摘要
本文在盆栽试验条件下,研究了水稻土供钾状况与几个热力学参数的关系。结果表明:土壤钾位势缓冲容量(PBC^k)、平衡活度比(AR_o^k)、钾位(Z)及钾离子在土壤中的扩散系数(D_k)单独使用难以说明水稻土供钾状况,但PBC^k、Z及D^k在衡量水稻土供钾状况时有相互补充的作用。活性钾(-△K_o)能较好地反映水稻土供钾状况。 PBC^k与土壤阳离子交换量(C·E·C)呈显著正相关,因而PBC^k可能与土壤胶体表面的电荷性质及密度有关。
Pot experiments were conducted to study the interaction between the state of supplying P to paddy soil and thermodynamic parameters.Results showed that it is difficult to explain the state of supplying PBC^k, or AR_(o)~k, or Z or DK to paddy soil, while PBC^k, Z and DK could supplement each other. The-△Ko could be used to explain the state of supplying P to paddy soil successfully.
出处
《吉林农业大学学报》
CAS
CSCD
1990年第1期46-49,共4页
Journal of Jilin Agricultural University
关键词
水稻土
热力学参数
供钾状况
paddy soil, thermodynamic parameters, the state of supplying P
