[Relationships between water-stable aggregates and nutrient status in black soil after reclamation].
The study on the dynamics of water-stable aggregates in black soil after reclamation and its relation to soil nutrient status showed that the contents of soil water-stable aggregates decreased significantly at initial reclamation stage, but the declining became small with time. > 0.25 mm water-stable aggregates had a significant correlation with soil organic C, total N, total P and CEC, the correlation coefficients being 0.7625, 0.6794, 0.6084 and 0.8134, respectively, and also had a significant correlation with soil exchangeable Ca, Mg, K, Na. A closer relationship of the aggregates was found with soil organic C and CEC than with other fertility properties, while no evident correlation existed between the aggregates and soil total K, available P, available K and slow-release K. In order to maintain a good aggregate structure of black soil, it is of most importance to concern a proper balance of soil organic C.
Yu
Wantai
W
Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China. wtyu@iae.ac.cn
Shen
Shanmin
S
Zhang
Lu
L
Ma
Qiang
Q
Zhao
Shaohua
S
D002244:Carbon / Q000032:analysis*; D002681:China; D018556:Crops, Agricultural / Q000254:growth & development*; D017753:Ecosystem; D009584:Nitrogen / Q000032:analysis*; D009930:Organic Chemicals / Q000032:analysis; D010758:Phosphorus / Q000032:analysis; D012987:Soil / Q000032:analysis*; D014867:Water / Q000032:analysis*
D009930:Organic Chemicals; D012987:Soil; D014867:Water; D010758:Phosphorus; D002244:Carbon; D009584:Nitrogen