水土保持学报2017，Vol.31Issue(4)：127-134,190,9.DOI:10.13870/j.cnki.stbcxb.2017.04.021
地面覆盖对核桃园土壤团聚体分布及其化学计量特征的影响
Effects of Mulching on Soil Aggregate Distribution and Stoichiometry in Walnut Orchard
摘要
Abstract
To confirm the effects of mulching on soil aggregate characteristics,the distribution of microaggregate and macro-aggregate and also stoichiometry of macro-aggregate were explored.In the 20-40 cm soil layer mulched with manure,the percentage of the 10～150 μm micro-aggregate was 84.5％,which was 3.7％ higher than control,while the percentages of the 1～5 mm macro-aggregate and the ＞5 mm macroaggregate were 47.74％ and 33.04％,respectively,and the corresponding changes were 56.8％ and 49.5％ compared with control.In the 0-20 cm soil layer,total N,total P,TOC of all soil aggregates mulched with manure were,on average,1.04,0.81 and 14.39 g/kg,respectively,which were 2.9,5.1,1.4 times that measured in control,and the corresponding values under treatment with wood chips were 0.61,0.32,and 7.42 g/kg,respectively,which were 1.7,1.0,2.3 times that measured in control.The C/N,C/P,N/P ranges of soil aggregate mulched with manure were 8.29～22.65,4.45～27.18 and 0.44～1.89,respectively,and the ranges of that of wood chips were 4.09～29.60,5.32～59.88 and 1.04～3.29,respectively,while the control were 4.71～12.24,10.08～25.42 and 0.86～3.10,respectively.In all,mulching promotes the percentage of the 1～5 mm macro-aggregate and weaken the ＞5 mm macro-aggregate and micro-aggregate.Moreover,the total N,P,TOC and C/N,C/P of the soil aggregates were all increased in degree with muchling.关键词
地面覆盖/核桃园/土壤团聚体/化学计量特征Key words
mulching/walnut/soil aggregates/stoichiometry分类
农业科技引用本文复制引用
孙萌,梁曼曼,李寒,李保国,齐国辉,张雪梅..地面覆盖对核桃园土壤团聚体分布及其化学计量特征的影响[J].水土保持学报,2017,31(4):127-134,190,9.基金项目
国家林业行业公益专项(201504408) （201504408）
河北省科技支撑计划项目(16236810D) （16236810D）
