Effect of long-term combined application of organic and inorganic fertilizers on soil nematode communities within aggregates
文献类型： 外文期刊
作者： Zhang, Zhiyong 1 ; Zhang, Xiaoke 1 ; Mahamood, Md. 1 ; Zhang, Shuiqing 3 ; Huang, Shaomin 3 ; Liang, Wenju 1 ;
作者机构： 1.Chinese Acad Sci, Inst Appl Ecol, Liaoning Key Lab Soil Environm Qual & Agroprod Sa, Shenyang 110016, Peoples R China
2.Shenyang Agr Univ, Coll Land & Environm, Shenyang 110161, Peoples R China
3.Henan Acad Agr Sci, Inst Plant Nutr & Environm Resources Sci, Zhengzhou 450002, Peoples R China
期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）
ISSN： 2045-2322
年卷期： 2016 年 6 卷
页码：
收录情况： SCI
摘要： A long-term fertilization experiment was conducted to examine the effects of different fertilization practices on nematode community composition within aggregates in a wheat-maize rotation system. The study was a randomized complete block design with three replicates. The experiment involved the following four treatments: no fertilizer, inorganic N, P and K fertilizer (NPK), NPK plus manure (NPKM) and NPK plus maize straw (NPKS). Soil samples were taken at 0-20 cm depth during the wheat harvest stage. Based on our results, NPKS contributed to soil aggregation and moisture retention, with a positive effect on soil total nitrogen accumulation, particularly within small macroaggregates (0.25-1 mm) and microaggregates (< 0.25 mm). The C/N ratio was correlated to the distribution of the soil nematode community. Both manure application and straw incorporation increased the nematode functional metabolic footprints within all aggregates. Additionally, the functional metabolic footprints decreased with a decline in aggregate size. The accumulation of total nitrogen within < 1 mm aggregates under NPKS might play a key role in maintaining the survival of soil nematodes. In our study, both crop straw incorporation and inorganic fertilizer application effectively improved soil physicochemical properties and were also beneficial for nematode survival within small aggregate size fractions.
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