkan tinggi tanaman, jumlah daun, diameter batang per tanaman tertinggi. Sebaliknya, jarak tanam sempit menyebabkan berat segar per petak dan per Ha (berat ekonomi) tertinggi.
Respon Pertumbuhan dan Hasil Tanaman Jarak Pagar (Jatropha curcas L.) terhadap Cekaman Kekeringan di Lahan Pasir Pantai pada Tahun Pertama Siklus Produksi Parwata, I Gusti Made Arya; Indradewa, Didik; Yudono, Prapto; Kertonegoro, Bambang Djadmo; Kusmarwiyah, Rukmini
Jurnal Agronomi Indonesia (Indonesian Journal of Agronomy) Vol. 42 No. 1 (2014): 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 (272.077 KB) | DOI: 10.24831/jai.v42i1.8152

Abstract

ABSTRACTDevelopment of Jatropha, an important tropical biofuel crop, to coastal sandy soil is an urgent situation due to more limited of fossil fuel in one side, and high potency of coastal sandy land that has not been utilized yet. Tolerant and sensitive genotypes of Jatropha were treated with drought stress using watering interval, and their responds on the vegetative growth and yield were studied in this reasearch. Drought stress significantly decreased all vegetative growth parameters observed, except the number of branch. Different jatropha genotypes had different number of branch, number of leaf, root surface area, total of root length, root diameter, plant dry weight, shoot root ratio and light absorption. IP-1A genotype had the highest yield, i.e 33.54 g of dry seed plant-1 (equal to 0.15 ton ha-1), in the first year.Keywords: biofuel, sand, watering
Co-Authors Bambang Djadmo Kertonegoro Didik Indradewa Harmi, Juni I Gusti Made Arya Parwata Nihla Farida Nunik Cokrowati Prapto Yudono Suriani, Baiq Suherna