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
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.
CHEN Li-Dong-,YANG Xia-Wei-,CHEN Wei- et al. Effects of water-fertilizer coupling with straw returning on yield and quality of rice[J]. Journal of Drainage and Irrigation Machinery Engin, 2018, 36(11): 1152-1156.
QIN Shanshan, HOU Zongjian, WU Zhongdong, et al. Effects of water and nitrogen coupling on nitrogen absorption and yield of winter wheat[J]. Journal of drainage and irrigation machinery engineering, 2017, 35(5):440-447.(in Chinese)
HU Yajie, ZHU Dawei, XING Zhipeng, et al. Modi-fying nitrogen fertilization ratio to increase the yield and nitrogen uptake of super japonica rice[J]. Journal of plant nutrition and fertilizer, 2015, 21(1):12-22.(in Chinese)
张超,林彦宇,聂堂哲,等. 水稻水肥耦合效应研究[J]. 节水灌溉,2016(2):23-27.
ZHANG Chao, LIN Yanyu, NIE Tangzhe, et al. Application of BP neural network in coupling effect of water and fertilizer on rice based on saturated design and RAGA[J]. Water saving irrigation, 2016(2):23-27.(in Chinese)
HU N, WANG B, GU Z, et al. Effects of different straw returning modes on greenhouse gas emissions and crop yields in a rice—wheat rotation system[J]. Agriculture ecosystems & environment, 2016, 223:115-122.
ZHANG P, CHEN X, WEI T, et al. Effects of straw incorporation on the soil nutrient contents, enzyme activities, and crop yield in a semiarid region of China[J]. Soil & tillage research, 2016, 160:65-72.
WANG Wei, ZHU Liqun, WANG Wenbo, et al. Effects of different treatments of fertilization and irrigation on rice yield and soil fertility and enzyme activity in wheat straw amendment field[J]. Bulletin of soil and water conservation, 2015,35(4):43-48.(in Chinese)
HOU Xianqing, TANG Jin, YU Longlong, et al. Effect of autumn mulching tillage on growth and water use efficiency of potato[J]. Journal of drainage and irrigation machinery engineering, 2016, 34(2):165-172.(in Chinese)