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Impact of Fertilizing Pattern on the Biodiversity of a Weed Community and Wheat Growth

文献类型： 外文期刊

作者： Tang, Leilei 1 ; Cheng, Chuanpeng 1 ; Wan, Kaiyuan 1 ; Li, Ruhai 4 ; Wang, Daozhong 5 ; Tao, Yong 1 ; Pan, Junfeng 1 ; Xi 1 ;

作者机构： 1.Chinese Acad Sci, Key Lab Aquat Bot & Watershed Ecol, Wuhan Bot Garden, Wuhan, Peoples R China

2.Hainan Modern Agr Inspect & Testing Precaut & Con, Agr Dept Hainan Prov, Haikou, Peoples R China

3.Chinese Acad Sci, Ecol Restorat ECORES Lab, Chengdu Inst Biol, Chengdu, Peoples R China

4.Hubei Acad Agr Sci, Inst Plant Protect & Soil Sci, Wuhan, Peoples R China

5.Anhui Acad Agr Sci, Inst Soil & Fertilizer Sci, Hefei, Peoples R China

6.China Program Int

期刊名称：PLOS ONE （ 影响因子：3.24； 五年影响因子：3.788 ）

ISSN： 1932-6203

年卷期： 2014 年 9 卷 1 期

页码：

收录情况： SCI

摘要： Weeding and fertilization are important farming practices. Integrated weed management should protect or improve the biodiversity of farmland weed communities for a better ecological environment with not only increased crop yield, but also reduced use of herbicides. This study hypothesized that appropriate fertilization would benefit both crop growth and the biodiversity of farmland weed communities. To study the effects of different fertilizing patterns on the biodiversity of a farmland weed community and their adaptive mechanisms, indices of species diversity and responses of weed species and wheat were investigated in a 17-year field trial with a winter wheat-soybean rotation. This long term field trial includes six fertilizing treatments with different N, P and K application rates. The results indicated that wheat and the four prevalent weed species (Galium aparine, Vicia sativa, Veronica persica and Geranium carolinianum) showed different responses to fertilizer treatment in terms of density, plant height, shoot biomass, and nutrient accumulations. Each individual weed population exhibited its own adaptive mechanisms, such as increased internode length for growth advantages and increased light interception. The PK treatment had higher density, shoot biomass, Shannon-Wiener and Pielou Indices of weed community than N plus P fertilizer treatments. The N1/2PK treatment showed the same weed species number as the PK treatment. It also showed higher Shannon-Wiener and Pielou Indices of the weed community, although it had a lower wheat yield than the NPK treatment. The negative effects of the N1/2PK treatment on wheat yield could be balanced by the simultaneous positive effects on weed communities, which are intermediate in terms of the effects on wheat and weeds.

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