Climate change such as an increase in temperature, a change in rainfall patterns, an increase in extreme weather events, and an increase in sea level will affect the agricultural sector, including land degradation. Land degradation can take the form of a decrease in soil fertility, so the use of suboptimal land needs to be applied technology that can increase nutrient availability, and at the same time mitigate the impacts of climate change. The research objective was to obtain technology that could increase soil fertility through the substitution of inorganic fertilizers with organic fertilizer from poultry combined with rice husk biochar in wet suboptimal land. The research was conducted in Sungai Rengas Village, Sungai Kakap District, Kubu Raya Regency, West Kalimantan Province, Indonesia. The method used in this study was an experimental method in the form of a completely randomized design (CRD). The treatment in this study was the application of 5 tons of poultry manure per hectare with 5 tons of rice husk biochar per hectare, so that 7 treatment combinations were obtained, namely treatment A, B, C, D, E, F, and G. The results showed that the combination of 5 tonnes/ha of quail manure with 5 tonnes/ha of rice husk biochar had a significant effect on increasing soil fertility and growth of corn plants and can reduce the use of inorganic fertilizers by 25% to 75% of the recommended dosage.
The research purposes: (1) Producing enriched compost of oil palm Empty Fruit Bunches (EFB) with coastal mud and rice husk biochar that is suitable for application to acid sulphate soils, (2) Getting the best dosage to increase acid sulphate soil fertility. The method used: complete random design (CRD) factorial pattern, the first factor composition of enriched oil palm EFB compost, second factor: doses of compost enriched. Data analysis using analysis of Varian (ANOVA), significant differences continued with Honestly Signiant Difference Test (HSD). The variables observed were: soil pH H2O, Each-Al, Total-N, Bray-P and each-K. The results showed: compost oil palm EFB treatment significantly affected the each-K, whilst did not significantly affect the pH H2O, Total-N, Bray-P and each-Al. Although enriched compost treatment did not significantly, and the finding is the treatment enriched compost trend to increased pH H2O, Total-N and Bray-P.
Tanah sulfat masam merupakan salah satu tanah suboptimal, memiliki potensi untuk pengembangan budidaya tanaman, namun memiliki keterbatasan : rendahnya kadar pH tanah, hara N,P dan K, kapasitas tukar kation, kejenuhan basa, tingginya kadar Al, Fe, Mn, maka alternatif penggunaan bahan organik tersedia lokal seperti tandan kosong sawit (TKKS) berpeluang dimanfaatkan menjadi kompos yang diperkaya untuk memperbaiki kesuburan tanah tersebut . Belum ada rekomendasi khusus tentang aplikasi kompos yang diperkaya pada tanah sulfat masam. Anjuran umum yaitu aplikasi kompos secara tunggal dengan dosis 5-15 ton/ha. Sehingga perlu metode baru melalui perlakuan pengayaan kompos (compost enrichment) dengan amalioran yang tersedia lokal seperti lumpur laut dan biochar sekam padi. Penelitian bertujuan : menghasilkan dosis terbaik kompos TKKS diperkaya yang dapat meningkatkan pertumbuhan dan hasil tanaman padi. Penelitian ini menggunakan metode eksperimen (experiment design), dengan Rancangan Acak Lengkap (RAL). Penelitian dilaksanakan di Desa Sungai Rengas Kecamatan Sungai Kakap, Kabupaten Kubu Raya, mulai bulan Maret sampai Juli 2018. Hasil penelitian menunjukkan bahwa perlakuan t3 (aplikasi kompos TKKS, lumpur laut sebanyak 15 ton/ha) memberikan pengaruh nyata terhadap jumlah anakan produktif tanaman padi yaitu sebanyak 18,58 anakan. Selanjutnya untuk variabel tinggi tanaman padi, perlakuan t3 juga menghasilkan rata-rata tertinggi yaitu 89,33 cm. Perlakuan t8 (aplikasi kompos TKKS, lumpur laut dan arang sekam padi sebanyak 10 ton/ha) menghasilkan berat gabah tertinggi yaitu 346,3 gram/m2, dan perlakuan t9 (aplikasi sebanyak 15 ton/ha ketiga bahan tersebut) menghasilkan berat gabah 1000 butir tertinggi yaitu 24,989 gram. Kata kunci : Kompos, Lumpur Laut, Tanah Sulfat Masam
The availability of fertile land is currently increasingly limited, so land use leads to suboptimal land. Suboptimal land constraints are low elements of N, P, K, S, and microelements, low soil pH, the possibility of Al and Fe poisoning. The use of bokashi quail manure and rice husk biochar is expected to overcome suboptimal land constraints. The objective of this study is to apply the best amount of bokashi and biochar to soybean plants in poor soil. The study employed a completely randomized design, a field experiment methodology. The study used two types of treatments: bokashi quail dung, which came in doses of 15, 30, and 45 grams per polybag, and rice husk biochar, which came in doses of 15, 30, and 45 grams per polybag. According to the study’s findings, applying bokashi 30 grams per polybag along with 15 grams of rice husk biochar per polybag could lead to the greatest rise in soil pH when compared to other treatments. The use of bokashi quail manure alone, at doses between 30 and 45 grams per polybag, can result in the highest plant height and number of leaves compared to other treatments.
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