摘要
本研究利用田间试验,探讨了套种豆科绿肥对土壤养分、团聚性及其有机碳和全氮分布的影响。结果表明,与空白相比,套种豆科绿肥对玉米产量、土壤容重、孔隙度、全量氮磷钾、有效氮钾及有机碳均无显著影响;有效磷趋势为红小豆〉绿豆、空白,说明套种红小豆或可活化土壤磷;0.25~2.00 mm团聚体是占绝对优势的粒级,套种豆科绿肥能促进0.05~0.25 mm团聚体向其周转,但团聚体分布的变化并未引起土壤稳定性的明显差异;团聚体有机碳、全氮和碳氮比随团聚体粒径减小而降低,绿肥处理使团聚体有机碳和全氮呈下降趋势,其原因有待进一步探讨。总之,套种绿肥有利于磷活化及大团聚体形成,尽管引起部分粒级团聚体内有机碳和全氮下降,但未引起整土有机碳和全氮降低。因此,套种绿肥模式可继续推广应用。
Based on the located field experiment, the study investigated effects of green manure application with maize on soil nutrients, aggregation, and distributions of carbon and nitrogen. The results showed that compared with CK, applying green manure did not improve maize yield, soil bulk density, porosity, total C, N, P, and K, and available N and K, while soil available P increased （P〈 0.05 ） when the red bean was applied. The 0.25-2.00 mm aggregate size was dominant among the four aggregate sizes, and applying green manure enhanced its formation and accnmnlation, although this did not improved soil aggregate stability. Aggregate C, N and C/ N ratio decreased as aggregate size. Applying green manure reduced aggregate C and N, and the reason should be investigated further. In a word, applying green manure enhanced the available P and macroaggregate formation. Although it caused the decrease in aggregate C and N, applying green manure had no effects on the bulk soil C and N. Thus, applying green manure could be recommended.
出处
《天津农业科学》
CAS
2015年第9期44-47,56,共5页
Tianjin Agricultural Sciences
基金
河北工程大学博士专项基金项目
河南省农业科学院自主创新基金项目(2013JC19)
关键词
套种绿肥
团聚体
有机碳
全氮
applying green manure
aggregates
organic carbon
total nitrogen
作者简介
刘小粉（1985-），女，河南上蔡人，讲师，博士，主要从事土壤物理结构和特性、循环／生态农业等方面的研究。
