Effect of phosphorus, zinc and copper fertilizer application on yield, physical and chemical characteristics of lowland rice grain variety IR-64
1991
Mudjisihono, R. | Koswara (Balai Penelitian Tanaman Pangan Sukamandi, Jawa Barat (Indonesia))
An experiment was carried out to study the effects of phosphorus, zinc (Zn), and copper (Cu) fertilizers application on yield, physical and chemical characteristics of low land rice variety IR-64 at Sukamandi Research Institute for Food Crops and Kulonprogo (Yogyakarta) in the wet season of 1987/1988. Treatment of the experiment consisted of phosphorus fertilizer application (100 and 200 kg TSP/ha). Each of the phosphorus rate was combined with zinc fertilizer (0; 1; 2; 4; 8 percent) and copper fetilizer (0; 2 percent). Laboratory analyses included yield, physical, characteristic (1000 kernel weight, density, rice hull thickness, percentage of green kernels), milling quality and chemical characteristic (amylose, protein and ash content). Result indicated that rice yield at Sukamandi was higher than those at Kulonprogo. At Kulonprogo, application of zinc and copper fertilizer tended to increase yield. At Sukamandi, application of phosphorus fertilizer (100 kg/ha) in combination with zinc (4-8 percent) and copper (2 percent) improved physical quality of the rice; while at Kulonprogo, application of phosphorus fertilizer (200 kg/ha) and copper fertilizer (2 percent) tended to depress physical quality. Application of zinc and copper fertilizer do not negatively affect milling quality of rice (rendement of milled rice and head rice). Amylose content was affected by application of zinc and copper fertilizers; protein and ash content were slightly affected by the application of the fertilizer.
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