Peningkatan Produksi Pangan pada Lahan Sawah dengan Penerapan Pemupukan Hara Spesifik Lokasi (PHSL) Melalui Evaluasi Status Unsur Hara Tanah

ABSTRACTS An Increase of The Yield of Paddy Rice with Application of The Site-Specific Nutrient Fertilization (SSNF) through Evaluation of The Nutrient Soil Status. Agricultural land including paddy fields decreases every year due to land conversion and decreasing of water resources for irrigation. However, the need for food (rice) increases simultaneously with the increasing of population growth. Although inorganic fertilizer and improved varieties of rice have been intensively used, however, expected rice production has not been achieved. Fertilization based on site-specific nutrient might require for solving the problems. Research concerning of the site-specific nutrient fertilization (SSNF) have been carried out at Megati, District of Selemadeg Timur Tabanan Regency from April to October 2015. The objective of the research was to find out the effects of several types of fertilization with different composition on the growth and yield of rice. The treatments were Kd0P0 (without fertilizer), Kd0P1 ( without organic fertilizer ; 100 kg urea, 25 kg SP36,and 25 kg KCl ha-1), Kd0P2 (without organic fertilizer ; 150 kg urea, 50 kg SP36 and 50 kg KCl ha-1), Kd0P3 (without organic fertilizer; 200 kg urea, 75 kg SP36 dan 75 kg KCl ha-1), Kd1P1 ( 5 tons of organic fertilizer ha-1; 100 kg urea, 25 kg SP36,and 25 kg KCl ha-1 ), Kd1P2 ( 5 tons of organic fertilizer ha-1; 150 kg urea, 50 kg SP36 and 50 kg KCl ha-1 ), Kd1P3 (5 tons of organic fertilizer ha-1; 200 kg urea, 75 kg SP36 and 75 kg KCl ha-1 ), and SSNF (5 tons of organic fertilizer ha-1; Rainbow NPK 200 kg ha-1 and 75 kg urea ha-1). The results showed that the plant height and the highest number of productive tillers was obtained from Kd1P3 treatment. The highest yield was obtained from the SSNF treatment. The SSNF treatment produced 9.12 ton dried grain ha-1. Keywords: production of rice, SSNF, nutrient soil status