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本文就磷肥施用于一种作物或花生—小麦轮作中的两种作物后,磷肥施用量对作物产量,Olsen可提取磷(有效磷)的吸收、积累、消耗及磷肥回收的影响进行了探讨。试验在半干旱有灌溉条件的土壤上做了6年试验,结果表明,花生对直接施磷、残留磷及磷分施的肥料效应较小且不稳定,而小麦在所有年份中都有较大且稳定的磷肥效应。磷肥直接施用于小麦很有效,直接施磷13、26、39公斤/公顷,小麦平均产量分别增加35％、50％和54％,以每公顷施磷26公斤的经济效益最好。该试验在印度Punjab农业大学研究农场的砂壤土上进行,土壤PH值8.7,有机质含量0.38％,(按Olsen法提取)每公顷土壤有效磷含量为11.6
In this paper, the effect of P application on crop yield, absorption, accumulation, consumption of Olsen extractable phosphorus (P available) and phosphate recovery was discussed after phosphate fertilizer was applied to two crops in a crop or peanut-wheat rotation. A six-year trial on semi-arid irrigated soil showed that the fertilizer effect of peanut on direct phosphorus, residual phosphorus, and phosphorus fertilization was small and unstable, whereas wheat had a larger average in all years And stable phosphate fertilizer effect. The direct application of phosphate fertilizer to wheat was very effective. Phosphorus fertilizer was applied directly at 13, 26 and 39 kg / ha. The average yield of wheat increased 35%, 50% and 54% respectively. The economic benefit of applying 26 kg phosphorus per hectare was the best. The test was conducted on sandy loam soil from a research farm at Punjab Agricultural University in India with a soil pH of 8.7 and an organic matter content of 0.38%. The available phosphorus content per hectare (by Olsen method) was 11.6