Aplikasi Kombinasi Bahan Organik Terhadap Ketersediaan dan Serapan Hara K Serta Pertumbuhan Tanaman Padi Hitam (Oryza sativa L.) di Tanah Sawah
Authors: Manurung Windi Nisa , Hanum Hamidah , Razali Razali 
Published: January 2019

Di dalam bahan organik terdapat senyawa-senyawa lain yang bermanfaat bagi tanaman seperti asam humik, asam fulvat, dan senyawa organik lain. Bahan organik itu sendiri dinilai beradasarkan kualitas dan ketersediaannya. Oleh karena itu diperlukan kombinasi bahan organik yang berguna untuk mencukupi kebutuhan tanaman yang dapat meningkatkan ketersediaan dan serapan hara K tanaman padi hitam (Oryza sativa L.) di tanah sawah. Tujuan penelitian ini adalah mengetahui pengaruh aplikasi kombinasi bahan organik terhadap ketersediaan dan serapan hara K serta pertumbuhan tanaman padi hitam (Oryza sativa L.) di tanah sawah. Penelitian ini dilakukan dengan menggunakan Rancangan Acak Lengkap (RAL) Non Faktorial dengan 7 perlakuan dan 3 ulangan yaitu A (kontrol), B (jerami kompos+kotoran ayam, 50g+50g/pot), C (jerami kompos+kotoran kambing, 50g+50g/pot), D (jerami kompos+kotoran sapi, 50g+50g/pot), E(jerami cacah+kotoran ayam, 50g+50g/pot), F(jerami cacah+kotoran kambing, 50g+50g/pot), G(jerami cacah+kotoran sapi, 50g+50g.pot). Data dianalisis dengan sidik ragam dan uji lanjut Kontras Orthogonal. Hasil penelitian menunjukkan bahwa aplikasi kombinasi bahan organik berpengaruh nyata terhadap parameter pH tanah dan jumlah anakan 6 MST namun berpengaruh tidak nyata terhadap K-dd, K-HCl 25%, tinggi tanaman, dan serapan K tanaman. Aplikasi kombinasi bahan organik memiliki potensi yang sama dalam meningkatkan K-dd, K-HCl 25% dan jumlah anakan tanaman. Penambahan jerami kompos + kotoran sapi berpotensi meningkatkan jumlah anakan tanaman.
Organic materials contain beneficial compounds to plants such as humic acid and fulvic acid, and they are valued based on its quality and availability. Therefore we need a combination of organic materials to meet the plants’ need and to increase the availability and K uptake on black paddy (Oryza sativa L.) at paddy fields. The purposes of this study was to determine the effect of the organic matter combination application on the availability and K uptake, as well as the growth of black rice plants (Oryza sativa L.) at paddy fields. This study was conducted using Non Factorial Completely Randomized Design (RAL) with 7 treatments and 3 replications namely A (control), B (compost straw + chicken manure, 50g + 50g / pot), C (compost straw + goat manure, 50g + 50g / pot), D (compost straw + cow dung, 50g + 50g / pot), E (chopped straw + chicken manure, 50g + 50g / pot), F (chopped straw + goat manure, 50g + 50g / pot), G (chopped straw + cow dung, 50g + 50g.pot). Data were analyzed by variance and Orthogonal Contrast further test. The results showed that the application of organic matter combination had a significant effect on the parameters of soil pH and 6 MST number of tillers, but had no significant effect on K-dd, 25% K-HCl, plant height, and plant K uptake. The application of organic materials combination has the same potential in increasing K-dd, 25% K-HCl and the number of plant tillers. The addition of compost + cow manure has the potential to increase the number of plant tillers.