土壤对养分离子吸附特性初步研究

Primary Study on Nutrient Adsorption on Soil

针对土壤本身对养分离子具有吸附固定特性降低了养分的有效性,运用土壤养分状况系统研究法通过吸附试验研究新疆两种土壤对养分离子的吸附固定能力。研究结果表明:棕漠土对P、Zn、Cu的吸附固定能力比潮土强,两种土壤对K、B和Mn吸附固定差异不显著,棕漠土的养分限制因子是N>P>Mn>B,潮土的养分限制因子是N>Mn>P>K,因此施肥时考虑到土壤对养分离子的吸附固定能力确定合理的施肥量。

Two types of soil in xinjiang were selected to investigate their nutrient adsorption capability. The result showed that the adsorption capabilities of P,Zn and Cu on the brown desert soil were greater compared with those on the fluvo - aquic soil. The difference between the capabilities of K, B and Mn adsorption on the two types of soil was not remarkble. The effect of nurtient factor for the brown desert soil was in order of N 〉 P 〉 Mn 〉 B, while that for the fluvo - aquic soil was N 〉 Mn 〉 P 〉 K. Hence, the nutrient adsorption capability of soil should be taken into account to use fertilizes reasonably.