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Integrated rice management simultaneously improves rice yield and nitrogen use efficiency in various paddy fields

Pedosphere 2020年第6期30卷 863-873页

作者： Yujiao DONG Fanwen ZENG Jiang YUAN Guangbin ZHANG Yuanxue CHEN Xuejun LIU Padilla HILARIO Tusheng REN Shihua LU College of Resources and Environmental Sciences China Agricultural UniversityBeijing 100193China Soil and Fertilizer Institute Sichuan Academy of Agricultural SciencesChengdu 610066China Bureau of Agriculture in Shehong County Suining CitySichuan ProvinceShehong 629200China State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China Sichuan Agricultural University Wenjiang 611130China Kadoorie Farm and Botanic Garden Hong Kong 999077China

The hilly area of Southwest China is a typical rice production area which is limited by seasonal droughts and low temperature in the early rice growth period.A field experiment was conducted on three typical paddy fields(low-lying paddy field,medium-elevation paddy field,and upland paddy field)in this ***(N)treatment(180 kg N ha-1 year-1)was compared to a control treatment(0 kg N ha-1 year-1)to evaluate the effects of integrated rice management(IRM)on rice growth,grain yield,and N *** rice management integrated raised beds containing plastic mulch,furrow irrigation,and triangular *** comparison to traditional rice management(TRM),IRM promoted rice tiller development,with 7–13 more tillers per cluster at the maximum tillering stage and 1–6 more tillers per cluster at the end of tillering *** rice management significantly increased the rice aboveground biomass by 34.4%–109.0%in different growth periods and the aboveground N uptake by 25.3%–159.0%.Number of productive tillers significantly increased by 33.0%,resulting in a 33.0%increase in grain yield and 8.0%improvement of N use efficiency(NUE).Grain yields were significantly increased in all three paddy fields assessed,with IRM being the most important factor for grain yield and productive tiller *** of paddy field type and N level on N uptake by aboveground plants were reflected in the rice reproductive growth period,with the effects of IRM more striking due to the dry climate *** conclusion,IRM simultaneously improved rice yield and NUE,presenting a valuable rice management technique in the paddy fields assessed.

关键词： grain yield hilly area nitrogen uptake paddy field type plastic mulch traditional rice management

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