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| DOI： |
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| Impact of Tillage on Yield and Water Use Efficiency of Summer Maize in Eastern Henan Province |
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ZHANG Xiaopei， ZHOU Xinguo， WANG Jingli, FAN Xiangyang，HUANG Zhongdong， YANG Shenjiao， WANG Hezhou
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Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453002, China; National Agro-ecological System Observation and Research Station of Shangqiu, Shangqiu 476000, China; Henan Agricultural University, Zhengzhou 450002, China
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| Abstract: |
| Summer maize grows in rainy season in Eastern Henan Province and excessive seasonal rainfall could result in waterlogging, detrimentally impacting the plant growth. In attempts to find suitable cultivating and agronomical methods for the summer maize, a field experiment was conducted in this paper to investigate the effect of different tillages on soil water, plant traits, grain yield, and water use efficiency. Four tillageswere examined: plowing (FT), sub-soiling (ST), rotary tillage (RT) and no tillage (CK), before sowing. The results showed that compared with CK, FT and ST substantially reduced the soil water content in the top 0～20cm soil after heavy rainfalls, and as a result, the plant height and LAI of the maize increased during the middle and late growing stages. FT and ST increased the grain yield by 26.55% and 19.67%, and water use efficiency by 15.37% and 9.69%, respectively, compared with CK. In contrast, RT reduced the yield by 3.45%. In summary, FT and ST are more efficientto alleviate waterlogging occurring in the summer maize filed in Eastern Henan Province. |
| Key words: tillage management; soil water content; summer maize; water use efficiency |
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