[The P and K concentration characteristics and their effect factors in the meadow albic bleached soil in the Sanjiang Plain].
During the growth season of wetland plant in the Sanjiang Plain, the representative meadow albic bleached soil developed in the Deyeuxia angustifolia wetland was chosen as the study objects, soil was sampled by soil layer monthly, their P and K concentration and correlative environmental factors were measured synchronously. Based on these data, with SPSS software and grey relating analyse means, this paper discussed the P and K concentration characteristics and their effect degree in the meadow albic bleached soil. The results were as following: The P and K concentration has obvious layered phenomenon in the soil profile, the correlations between P and K concentration and soil layer are remarkable, all their correlation coefficients are above 0.94. The P and K concentrations of every soil layer have an obvious seasonal dynamics in plant growth season. Their one-factor non-linear regression simulation models are suitable. The same environmental factor's affection degrees on the total P, total K, rapidly available P and rapidly available K of same layer or different layer are not same. Different environmental factor's affection degrees on same object are different also. Rainfall has the biggest affection degree in all environmental factors. The surface soil layer is more sensitive than bottom soil layer in the affection degree of environmental factors.
Department of Urban and Resources Sciences, Nanjing University, Nanjing 210093, China. he_trong@263.net
Tai-rong
TR
He
Xian-liang
XL
Li
Da-yuan
DY
Yang
Yong-xing
YX
Yang
D002681:China; D010758:Phosphorus / Q000032:analysis*; D006109:Poaceae / Q000254:growth & development*; D011188:Potassium / Q000032:analysis*; D012621:Seasons; D012987:Soil / Q000032:analysis*
D012987:Soil; D010758:Phosphorus; D011188:Potassium