黑土旱地改稻田土壤水稳性团聚体有机碳和全氮的变化特征

马原,迟美静,张玉玲,范庆峰,虞娜,邹洪涛

Change Characteristics of Organic Carbon and Total Nitrogen in Water-Stable Aggregate After Conversion from Upland to Paddy Field in Black Soil

Yuan MA,MeiJing CHI,YuLing ZHANG,QingFeng FAN,Na YU,HongTao ZOU

表4 各粒级团聚体有机碳、全氮含量与各粒级土壤团聚体的相关系数

Table 4 Correlation coefficients of OC and TN contents and composition of soil aggregate size

土层 Soil depth (cm) >2 mm 2-0.25 mm 0.25-0.053 mm <0.053 mm OC TN OC TN OC TN OC TN 0-20 0.933** 0.969** 0.788* 0.882** 0.454 0.460 0.483 0.602 20-40 0.988** 0.853* 0.681 0.626 -0.010 -0.087 0.706 0.821* 40-60 0.868* 0.885** 0.267 0.285 0.913** 0.732 0.709 0.843*