Suijing 18,the main japonica rice variety in Heilongjiang,was used as experimental material.The effects of nitrogen application rate and proportion on yield and quality of japonica rice in cold region at different growth stages were studied by precise irrigation control.The results showed that the effects of nitrogen application rate and proportion on relative chlorophyll content,dry matter weight,yield and rice quality were different under W1 and W2 irrigation modes.When the application rate of nitrogen fertilizer was 140 kg/ha,and the application ratio of basal,tiller,spike and grain fertilizer was 4∶3∶2∶1,the final dry matter weight of rice was the largest and the yield was the highest.The yield of rice under W1 and W2 irrigation modes were 9675.9 and 9722.2 kg/ha,respectively,and the taste score was 83 and 85,respectively.The results showed that regulating the total amount and proportion of nitrogen application was an effective measure to improve rice yield and quality under water-saving irrigation(6.0× 103 m3/ha).At the same time,the interaction effects of nitrogen application rate and fertilizer ratio on rice yield,irrigation mode and nitrogen application rate on rice quality should be fully considered.
关键词
控灌/氮肥/粳稻/产量/品质
Key words
Control irrigation/Nitrogen fertilizer/Japonica rice/Yield/Quality
维普
万方数据