Effects of water-fertilizer coupling with straw returning on yield and quality of rice
CHEN Lidong1, YANG Xiawei2, CHEN Wei1, ZHOU Mingyao2*
1.Jiangsu Surveying and Design Institute of Water Resources Co. Ltd., Yangzhou, Jiangsu 225127, China; 2.School of Hydraulic Energy and Power Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China
Abstract：In order to study effects of water-fertilizer coupling on yield and quality of rice under of straw returning condition, pot experiments were conducted based three factors such as soil moisture(water stress in late rice tillering, water stress in late tillering and grain-filling, normal water treatment), nitrogen application rate and straw returning rate by employing orthogonal experiment method, and at the same time, three groups were designed, including one control group. Results showed that soil moisture and nitrogen application rate as well as straw returning rate had a greater impact on rice yield. Within the allowable range, the rice yield increased with increasing irrigation water, straw returning rate and nitrogen application rate. However, beyond the range, with increasing straw returning rate and nitrogen application rate, the yield didn't rise but exhibited a reduction in some degree.Interestingly, when nitrogen application rate was 270 kg/hm2, soil moisture was in normal water treatment and straw returning rate was 4 200 kg/hm2, the rice yield reached the highest value. Nitrogen application rate and soil moisture also affected protein content of rice grain. When nitrogen application rate was 324 kg/hm2, water stress was in late-tillering and straw returning rate was 4 200 kg/hm2, the protein content of rice grain arrived at the maximum.
陈立冬, 杨夏威, 陈伟, 周明耀*. 秸秆还田条件水肥耦合对水稻产量与品质的影响[J]. 排灌机械工程学报, 2018, 36(11): 1152-1156.
CHEN Lidong, YANG Xiawei, CHEN Wei, ZHOU Mingyao*. Effects of water-fertilizer coupling with straw returning on yield and quality of rice. Journal of Drainage and Irrigation Machinery Engin, 2018, 36(11): 1152-1156.
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