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我省广泛分布的湖区冲积性土壤,含有效性磷比较多,种植早稻时要不要施用磷肥?何时施用磷肥?我们于1973年对这些问题进行了试验研究,现将试验结果简报如下。
The alluvial soils in the lake area of our province are widely distributed and contain more effective phosphorus. Do we need to apply phosphate fertilizer when planting early rice? When should we use phosphate fertilizer? We conducted a pilot study on these issues in 1973, and the experimental results are summarized as follows.