Djoko Purnomo
Program StudiAgroteknologiFakultasPertanian UNS Jl. Ir. Sutami, Kentingan, Surakarta

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Effects of Biochar and Organic Fertilizer Application on Soybean Growth Under Melaleuca cajuputi Stand Nurmalasari, Aprilia Ike; Rahayu, Muji; Sakya, Amalia Tetrani; Purnomo, Djoko; Arviana, Annisa Dian
Agrikultura Vol 36, No 1 (2025): April, 2025
Publisher : Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/agrikultura.v36i1.50692

Abstract

The production of agricultural commodities is affected by the reduction of productive land, whichis due to the land conversion into residential and industrial areas. Maximizing the potential of dry land with biochar and organicfertilizerapplication can potentiallybecome the solution to overcome it. Biochar functions to retain water and hold nutrients, while organic fertilizer can enhance soil fertility. The research aims to analyze the effects of biochar and organic fertilizers application on soybean growth in agroforestry planting areas. This research was conducted at Menggoran Forest Resort, Playen, Gunungkidul, Yogyakarta, from March to June 2022. The experiment was designed in a factorial randomized complete block design (RCBD) with two factors. The First factor was types of biochar (without biochar, rice husk biochar, coconut shell biochar), and the second factor was types of organic fertilizer (without organic fertilizer, chicken manure, cow manure, and goat manure). The observed variables were leaf area index (LAI), specific leaf weight (SLW), leaf area ratio (LAR), specific leaf area (SLA), crop growth rate (CGR), net assimilation rate (NAR), and soil N-total percentage. The data were analyzed using analysis of variance (ANOVA), and if the treatment showed significant differences, Duncan’s Multiple Range Test (DMRT) at a 5% significance level was performed. The results showed no interaction between the type of biochar and the type of organic fertilizer. The application of biochar and organic fertilizers tested did not increase any of the observed growthparameters.The application of organic fertilizer independently has an effect on the percentage of soil N-total, and cow and goat manure application resulted in significantly higher final soil N-total percentages compared to without organic fertilizer treatment.
In Vitro Proliferation and Acclimatization of Kepok Banana Unti Sayang (ABB) with Addition of Organic Materials Rachmi, Devinawati; Samanhudi; Purnomo, Djoko
Jurnal Hortikultura Indonesia (JHI) Vol. 11 No. 2 (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.11.2.91-100

Abstract

Pisang kepok (Musa balbisiana) mengandung genom B dengan potensi pencoklatan tinggi dan tingkat proliferasi rendah dalam kultur in vitro. Salah satu cara mengurangi pencoklatan dan meningkatkan kandungan vitamin serta hormon dalam media, yaitu dengan penambahan suplemen sintetik maupun ekstrak bahan organik alami. Penelitian ini bertujuan mengetahui proliferasi eksplan pisang kepok Unti Sayang dengan media diperkaya ekstrak buah dan kemampuan aklimatisasi planletnya. Penelitian ini terdiri atas 2 percobaan, pertama tahap in vitro menggunakan Rancangan Acak Lengkap split plot dengan 2 faktor, yaitu main plot (3 taraf suhu ruang kultur) dan subplot (5 taraf ekstrak buah). Kedua, tahap aklimatisasi menggunakan Rancangan Acak Lengkap split plot dengan 2 faktor, yaitu main plot (4 taraf media aklimatisasi) dan subplot (4 taraf vigor planlet). Hasil percobaan menunjukkan penambahan ekstrak buah pada media MS berpengaruh, sedangkan perbedaan suhu inkubasi tidak berpengaruh terhadap proliferasi eksplan pisang kepok Unti Sayang. Media MS dengan penambahan ekstrak buah pepaya (150 g L-1) dan air kelapa (100 ml L-1) memberikan hasil yang tidak berbeda nyata dengan penambahan vitamin sintetik terhadap proliferasi dan morfogenesis eksplan pisang kepok Unti Sayang. Vigor planlet pada berbagai media aklimatisasi tidak berbeda nyata dengan kemampuan hidup mencapai 92%.