Effects of organic-inorganic compound fertilizer with reduced chemical fertilizer application on crop yields, soil biological activity and bacterial community structure in a rice-wheat cropping system
Effects of organic-inorganic compound fertilizer with reduced chemical fertilizer application on crop yields, soil biological activity and bacterial community structure in a rice-wheat cropping system
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DOI：
10.1016/j.apsoil.2015.11.006
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发表时间：
2016-03-01
影响因子：
4.8
通讯作者：
Shen, Qirong
中科院分区：
文献类型：
--
作者：
Zhao, Jun;Ni, Tian;Shen, Qirong
近年来，发展更稳定、更可持续的农业生态系统以提高粮食产量引起了公众的广泛关注。通过田间试验，研究了减量化肥配施猪粪有机无机复合肥对稻麦两季(稻麦两季)作物产量、土壤理化性质、生物活性和细菌群落结构的影响。结果表明，在所有取样时间内，该施肥方案都提高了土壤养分有效性、微生物生物量、酶活性和土壤氮素过程，并在一定程度上提高了作物产量。在所有土壤样本中，细菌群落在门水平上以变形杆菌、酸性细菌和氯杆菌为主。基于加权UniFrac距离的系统聚类分析表明，小麦收获土壤中细菌群落结构受采样时间和处理的影响较大。共享OTUS的Venn图显示了不同处理和采样时间的核心微生物群，其中每个丰富的门(纲)的相对丰度在不同处理和不同采样时间下是稳定的。在有机-无机复合肥处理下，α蛋白细菌、伽玛蛋白细菌、硝化细菌、拟杆菌和放线菌的相对丰度显著增加，表明土壤的硝化作用和有机质周转等功能可能得到加强。综上所述，有机-无机复合肥的应用可以减少化肥的使用，提高农业生态系统的长期生产力和可持续性。(C)2015爱思唯尔B.V.保留所有权利。
The development of more stable and sustainable agroecosystems for improving food production has caused wide public concern in recent years. In the present study, we conducted a field experiment to investigate the effect of pig manure organic-inorganic compound fertilizer with reduced chemical fertilizer on the crop yields, soil physicochemical properties, biological activities and bacterial community structure in a rice-wheat cropping system over two crop seasons (rice and wheat). The results showed that at all sampling times, this fertilizer regime enhanced the soil nutrient availability, microbial biomass, enzymatic activities, and soil nitrogen processes and, to some extent, promoted crop yields. Across all soil samples, bacterial communities were dominated by Proteobacteria, Acidobacteria, and Chloroflexi at the phylum level. Hierarchical cluster analysis based on the weighted UniFrac distance revealed that the bacterial community structures were strongly separated by the sampling time, and the treatments in the wheat harvest soils. A Venn diagram of shared OTUs showed a core microbiome across different treatments and sampling times, in which the relative abundance of each abundant phylum (class) was stable in the different treatments and at different sampling times. Specifically, the relative abundance of Alphaproteobacteria, Gammaproteobacteria, Nitrospirae, Bacteroidetes, and Actinobacteria was largely and particularly enriched under the organic-inorganic compound fertilizer regime, indicating that soil functions, such as nitrification and the turnover of organic matter, might be strengthened under this treatment. Collectively, these results indicate that the application of organic-inorganic compound fertilizer may reduce chemical fertilizer use and improve the long-term productivity and sustainability of agroecosystems. (C) 2015 Elsevier B.V. All rights reserved.