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Effect of a water-retaining agent on soil structure, photosynthesis, and water utilization

文献类型： 会议论文

第一作者： Yang Yonghui

作者： Yang Yonghui 1 ; Wu Pute 2 ; Wu Jicheng 3 ; Zhao Xining 1 ; Guan Xiujuan 3 ; He Fang 1 ;

作者机构： 1.College of Resource and Environmental Sciences. Northwest A & F University, Yangling 712100, China

2.Institute of plant nutrition & resource environment,Henan academy of agricultural sciences, Zhengzhou 450002,Henan

3.Institute of Soil and Water Conservation. Chinese Academy of Sciences, Yangling 712100, China

关键词： water-retaining agent;winter wheat;soil structure;water utilization efficiency

会议名称： International conference of international conference on combating land degradation in agricultral areas

主办单位：

页码： 802-806

摘要： Water-retaining agents can improve the soil structure, preserve soil moisture, promote efficient utilization of soil water and fertilizer. and boost crop yields. In this study, the photosynthesis rate (Pn), transpiration rate (Tr), water use efficiency (WUE) and water producing efficiency were examined at different gro.Arth stages of winter wheat that was grown using different treatments of a water-retaining agent, including 45 kg·hm-2, 52.5 kg·hm-2, and 60 kg·hm-2. The results indicate that the values for Pn, Tr and WUE of winter wheat were arranged in order from higher to lower for the booting, filling and jointing stages. In each growth stage, the Pn, Tr and WUE were higher with increased dosages of the water-retaining agent. The water producing efficiency was measured after the harvest; for winter wheat grown using the water-retaining agent it exceeded that of the crop without the agent by 5.4 kg·mm-1·hm-2, 5.5 kg·mm-1·hm-2 and 10.4 kg·mm-1·hm-2 for the three dosages, respectively. Meanwhile. water-retaining increased the content of soil organic matter. reduce soil bulk density, improve the stability of soil structure, reduce fractal dimension of soil aggregates, and improve the infiltration capacity.

分类号： X32`X32

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