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All Journal Jurnal Ilmu Pertanian Prosiding SNATIF Jurnal Penelitian Pertanian Terapan Caraka Tani: Journal of Sustainable Agriculture JURNAL AGRI-TEK Makara Journal of Science
Prapto Yudono
Fakultas Pertanian, Universitas Gadjah Mada
Agriculture, Biological Sciences & Forestry Education

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IDENTIFIKASI SIFAT BENIH KAWISTA (Feronia limonia (L.) Swingle) UNTUK TUJUAN PENYIMPANAN Murrinie, Endang Dewi; Yudono, Prapto; Purwantoro, Azis; Sulistyaningsih, Endang
Prosiding SNATIF 2017: Prosiding Seminar Nasional Teknologi dan informatika (BUKU 1)
Publisher : Prosiding SNATIF

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Abstract

AbstrakPenanganan benih yang tepat dapat mempertahankan mutu benih selama penyimpanan atau dapat menekan laju kemunduran benih seminimal mungkin. Dalam terminologi penanganan benih terdapat tiga kelompok benih yaitu benih ortodoks, rekalsitran dan intermediate. Sampai saat ini belum diketahui apakah benih kawista masuk dalam kelompok ortodoks, rekalsitran atau intermediate sehingga dalam rangka untuk mempertahankan viabilitasnya selama dalam penyimpanan perlu dilakukan identifikasi sifat benih kawista. Tujuan penelitian adalah mengidentifikasi sifat benih kawista untuk tujuan penyimpanan. Benih kawista yang digunakan berasal dari Desa Dasun, Kecamatan Lasem, Kabupaten Rembang. Pengujian sifat benih dengan menggunakan metode yang dikemukakan Hong & Ellis (1996). Selain itu juga dilakukan pengamatan terhadap bobot kering dan kadar air benih selama perkembangan benih mulai dari antesis sampai benih masak. Hasil penelitian menunjukkan benih kawista termasuk dalam kriteria benih ortodoks, karena tetap menunjukkan viabilitas yang tinggi yang ditunjukkan oleh persentase perkecambahan yang tetap tinggi dan tidak berbeda nyata pada beberapa tingkat kadar air. Persentase perkecambahan berkisar antara 96,0-98,5% pada semua kadar air, yaitu kadar air 40,6% (kadar air setelah ekstraksi); 10,5% dan 5,5% (baik sebelum maupun setelah disimpan tiga bulan pada suhu -20 0C) dengan bobot kering kecambah yang tidak berbeda nyata.  Kata kunci: benih, kawista, ortodoks, rekalsitran
Karakterisasi Pola Mineralisasi N Pupuk Organik Pada Tanah Sawah Organik Winarni, Marti; Yudono, Prapto; Indradewa, Didik; Hendro Sunarminto, Bambang
JURNAL AGRI-TEK Vol 16, No 1 (2015): JURNAL AGRI-TEK
Publisher : JURNAL AGRI-TEK

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Abstract

Organic rice cultivation rely only source of nutrients of organic fertilizers and other natural inputs. One way to meet the needs of nitrogen in organic rice cultivation is to utilize the organic fertilizers. The purpose of this study was to examine the influence of the type of organic fertilizers on N-available content in the soil, the characterization of the pattern of mineralization of N-available from types of organic fertilizer, and determine the three types of organic fertilizer which has a pattern of fast nitrogen mineralization, medium and slow. This research was conducted through experimental methods in greenhouse Faculty of Agriculture of Gadjah Mada University from November 2012 until May 2013. Experiments using randomized completely design (RCD), consisting of 1 factor and 3 replications. These factors is incubation organic fertilizer in soil organic lowland, consisting of 10 types: Callyandra callothyrsus, Leucaena leucocephala, Sesbania grandiflora, Albizia falcata, Cassia siamea, Gliricidia sepium, Samania saman, Herocarpus indica, manure, and control (without organic fertilizer). The results showed that the use of organic fertilizers can improve the content of N-available in the soil as compared to manure and without organic fertilizer. In general, the pattern of nitrogen mineralization of organic fertilizers on soil organic lowland started 3 weeks after incubation and increased up to 9 weeks after incubation, and then decreased 12 weeks after incubation period. Sesbania grandiflora, Gliricidia sepium and Leucaena leucocephala, respectively, have the character pattern nitrogen mineralization fast, medium and slow.Keywords: organic fertilizers, N mineralization, soil organic lowland
Effect of Acetic Acid as Pre-Emergence Herbicide on Maize Germination Pujisiswanto, Hidayat; Yudono, Prapto; Sulistyaningsih, Endang; Sunarminto, Bambang Hendro
Jurnal Penelitian Pertanian Terapan Vol 15, No 1 (2015)
Publisher : Politeknik Negeri Lampung.

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (215.136 KB) | DOI: 10.25181/jppt.v15i1.113

Abstract

Profitable crop production starts with a weed control program that includes pre-emergence herbicides to deliver long-lasting, residual weed control. Pre-emergence herbicides are applied to prevent the germination of weed seeds. The study was conducted to determine the effect of acetic acid as a pre-emergence herbicide on maize germination. Pots experiment was conducted on August until September 2012. The experimental design used was Completely Randomized Design (CRD) single factor in four replicates. The application of pre-emergence acetic acid at several concentration, i.e. control (no acetic acid) 0%, 10% acetic acid and 20% acetic acid. The result showed that the pre-emergence aplication at 10% and 20% of the glacial acetic acid solution lowered pH were 5,12 and 5,43 respectively at one week after application, so that inhibited maize germination. No shoots and roots were grew. This was due to the increase of electrical conductivity (EC) or electrolyte leakage caused by the high permeability of the damaged membrane of seed. The EC of control treatment was 11?S/cm g, compared to 10 and 20% treatment of acetic acid were 36 ?S / cm g and 55 ?S / cm g EC respectively. Increasing concentration of acetic acid caused the higher of protein content leaked, i.e. 7,95%, 7,32% and 7,03% respectively for without acetic acid treatment, 10% and 20% acetic acid. Acetic acid also inhibited respiration rate of maize seed, where the higher concentration of acetic acid produced the lower respiration rate, i.e. 31.63 mg/g/hour, 12.38 mg/g/hour and 2,75 mg/g/hour respectively for without acetic acid treatment, 10% and 20% acetic acid. Keywords : Acetic Acid, Maize (Zea mays L.), Germination, Pre-Emergence Herbicide
The Growth Performance of Oil Palm Seedlings in Pre-Nursery and Main Nursery Stages as a Response to the Substitution of NPK Compound Fertilizer and Organic Fertilizer Adileksana, Cahyo; Yudono, Prapto; Purwanto, Benito Heru; Wijoyo, Rachmanto Bambang
Caraka Tani: Journal of Sustainable Agriculture Vol 35, No 1 (2020): April
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (440.656 KB) | DOI: 10.20961/carakatani.v35i1.33884

Abstract

The need of nitrogen (N), phosphate (P) and potassium (K) nutrient in oil palm nursery are usually fulfilled with synthetic chemical fertilizers such as NPK fertilizer. The application of NPK fertilizer can cause the soil to become hard due to the accumulation of the residue left on the ground. Cow manure is able to substitute NPK fertilizer based on the chemical status of the soil. This study aimed at analyzing the effect of NPK fertilizer substitution with cow manure on the growth of oil palm seedlings in the pre-nurseries and main nurseries. The experiment was conducted from February to September 2018 in the Banguntapan research and experimental field, Faculty of Agriculture, Universitas Gadjah Mada. The experiment applied the Randomized Complete Block Design (RCBD) with one factor and six blocks as replications. The factors were subtitution using the replacement series method with five levels of doses, 100% NPK, 75% NPK + 25% cow manure, 50% NPK + 50% cow manure, 25% NPK + 75% cow manure and 100% cow manure. The observed parameter variables were root lenght, root area, hump diameter, leaf area, the number of leaves, plant height and plant dry matter. The use of 25% NPK substitute with 75% organic material was the best result in increasing the growth performance of oil palm seddlings in pre-nursery and main nursery.
Effects of auxin and cytokinin levels on the success of air layering in tea plant clones of GMB 7 and GMB 9 using husk charcoal, cocopeat and moss media Widyastuti, Ika Betty; Yudono, Prapto; Putra, Eka Tarwaca Susila
Jurnal Ilmu Pertanian Vol 5, No 2 (2020): August
Publisher : Faculty of Agriculture, Universitas Gadjah Mada jointly with PISPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2848.866 KB) | DOI: 10.22146/ipas.53019

Abstract

The research aimed to propagate tea plants by air layering in order to obtain new plants with shorter immature plants period (TBM), which is 1.5 years, by utilizing wasted branches from routine clean pruning activities in tea plantations. The research was conducted from August 2018 to January 2019 at tea plantation of PT. Pagilaran, Batang, Central Java. Experiment using single factor treatment was arranged in a Completely Randomized Design with three replications. The treatment was layering media, consisting of husk charcoal, moss, and cocopeat, which were applied on GMB 7 and GMB 9 clones. The results showed significant effects of the layering media on the levels of auxin and cytokinin in GMB 7. The highest levels were found in the husk charcoal and moss media. Analysis of sucrose, glucose and total sugar as well as the physiological analysis of the air layering roots showed no significant difference in the fresh weight, dry weight, volume, surface area, diameter, and length of the roots. Husk charcoal resulted in the highest success rate of the air layering in GMB 7, which was 100%. Meanwhile, GMB 9 showed significant difference only in the auxin levels. There was no significant effect of layering media on the analysis of sucrose, glucose and total sugar as well as on the physiological analysis of the air layering roots. Both husk charcoal and moss media resulted in the highest success rate of the air layering in GMB 9, which was 58.33%.   
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
Co-Authors Adileksana, Cahyo Azis Purwantoro Bambang Hendro Sunarminto Bambang Hendro sunarminto Benito Heru Purwanto Didik Indradewa Eka Tarwaca Susila Putra Endang Sulistyaningsih Hidayat Pujisiswanto I Gusti Made Arya Parwata Rukmini Kusmarwiyah Syamsul Arifin Widyastuti, Ika Betty Wijoyo, Rachmanto Bambang Winarni, Marti