春、夏两季DOP与可溶性无机磷（DIP）的形态间转化较秋、冬两季更为活跃。
The form transformation of DOP and dissolved inorganic phosphorus (DIP) was more active in spring and summer than autumn and winter.
运用新的石灰性土壤无机磷分级方法研究了冀南麦稻轮作高产区土壤无机磷的形态，水溶性磷肥施于稻季和施于麦季土壤中的转化特性。
The study on the transformation of applied phosphorus and availability of residual phosphorus in wheat rice rotation was conducted on calcareous soils for three years.
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