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| Effects of different straw return measures on segetal weed diversity in the winter fallow period |
| Received:October 19, 2021 |
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| KeyWord:straw return;winter fallow period;segetal weed;soil stoichiometric ratio;clustering analysis;biodiversity |
| Author Name | Affiliation | E-mail | | GUI Haoran | International Joint Research Laboratory for Global Change Ecology, School of Life Sciences, Henan University, Kaifeng 475004, China
Taohuayu Yellow River Tidal Flat Systems Observation and Research Station of Henan Province, Xingyang 450100, China | | | WANG Jian | International Joint Research Laboratory for Global Change Ecology, School of Life Sciences, Henan University, Kaifeng 475004, China
Taohuayu Yellow River Tidal Flat Systems Observation and Research Station of Henan Province, Xingyang 450100, China | | | DONG Xiongde | International Joint Research Laboratory for Global Change Ecology, School of Life Sciences, Henan University, Kaifeng 475004, China
Taohuayu Yellow River Tidal Flat Systems Observation and Research Station of Henan Province, Xingyang 450100, China | | | CHEN Li | International Joint Research Laboratory for Global Change Ecology, School of Life Sciences, Henan University, Kaifeng 475004, China | | | HUANG Yaqi | International Joint Research Laboratory for Global Change Ecology, School of Life Sciences, Henan University, Kaifeng 475004, China | | | CHEN Zhijie | International Joint Research Laboratory for Global Change Ecology, School of Life Sciences, Henan University, Kaifeng 475004, China
Taohuayu Yellow River Tidal Flat Systems Observation and Research Station of Henan Province, Xingyang 450100, China | | | HAN Shijie | International Joint Research Laboratory for Global Change Ecology, School of Life Sciences, Henan University, Kaifeng 475004, China
Taohuayu Yellow River Tidal Flat Systems Observation and Research Station of Henan Province, Xingyang 450100, China | hansj@iae.ac.cn |
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| Abstract: |
| To explore the effects of maize（Zea mays）, peanut（Arachis hypogaea）, and soybean（Glycine max）straw return measures on weed diversity in the winter fallow period, the weed occurrence and diversity in maize, peanut, and soybean were quantitatively compared through a weed species investigation and controlled experiment of straw removal, full straw return, and double straw return. The study produced several important results：the weed diversity in the soybean field was significantly increased by 36.0% under double straw addition, while that in the corn field was significantly decreased by 71.6%. Furthermore, the difference of weed flora between soybean and corn field was amplified with the increase in the amount of straw addition（the Bray–Curtis distance between the two cases was 0.72 under double straw addition）. The response of peanut to straw return was not significant. Different straw qualities and quantities had different effects on soil carbon and nitrogen. The change in weed community diversity during the fallow period did not affect the development of weeds in subsequent growing season. Therefore, scientific methods of straw return according to different crop types can control the diversity of the farmland ecosystem. |
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