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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。
In view of the fact that the soil itself has the property of adsorbing and fixing nutrient ions and reducing the availability of nutrients, the adsorption and fixation ability of nutrient ions in two kinds of soils in Xinjiang was studied by using the soil nutrient status system research method. The results showed that the adsorption capacity of P, Zn and Cu in brown desert soil was stronger than that of the fluvo-aquic soil, while the adsorption and fixation of K, B and Mn in the two soils were not significant. The limiting nutrient of brown desert soil was N> P> Mn > B, nutrient limit of soil is N> Mn> P> K. Therefore, fertilization should take into account the ability of soil to adsorb nutrient ions and determine the proper fertilization rate.