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1984～1986年对黔东114个低产田187个土样分析结果表明,缺磷是黔东多数低产田的普遍现象。全磷平均含量为444ppm,仅达中科院土壤所提出的440ppm界线值。其中各低产田类型中除石灰岩风化物和河流冲积物发育的水稻土外,全磷含量均在500ppm以下,有76％的土样平均全磷含量低于这个界线值;而且低产田全磷中无效形态占50％以上,其中有效性较高的铝磷含量很少(1～8％),有效性较低的钙磷含量却较高,只有铁磷占的比例较高,且具供磷能力;低产田施磷后一个月,大部分转化为铁磷、铝磷和钙磷,其中一部分已转化为水稻不能利用的闭蓄态磷。
Analysis of 187 soil samples from 114 low-yield fields in eastern Guizhou Province from 1984 to 1986 showed that phosphorus deficiency was the common phenomenon in most low-yield fields in eastern Guizhou. The average total phosphorus content of 444ppm, only the soil of the Chinese Academy of Sciences proposed 440ppm boundary value. Among all low-yielding field types, total phosphorus was less than 500ppm, except for paddy soil with limestone weathering and river alluvium, and 76% soil samples contained less than the total phosphorus content. In addition, Accounting for more than 50%, among which the effective Al-P content is very low (1 ~ 8%), the less effective Ca-P content is higher, only the proportion of iron and phosphorus accounts for a higher proportion, A month after the low-yielding field application of phosphorus, the majority was transformed into Fe, Al, P and Ca, some of which had been converted into closed-storage phosphorus that rice could not utilize.