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利用温室盆栽试验，对不同磷效率小麦基因型进行了磷素营养阈值的研究。结果表明，磷低效基因型对缺磷反应敏感，在不施或施磷量较低时，籽粒产量及生物量均较低，随着施磷量增加，产量缓慢增加，表现出对磷肥效应较迟钝的现象。而磷高效小麦基因型在不施磷肥或施磷量较低条件下的产量与生物量相对较高，表现出明显的耐低磷特性及对土壤难溶性磷的高效活化、吸收能力。且随着施磷量增加，磷高效基因型的产量急剧增加，达到一定水平后产量保持稳定，而磷低效基因型则表现为在施磷范围内产量呈报酬递减的持续增加趋势。根据产量结果计算求得，磷高效小麦基因型的需磷阈值相对较低，而磷低效基因型小麦的需磷阈值相对较高，如苗期磷低效的 ８０５５ 为 ０．５０％ ，而磷高效的洛夫林和冀 ８７４６１７ 分别为０． ４５％ 或 ０． ４６％ ； 开花期 ８０５５ 为 ０． ２５２％ ， 而洛 夫林 和冀 ８７４６１７ 分 别为 ０． ２３％ 和０．２２５％ 。充分说明了磷高效小麦基因型对土壤与肥料磷有较高的吸收、利用潜力，获得小麦最高产量的需磷量较低，而磷低效小麦基因型获得最高产量的需磷量相对较高。从而为确定磷肥的合理施用原则提供理论依据。
Pot experiments were conducted to study the phosphorus nutrition threshold of different P-efficient wheat genotypes. The results showed that the phosphorus inefficient genotype was sensitive to phosphorus deficiency, and the yield and biomass of grain were lower with or without phosphorus application. With the increase of phosphorus application, the yield increased slowly, showing the effect of phosphate fertilizer Slower phenomenon. Phosphorus-efficient wheat genotypes had relatively high yield and biomass under the condition of no phosphate fertilizer application or low phosphorus application rate, showing obvious resistance to low-phosphorus and high-efficiency activation and absorption of soil-insoluble phosphorus. With the increase of phosphorus application, the yield of P efficient genotypes increased sharply. After reaching a certain level, the yield remained stable, while the phosphorus inefficient genotype showed a decreasing trend of increasing returns in the range of phosphorus application. Phosphorus-efficient wheat genotypes had a relatively low phosphorus demand threshold based on the yield results, while the phosphorus-demanding thresholds for phosphorus-poor genotype wheat were relatively high. For example, 80-55 for phosphorus inefficiency at seedling stage was 0.50% , While the phosphorus efficient Lovrin and Ji 87 4617 were 0. 45% or 0. 46%; flowering 80 55 as 0. 252%, while Lovrin and Ji 87 4617 were 0. 23% and 0.225%. It is fully demonstrated that phosphorus-efficient wheat genotype has higher absorption and utilization potential of phosphorus in soil and fertilizer, and has a lower phosphorus demand for obtaining the highest yield of wheat. However, the phosphorus demand of the highest yield of phosphorus-inefficient wheat genotype is relatively high . So as to determine the rational application of phosphate fertilizer principles provide a theoretical basis.