Alternate row mulching optimizes soil temperature and water conditions and improves wheat yield in dryland farming
文献类型： 外文期刊
作者： Yan Qiu-yan 1 ; Dong Fei 1 ; Lou Ge 2 ; Yang Feng 1 ; Lu Jin-xiu 1 ; Li Feng 1 ; Zhang Jian-cheng 1 ; Li Jun-hui 3 ; Duan Ze 1 ;
作者机构： 1.Shanxi Acad Agr Sci, Inst Wheat Res, Linfen 041000, Peoples R China
2.Columbia Univ, Dept Earth & Environm Engn, New York, NY 10027 USA
3.Univ Calif Irvine, Dept Earth Syst Sci, Irvine, CA 92697 USA
4.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Jiangsu, Peoples R China
关键词： mulching pattern; winter wheat; soil temperature; grain yield; water use efficiency
期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：2.848； 五年影响因子：2.979 ）
ISSN： 2095-3119
年卷期： 2018 年 17 卷 11 期
页码：
收录情况： SCI
摘要： Straw mulching allows for effective water storage in dryland wheat production. Finding a suitable straw mulching model that facilitates wheat growth was the objective of this study. A 2-year field experiment was conducted to investigate the effects of two straw mulching patterns (FM, full coverage within all the rows; HM, half coverage within alternate rows) and two mulching rates (4.5 and 9.0 t ha(-1)) on soil moisture, soil temperature, grain yield, and water use efficiency (WUE) of winter wheat in northern China, with no mulching (M0) as the control. Results showed that mulching increased the soil water storage in all growth stages under high mulching rates, with a stronger effect in later growth stages. Water storage under the HM model was greater in later stages than under the FM model. Soil water content of HM groups was higher than that of FM groups, especially in surface soil layers. Evapotranspiration decreased in mulched groups and was higher under high mulching rates. Aboveground biomass during each growth stage under the HM model was higher than that under M0 and FM models with the same mulched rate, leading to a relatively higher grain yield under the HM model. Mulching increased WUE, a trend that was more obvious under HM9.0 treatment. Warming effect of soil temperature under the HM pattern persisted longer than under the FM model with the same mulching rates. Accumulated soil temperature under mulched treatments increased, and the period of negative soil temperature decreased by 9-12 days under FM and by 10-20 days under HM. Thus, the HM pattern with 9.0 t ha(-1) mulching rate is beneficial for both soil temperature and water content management and can contribute to high yields and high WUE for wheat production in China.
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