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| Effects of cultivation practices on nitrogen absorption and utilization of rice and nitrogen and phosphorus contents of paddy tailwater |
| Received:November 02, 2022 Revised:January 16, 2023 |
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| KeyWord:tillage method;straw returning;fertilizer type;nitrogen absorption and utilization;nitrogen and phosphorus content of paddy tailwater |
| Author Name | Affiliation | E-mail | | DING Zhouyu | Jiangsu Crop Genetics and Physiology Key Laboratory Incubation Site/Jiangsu Modern Industrial Technology Collaborative Innovation Center for Grain Crops/Key Laboratory of Plant Functional Genome Ministry of Education, Yangzhou University, Yangzhou 225009, China | | | ZHANG Na | Changzhou Comprehensive Agricultural Technology Extension Center, Changzhou 213001, China | | | SHU Xiaowei | Jiangsu Crop Genetics and Physiology Key Laboratory Incubation Site/Jiangsu Modern Industrial Technology Collaborative Innovation Center for Grain Crops/Key Laboratory of Plant Functional Genome Ministry of Education, Yangzhou University, Yangzhou 225009, China | | | YANG Ying | Jiangsu Crop Genetics and Physiology Key Laboratory Incubation Site/Jiangsu Modern Industrial Technology Collaborative Innovation Center for Grain Crops/Key Laboratory of Plant Functional Genome Ministry of Education, Yangzhou University, Yangzhou 225009, China | | | WANG Shushen | Jiangsu Crop Genetics and Physiology Key Laboratory Incubation Site/Jiangsu Modern Industrial Technology Collaborative Innovation Center for Grain Crops/Key Laboratory of Plant Functional Genome Ministry of Education, Yangzhou University, Yangzhou 225009, China | | | FU Tong | Jiangsu Crop Genetics and Physiology Key Laboratory Incubation Site/Jiangsu Modern Industrial Technology Collaborative Innovation Center for Grain Crops/Key Laboratory of Plant Functional Genome Ministry of Education, Yangzhou University, Yangzhou 225009, China | | | ZHAO Shiru | Jiangsu Crop Genetics and Physiology Key Laboratory Incubation Site/Jiangsu Modern Industrial Technology Collaborative Innovation Center for Grain Crops/Key Laboratory of Plant Functional Genome Ministry of Education, Yangzhou University, Yangzhou 225009, China | | | WANG Zihan | Jiangsu Crop Genetics and Physiology Key Laboratory Incubation Site/Jiangsu Modern Industrial Technology Collaborative Innovation Center for Grain Crops/Key Laboratory of Plant Functional Genome Ministry of Education, Yangzhou University, Yangzhou 225009, China | | | ZHOU Juan | Jiangsu Crop Genetics and Physiology Key Laboratory Incubation Site/Jiangsu Modern Industrial Technology Collaborative Innovation Center for Grain Crops/Key Laboratory of Plant Functional Genome Ministry of Education, Yangzhou University, Yangzhou 225009, China | | | YAO Youli | Jiangsu Crop Genetics and Physiology Key Laboratory Incubation Site/Jiangsu Modern Industrial Technology Collaborative Innovation Center for Grain Crops/Key Laboratory of Plant Functional Genome Ministry of Education, Yangzhou University, Yangzhou 225009, China | | | JI Meidi | Changzhou Comprehensive Agricultural Technology Extension Center, Changzhou 213001, China | cszjmd2008@sina.com | | DONG Guichun | Jiangsu Crop Genetics and Physiology Key Laboratory Incubation Site/Jiangsu Modern Industrial Technology Collaborative Innovation Center for Grain Crops/Key Laboratory of Plant Functional Genome Ministry of Education, Yangzhou University, Yangzhou 225009, China | gcdong@yzu.edu.cn |
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| Abstract: |
| In order to quantify the effects of cultivation measures on rice yield formation, nitrogen absorption and utilization of rice, soil nutrient content, and nitrogen and phosphorus contents of paddy tailwater, three interaction experiments of straw returning by fertilizer varieties, straw returning by tillage methods, and tillage methods by fertilizer types were conducted, based on NJ9108 and Jinwuruanyu as rice varieties. Results showed that:Compared with that observed in the no-straw-returning treatment, the average rice yield of strawreturning treatment was 5.57% higher and the average panicle rate was 6.11% higher; the nitrogen absorption(NA), nitrogen use efficiency for grain yield(NUEg), nitrogen harvest index(NHI), nitrogen partial factor productivity(PFPN), and nitrogen fertilizer recovery(FRN) were 3.30%, 2.16%, 0.70%, 5.46%, and 4.96% higher, respectively; and the total soil nitrogen(TN)and available nitrogen(AN)contents were lower at the tillering stage and higher after the tillering stage; and the average contents of TN and TP in paddy tailwater were 4.83% and 39.28% higher druing the whole growth period, respectively. Compared with that observed in the shallow spin treatment, the average rice yield of the deep plowing treatment was 9.75% higher and the average panicle rate was 0.62% lower; the NA, NUEg, PFPN, and FRN were 3.27%, 6.33%, 9.76%, and 1.52% higher, respectively; NHI was 1.42% lower; the contents of soil TN and AN were 0.27% and 2.83% lower, respectively; and the average contents of TN and TP in paddy tailwater were 4.23% and 12.71% lower during the whole growth period, respectively. Compared with that observed in the fast-acting fertilizer treatment, the average rice yield of the slow-release fertilizer treatment was 12.01% lower and the average panicle rate was 2.95% lower; the NUEg, NHI, and PFPN were 13.89%, 4.48%, and 12.05% lower, respectively, whereas the NA and FRN were 1.92% and 3.85% higher, respectively; the content of soil TN was 1.50% higher, and the content of soil AN was 2.83% lower; and the average contents of TN and TP in paddy tailwater were 6.31% and 1.12% lower during the whole growth period, respectively. The highest yield value, a slightly higher FRN value, and higher TN and TP contents of paddy tailwater occurred with the interaction among straw returning, deep plowing, and fast-acting fertilizer, whereas a slightly lower yield, the lowest TN and TP contents of paddy tailwater, and the highest FRN value occurred with the interaction among straw returning, deep plowing, and slowacting fertilizer. The three-way interaction among straw returning, deep plowing, and fast-acting fertilizer was most beneficial for the improvement of rice yield, whereas that among no straw returning, deep plowing, and slow-acting fertilizer improved the nitrogen fertilizer recovery and reduced the nitrogen and phosphorus emissions from the paddy field into the atmosphere. |
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