Abstract
The characteristics of crop-livestock systems is crop yield for food or vegetable, and stover or leaf for ruminant feed, being the manure used as organic fertilizer. Phosphorus (P) is the major plant nutrient and considered one of the primary factors limiting crop yields. Rock phosphate (RP) is one of some organic P fertilizer which could increased its solubility if mixed at the initial phase of manure decomposition process. The objective of the research was to investigate the influence of some kind of organic fertilizer on production and nutrient concentration of okra (Abelmoschus esculentus L) leaf as forage. A field experiment of randomized block design with 9 treatments and three replicates was done, and the treatments were T1 (RP), T2 (azolla compost), T3 (cow manure), T4 (goat manure), T5 (poultry manure), T6 (azolla+RP), T7 (cow manure+RP), T8 (goat manure+RP), T9 (poultry manure+RP). Okra leaf defoliated at 80 days after planting, and continued measured for fresh leaf production, nitrogen and phosphorus concentration. The results showed that the treatment significantly affected to the fresh leaf production, concentration of nitrogen and phosphorus. The result of DMRT showed that fresh leaf production, concentration of N and P significantly higher if fertilized by goat manure+RP (T8) and poultry manure+RP (T9) compared to another treatments.
 Keywords: Abelmoschus esculentus L, rock phosphate, manure, nutrient, production
Highlights
The characteristics of crop-livestock systems is crop yield for food or vegetable, and stover or leaf for ruminant feed, being the manure used as organic fertilizer
The results showed that the treatment significantly affected to the fresh leaf production, concentration of nitrogen and phosphorus
Decomposition characteristics of organic manure in soil and influence of manure application on extractable Fe and Zn. Proceeding of the XIII International Plant Nutrition Qolloquium
Summary
Ciri khas sistem integrasi tanaman-ternak adalah hasil utama tanaman pertanian untuk pangan atau sayuran, jerami atau hijauannya untuk pakan ternak ruminansia sedangkan pupuk kandang (pukan) digunakan sebagai pupuk organik. Batuan fosfat (BP) sebagai salah satu pupuk P organik yang dapat ditingkatkan kelarutannya apabila dicampurkan bersamaan dengan proses dekomposisi pupuk organik. Tujuan penelitian ini untuk menguji pengaruh beberapa macam pupuk organik terhadap produksi dan kadar nutrisi daun okra (Abelmoschus esculentus L) sebagai hijauan pakan. Hasil penelitian menunjukkan bahwa perlakuan pemupukan berpengaruh nyata terhadap produksi segar hijauan, kadar N dan P. Hasil uji DMRT menunjukkan bahwa produksi hijauan segar, kadar N dan P nyata lebih tinggi jika dipupuk pukan kambing+BP (T8) dan pukan ayam+BP (T9) dibanding perlakuan lainnya. Kata kunci: Abelmoschus esculentus L, batuan fosfat, pupuk kandang, nutrisi, produksi
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