Peningkatan Ketersediaan Fosfor Tanah dan Tanaman serta Hasil Padi Sawah pada Inceptisols asal Jatinangor Melalui Aplikasi Pembenah Tanah dan Pemupukan

Abstrak

Inceptisols is a soil order that usually low in organic matter and nutrient content. This condition 
resulted to dominantly sub optimal soil that is required to be amended prior cultivation process.
Inceptisols properties can be enhanced through the addition of organic matter such as water hyacinth
compost, straw biochar, humic acid, and guano. Besides organic matter, the integration of NPK
fertilizer can improve the chemical and physical characteristics of the soil, nutrient availability, and
optimize rice productivity in Inceptisols. This experiment aimed to identify the optimal dosage of soil
amendments in combination with N, P, and K fertilizers to maximize phosphorus availability in the soil
and plants, as well as rice yields in Inceptisols. This experiment took place from September 2025 to
January 2026 at the Soil Chemistry and Plant Nutrition Laboratory Experimental Garden, Faculty of
Agriculture, Universitas Padjadjaran, Jatinangor, Sumedang. The experiment used a Randomized
Complete Block Design with six treatments and four replications, that is: control; recommended N, P,
K; soil amendment; ½ soil amendment + ¾ dose of N, P, K; 1 soil amendments + ½ dose of N, P, K; 1 ½
soil amendment + ¼ dose of N, P, K. One dose of soil amendment used was 8000 kg ha-1, while one dose
of N, P, K fertilizer was 350 kg ha-1 Urea, 50 kg ha-1 SP-36, and 50 kg ha-1 KCl. The results of the
experiment showed that the dose of 1 soil amendment + ½ dose of N, P, K yielded a percentage of grain
per panicle of up to 94.75% and provided the highest available P and P uptake by plants.