Yield loss compensation effect and water use efficiency of winter wheat under double-blank row mulching and limited irrigation in northern China

文献类型： 外文期刊

第一作者： Yan, Qiuyan

作者： Yan, Qiuyan;Yang, Feng;Dong, Fei;Lu, Jinxiu;Li, Feng;Zhang, Jiancheng;Yan, Qiuyan;Duan, Zengqiang;Lou, Ge

作者机构：

关键词： Grain yield and growth parameters;Limited irrigation;Mulching pattern;Water use efficiency (WUE);Winter wheat

期刊名称：FIELD CROPS RESEARCH （ 影响因子：5.224； 五年影响因子：6.19 ）

ISSN： 0378-4290

年卷期： 2018 年 216 卷

页码：

收录情况： SCI

摘要： Maize straw residues as a surface mulching material would be an effective soil water-saving practice in wheat production for a wheat-maize rotation system in northern China. Additionally, combining a mulching pattern and limited irrigation could play an important role in enhancing the productivity of winter wheat. Therefore, open field experiments were carried out during 2012-2014 to study soil water content in depth, water use efficiency (WUE), soil temperature, wheat grain yield and root parameters under a mulching pattern [each-row mulching (ERM) and double-blank row mulching (DRM) with three mulching masses of 0. 4.5 and 9.0 t ha(-1)] and limited irrigation [no irrigation (I-0) and one-time irrigation in winter (I-1)]. Results indicated that wheat yields increased (mean 3.3%) or decreased (mean 5.4%) a little under ERM groups, with no irrigation. Irrigation for each row of mulch increased the wheat yield (mean 8.8%). With or without irrigation, yields under DAM were lower compared to ERM0, whereas, DRM4.5 and DRM9.0 had a higher grain yield than ERM4.5 and ERM9.0 (mean 25% under I-0 and 18.8% under I-1) as well as DRM0 (mean 24.1%). The DRM patterns with a high yield could have an equal effect with irrigation in winter. Additionally, irrigation could enhance the effects of DRM on wheat yield increase (mean 6.87 t ha(-1) DRM4.5 and 7.06 t ha(-1) in DRM9.0). Effective tillers and above-ground biomass would be the key factors for determining wheat yield, especially under certain mulching patterns, although these effects were not reflected in wheat roots. Mulching on soil temperature had a more significant difference in an early growth period than the later stages of wheat. An additional feature was that the DRM pattern had a persistent heat preservation effect in the regrowth stage, while there was a lower soil temperature in ERM groups in this stage when there was no irrigation. Mulching managed to shorten the period of negative accumulated temperatures of wheat (mean of 7 days under ERM and 15 days under DRM) under Io. Winter water irrigation enhanced the shorten effect to a certain extent. Mulching had a more significant water conservation effect in the overwinter stage with lower precipitation and higher soil evaporation. Soil water content under DRM groups was richer than ERM groups in the late growth stage, when there was lower plant density and evapotranspiration, but there was a higher yield and WUE (with a mean of 18.6% under Io and 20.3% under I-1). The results suggest that the DRM pattern optimizes soil temperature, water content, balance roots and group effects as well as increasing wheat yield. Thus, this approach could be a better field management option for wheat growth and yield production under the limitations of water in northern China.

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