Effects of different fertilizers on pests and diseases, weeds and paddy yield
Different fertilizers were applied in the paddy field (variety F-2000) to observe their effect on diseases and insect pests, weeds and paddy yield. The six fertilizer treatments (urea, N-P-K complex, BB-Si fertilizer, organic manure, organic manure + urea, and animal manure) were designed with a control (no fertilizer) and the paddy field was applied with 195 kg pure nitrogen per hectare as basal dressing at one time before transplanting. The results showed that rice leafroller (Cnaphalocrocis medinalis) was better controlled in the treatments of BB-Si fertilizer and animal manure as compared with urea, indicating no remarkable differences from the control. The densities of weeds were remarkably decreased in paddy fields applied with animal manure and N-P-K complex as compared with the organic manure, the organic manure + urea and the control. All fertilizer treatments increased the paddy yield substantially as against the control.