摘要
研究了津沱河流域3个土类（含6个亚类）的磷酸吸收系数（PAC），以磷酸吸收系数作为土壤吸磷强度指标。结果表明，各类土壤的吸磷强度差异很大，山地土壤小于平原土壤；棕壤小于褐土，褐土小于潮土；从剖面层次看，同一类型土壤表层土壤的PAC较其它层次大。相关分析、回归分析表明，影响滹佗河流域土壤PAC的主要因素是＜0.01mm土粒（物理粘粒）含量，其次为CaCO3含量。根据目标产量，作物从土壤中携走的磷量，参考全国化肥网的试验结果，本文建议以PAC的0．4％作为“维持”施磷量计算参数。
This paper deals with the intensity of phosphorus absorption in the different soils ofthree great groups (including six subgroups) and the soils were collected from Hutuo riverbasin. The results showed chao soils phosphate abeding coeffient (PAC) > drab soil's >brown earth' s. PAC has positive significant correlation with the content of < 0. 01mm soilgrain (physical clay), the second is the content of CaCO3. Except brown earth, the PAC ofcalcareous soils on Hutuo river basin has positive significant correlation with the content of < 0.01mm soil grain. P absorption has significant correlation with P desorption. It is suitable forthe amount of phosphaticfertilizer to take PAC 0. 4 %.
出处
《河北农业大学学报》
CAS
CSCD
北大核心
1998年第4期38-43,共6页
Journal of Hebei Agricultural University
关键词
土壤
吸磷强度
施磷量
Soils of Hutuo river basin
Intensity of phosphorus absorption
Amount of phosphatic fertilizer
