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本试验采用适应高磷肥沃土壤的东北大豆品种，适应浙江低丘红壤的耐低磷品种浙春２以及原产我国华南低磷土壤的广东当地品种为材料，对不同来源品种的耐低磷能力进行了评价。试验在缺磷红壤中进行，施磷分别为０，２．５和５ｇ／盆，每盆２．５ｋｇ土。试验结果表明，不同地理来源的品种对低磷土耐性明显不同。东北品种明显不耐低磷，而浙春２和一些广东品种对低磷或中等磷水平土壤适应性较好。广州中粒春豆地上和地下干物重在不同处理均最高，而且随磷施用量增加而增高。浙春２、梅州春豆和南雄黄豆在２．５ｇ磷水平时，根干重就达最高值，而地上干重也达５ｇ水平的９０％以上，说明这些品种较耐低磷。株高、地上和地下干物重在低磷水平下相关都达极显著水平，说明这几个性状都可作为鉴定大豆品种耐低磷的指标。在低磷情况下大豆叶质重增重。高耐低磷和中等耐性的品种都是在２．５ｇ磷水平时光合速率最高，这与不耐低磷品种是不同的。耐低磷能力与叶温、叶室温度以及蒸腾速率无关。
In this study, we used the Northeast soybean varieties adapted to fertile soil with high P and adapted to Zhejiang low-phosphorus cultivars Zhechun 2 and native Guangdong native low-phosphorus soils in Zhejiang Province for their low phosphorus tolerance did an evaluation. The experiment was carried out in red phosphorus-deficient soil with phosphorus rates of 0, 2.5 and 5 g / pot, 2.5 kg of soil per pot. The test results show that different geographical origin of the varieties of phosphorus tolerance significantly different. Northeast cultivars were significantly impatient with low P, while Zhechun 2 and some Guangdong cultivars had better adaptability to low P or medium P levels. Guangzhou medium grain spring beans on the ground and underground dry weight in different treatments are the highest, and with the increase of phosphorus application increased. Zhechun 2, Meizhou spring beans and Nanxiong soybean at the level of 2.5g phosphorus, root dry weight reached the highest value, while the dry weight of the ground reached 5% above 90%, indicating that these varieties are more resistant to low phosphorus. Plant height, aboveground and underground dry matter weight at low phosphorus levels are extremely significant correlation, indicating that these traits can be used as identification of soybean varieties resistant to low phosphorus indicators. Soybean leaves weight gain under low phosphorus conditions. The cultivars with high tolerance to low and moderate tolerance had the highest photosynthetic rate at 2.5 g phosphorus level, which was different from those with low phosphorus tolerance. Phosphorus tolerance was independent of leaf temperature, leaf compartment temperature and transpiration rate.