论文部分内容阅读
土壤有效磷通常指可资植物吸收的土壤磷部分。它的来源和形态至今尚无定论。我们采用浙江省分布较广,其肴代表性的4种土壤即青紫泥、泥质田、黄筋泥和黄筋泥田进行黑麦盆栽试验,结合室内分析,研究了一定供磷强度下植物吸收磷和解吸磷的关系,以期探讨土壤中植物有效磷的来源及其形态。盆栽试验的磷肥用量根据4种土壤吸附等温线计算,分别相应于平衡溶液中磷浓度(供磷强度)为0,0.1,0.2,0.3,0.4,0.5 ppm P时的吸附量,
Soil available phosphorus usually refers to the plant can absorb the phosphorus part of the soil. Its origin and form are still inconclusive. We use Zhejiang Province, the wider distribution of its representative four kinds of soil that purple soil, muddy field, yellow tendon mud and yellow soil paddy field rye pot experiments, combined with indoor analysis of the plant for a certain phosphorus supply intensity of absorption Phosphorus and desorption of phosphorus in order to explore the source of soil available phosphorus and its morphology. The amount of phosphate fertilizer in pot experiment was calculated according to four kinds of soil adsorption isotherms, corresponding to the adsorption amounts of phosphorus (0,0.1,0.2,0.3,0.4,0.5 ppm P) in the equilibrium solution, respectively,