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这篇报告是关于在红壤荒地上施用了不同产地磷矿粉以后的长期效果。试验是在江西甘家山红壤荒地上进行的。试验地是强酸性(pH 5.0)红壤,质地为壤粘土,在1956年冬施有每亩200斤的石灰。在每季作物播种时,都施有充分的氮肥。试验是在1/20亩的小区上用三次重复进行的。各项磷矿粉在1956年冬季播种小麦时施用—次,用量为每亩150斤,过磷酸钙及骨粉每亩用量为40厅。以后各季作物都没有追加磷肥。现在把各项磷肥对三季作物的肥效,列表如下:第一次作物为小麦,是吸收磷肥性能极弱的作物。这里可以看出,凤台磷矿粉的肥效最速,对小麦来讲,约相当于过磷酸钙的45—63％之间,昆阳、峨嵋次之,遵义又次之,海州磷矿粉最难分解。
This report is about the long-term effects of applying different sources of phosphate rock on red soil wastelands. The experiment was conducted on the wasteland of red soil in Ganjiashan in Jiangxi Province. The test was a strongly acidic (pH 5.0) red soil of loamy soil with 200 kg / acre of lime applied in the winter of 1956. In the sowing of crops each season, are full of nitrogen fertilizer. The test was repeated three times over a plot of 1/20 acres. Each phosphate rock was applied in wheat sowing in the winter of 1956 - times, with an amount of 150 kg per acre and a dosage of 40 ha per acre for superphosphate and bone meal. After all the crops are not additional phosphate fertilizer. Now the effect of various phosphate fertilizers on the three-season crops is tabulated as follows: The first crop is wheat, which is a crop that absorbs extremely poor performance of phosphate fertilizers. Here we can see that Fengtai phosphate rock powder the most effective, the wheat is concerned, about the equivalent of 45-63% of superphosphate, Kunyang, Emei second, followed by Zunyi, Haizhou phosphate rock powder The most difficult to break down.