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2 各粒级团聚体组成与土壤团聚体平均重量直径的相关系数

Table 2 Correlation coefficient between the mean weight diameter and composition of soil aggregates size

土层 Soil depth (cm) >2 mm 2-0.25 mm 0.25-0.053 mm <0.053 mm 0-20 0.984** 0.485 -0.908** -0.854* 20-40 0.992** 0.337 -0.920** -0.852* 40-60 0.930** 0.772* -0.827* -0.915**