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施用磷肥的适宜时期是秋季。以河套平原为例,这里主要是盐碱土,在这类土壤中施用磷肥,随水流动性很小,会很快被土壤固定,经土壤微生物的活动,逐步成为植物可以吸收的状态。同时,磷肥施在土壤中有较长时期的肥效,据测定,过磷酸钙施入土壤中,当年仅可供给植物吸收50%。临河县农科所1975年在城关公社
The proper period of application of phosphate fertilizer is autumn. Take the Hetao plain as an example, here is mainly saline-alkali soil. Phosphate fertilizer is applied in this kind of soil. With little water mobility, it will be quickly fixed by the soil. After being activated by soil microorganisms, it gradually becomes a state that plants can absorb. At the same time, the application of phosphate fertilizer in the soil has a longer period of fertilizer, it was determined that the application of superphosphate in soil, which can only provide plants to absorb 50%. Linhe County Agricultural Institute in 1975 in the city of communes