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对沈阳地区棕壤定位试验地各施肥处理土壤按Hed ley等建议的分级方法进行测定。结果表明,棕壤磷中残留态含量最高,无机磷主要以NaOH-P i和HC l-P i形态存在,有机磷主要以NaOH-Po形态存在,NaHCO3-Po在各组分中所占比例最小。施用有机肥能明显增加潜在活性有机磷(NaOH-Po)的数量。1.0mol L-1HC l浸提的Ca-P i存在着缓慢的动态转化过程,是棕壤中的潜在磷源。
Soil fertilization in brown locating experiments in Shenyang was conducted according to Hedley’s recommended grading method. The results showed that the content of residual phosphorus in brown soil was the highest. The inorganic phosphorus mainly existed in the form of NaOH-P i and HC l -P i. The organic phosphorus mainly existed in the form of NaOH-Po. The content of NaHCO 3 -P o in each component was the smallest. Application of organic fertilizer can significantly increase the number of potentially active organophosphorus (NaOH-Po). The Ca-P i extracted by 1.0 mol L-1HC l had a slow dynamic transformation and was a potential phosphorus source in brown soil.