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| DOI：10.13522/j.cnki.ggps.20170045 |
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| Combined Effect of Sowing Time and Deep Plough on Soil Moisture and Protein Content of Winter Wheat Grain |
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DAI Xinjun， XIA Qing， YANG Zhenping， GAO Zhiqiang， SUN Min
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Collage of Agriculture，Shanxi Agriculture University， Taigu 030801，China
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| Abstract: |
| 【Objective】 The purpose of this paper is to study the change in soil moisture after deep plough during summer fallow and its consequent impact on growth of winter wheat sown at different dates. 【Method】 Experiments with split-plot design were conducted following a deep plough during summer fallow in the Experimental Station at the Village of Qiu Jialing in Wenxi Country, Shanxi Province. We examined three sowing dates: September 20 (earlier sowing), October 1 (suitable sowing) and October 10 (later sowing); the experiment lasted two years from July 2012 to June 2014. 【Result】 Compared to the CK, the deep plough increased both water storage and its efficiency, increasing the 0~300 cm soil water by 26.90 mm in 2012—2013 and 45.54 mm in 2013—2014, which is equivalent to an increased storage efficiency by 39.92% and 19.04% respectively. Deep plough also increased soil moisture in winter and the protein content of grain of the wheat sown on October 1 compared with other two sowing dates. Slightly postponing the sowing date can significantly increase protein compositions and glu/gli, but postponing too much would have an adverse consequence. Variance analysis showed that sowing date and deep plough combined to affect soil water content in winter and the ultimate grain yield. Correlation analysis revealed that subsoil water content in winter was significantly related to yield and protein content of the grain. 【Conclusion】 Deep plough during summer fallow is beneficial to store the precipitation into soil, thereby improving soil moisture. This, along with sowing on October 1, can significantly improve soil water content in winter and yield and protein content of the grains. |
| Key words: dryland wheat; deep plough; sowing date; soil water; grain protein |
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