Suppression of weed occurrence in a five-year corn-earthworm coculture system

文献类型： 外文期刊

第一作者： Li, Tao

作者： Li, Tao;Fan, Jiequn;Qian, Zhenguan;Yuan, Guohui;Lv, Weiguang;Meng, Dandan;Guo, Shuiliang

作者机构：

关键词： Biodiversity; Pheretima guillelmi; seed predation; soil seedbank; weed community

期刊名称：WEED SCIENCE （ 影响因子：2.713； 五年影响因子：2.868 ）

ISSN： 0043-1745

年卷期： 2021 年 69 卷 2 期

页码：

收录情况： SCI

摘要： The use of a corn-earthworm coculture (CE) system is an eco-agricultural technology that has been gradually extended due to its high economic output and diverse ecological benefits for urban agriculture in China. However, the effect of CE on weed occurrence has received little attention. A 5-yr successive experiment (2015 to 2019) was conducted to compare weed occurrence in CE and a corn (Zea mays L.) monoculture (CM). The results show that CE significantly decreased weed diversity, the dominance index, total weed density, and biomass, but increased the weed evenness index. The 5-yr mean number of weed species per plot was 8.4 in CE and 10.7 in CM. Compared with those in CM, the 5-yr mean density and biomass of total weeds in CE decreased by 59.2% and 66.6%, respectively. The effect of CE on weed occurrence was species specific. The mean density of large crabgrass [Digitaria sanguinalis (L.) Scop.], green foxtail [Setaria viridis (L.) P. Beauv.], goosegrass [Eleusine indica (L.) Gaertn.], and common purslane (Portulaca oleracea L.) in CE decreased by 94.5%, 78.1%, 75.0%, and 45.8%, whereas the mean biomass decreased by 96.2%, 80.8%, 76.9%, and 41.4%, respectively. Our study suggests that the use of CE could suppress weed occurrence and reduce herbicide inputs in agriculture.

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