The effects of 55 years of different inorganic fertiliser regimes on soil properties and microbial community composition
The effects of 55 years of different inorganic fertiliser regimes on soil properties and microbial community composition
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DOI：
10.1016/j.soilbio.2013.08.008
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发表时间：
2013-12
影响因子：
9.7
通讯作者：
Alwyn Williams;G. Börjesson;K. Hedlund
中科院分区：
文献类型：
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作者：
Alwyn Williams;G. Börjesson;K. Hedlund
农业施肥增加作物产量，但可能造成环境破坏，因此提倡减少无机肥料的施用。在过去十年中，农民对磷矿石的使用量有所下降，这可能导致土壤养分枯竭，从而破坏未来的作物生产。我们在四个地点调查了八种不同无机肥料制度的长期（55年）影响：不施磷钾肥（PK）或每年更换收获的PK，结合0，50，100或150 kg氮（N）ha−1yr− 1对一系列土壤性质和微生物群落组成的影响。我们还调查了不同施肥制度下的微生物群落组成的差异是否源于底层土壤性质的差异，间接施肥或直接施肥导致的土壤性质的变化。减少施肥显着降低了表土有机碳和氮，以及植物有效磷。这显着降低了甜菜产量，但对冬小麦的影响较小。不同施肥制度对土壤微生物群落组成无显著影响。土壤性质的差异，施肥的结果是小于网站之间的差异，和微生物群落组成的差异主要是由网站解释。结果表明，长期无机肥的做法对微生物群落组成的影响不大，并支持研究表明，微生物群落组成更受有机质投入和底层土壤性质的影响。
Agricultural fertilisation increases crop yields but can cause environmental damage, thus reductions in inorganic fertiliser application have been advocated. Farmer usage of phosphate rock has declined over the last decade, which may lead to soil nutrient depletion that undermines future crop production. We investigated the long-term (55 years) effects of eight different inorganic fertiliser regimes at four sites: no phosphorous and potassium (PK) fertilisation or annual replacement of harvested PK, combined with 0, 50, 100, or 150 kg nitrogen (N) ha−1yr−1on a range of soil properties and microbial community composition. We also investigated whether differences in microbial community composition under different fertiliser regimes arose from differences in underlying soil properties, changes in soil properties resulting indirectly from fertilisation, or directly from fertilisation. Reduced fertiliser application significantly reduced topsoil organic carbon and N, as well as plant-available P. This significantly reduced sugar beet yields but had less impact on winter wheat. The different fertiliser regimes had no significant effect on microbial community composition. Differences in soil properties as a result of fertilisation were less than differences between sites, and differences in microbial community composition were mainly explained by site. The results show that long-term inorganic fertiliser practices have little impact on microbial community composition, and lend support to research showing that microbial community composition is more influenced by organic matter inputs and underlying soil properties.