Soil management legacy alters weed-crop competition through biotic and abiotic pathways

被引：4

作者：

Gan, Huijie ^{[1
,3
]}

Emmett, Bryan D. ^{[2
,4
]}

Drinkwater, Laurie E. ^{[1
]}

机构：

[1] Cornell Univ, Sch Integrat Plant Sci, Hort Sect, 134A Plant Sci Bldg, Ithaca, NY 14853 USA

[2] Boyce Thompson Inst Plant Res, 533 Tower Rd, Ithaca, NY 14853 USA

[3] Univ Connecticut, Dept Plant Sci & Landscape Architecture, Storrs, CT 06269 USA

[4] ARS, USDA, Natl Lab Agr & Environm, 1015 N Univ Blvd, Ames, IA 50011 USA

来源：

PLANT AND SOIL | 2021年 / 462卷 / 1-2期

基金：

美国农业部;

关键词：

Soil legacy effects; Plant competition; Mycorrhizae; N acquisition; Niche partitioning; ARBUSCULAR MYCORRHIZAL FUNGI; BICOLOR L-MOENCH; COMMUNITY STRUCTURE; NITROGEN; DIVERSITY; ECOLOGY; METAANALYSIS; MICROBIOME; HYPOTHESIS; SYSTEMS;

D O I：

10.1007/s11104-021-04891-3

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Aims Agricultural practices often have persistent effects on soil physicochemical properties and soil biota, which can feedback to influence plant performance. We investigated management-induced differences in soil fertility and soil microbiota for their legacy effects on plant nutrient acquisition and crop/weed competition. Methods Sorghum bicolor (L.) Moench (sorghum), Ambrosia artemisiifolia (L) (ragweed), and Amaranthus powellii S. Wats. (pigweed) were grown as monocultures and mixtures in the greenhouse in soils with distinct management histories. Cross inoculations of sterilized soils were used to quantify biotic vs. abiotic influence on plant growth, nutrient uptake and competitive outcomes. Results Differences in management history led to a two-fold difference in soil organic matter (OM), and a 37% increase in N acquisition in all species in the high OM soil. The increase in N availability preferentially benefitted pigweed growth at the expense of sorghum. However, microbiota from the high OM soil alleviated the negative effects of pigweed competition on sorghum. Soil management legacy also affected sorghum tiller production and mycorrhizal colonization. Conclusion Management-induced differences in soil biotic and abiotic factors altered plant performance in a species-specific manner. Management legacy effects on soil microbiota have the potential to increase crop competitiveness against some weed species.

引用

页码：543 / 560

页数：18

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