Responses of Soil Aggregates to Manure Application:A Meta-analysis
Manure application can affect the formation and stability of soil aggregates by increasing the amount of organic matter and nutrients in soil.Most studies found that manure application increased the proportion of soil marcoaggregates(≥0.25 mm).However,there are significant differences among studies in the results that manure application affect large marcoaggregates(>2 mm)more or small marcoaggregates(2-0.25 mm).A Meta-analysis based on 36 studies with 267 aggregate data was conducted and found that manure application significantly increased the proportion of soil large macroaggregates and small marcoaggregate by 95%and 17%,respectively.At the same time,it reduced the proportion of soil microaggregates(0.25-0.053 mm)and silt-plus and clay-size particles(<0.053 mm)by 14%and 20%,respectively.What's more,Meta-regression analyze found that soil types and pH,manure types,annual temperature,and annual rainfall are the main factors affecting the responses of soil aggregates to manure application.
万方数据
维普
