小麦种子中磷锌比与对缺磷敏感性关系的研究

应用中子活化分析（Ｎｅｕｔｒｏｎ Ａｃｔｉｖａｔｉｏｎ Ａｎａｌｙｓｉｓ）和磷钼蓝的比色法，分析了不同品系小麦种子中的锌和磷的含量。从种子中的Ｐ／Ｚｎ比，分析了不同品系小麦之间对缺乏磷肥反应的敏感性关系。实验证明了１８个不同品种小麦对缺磷有不同的敏感性，其中８０－５５品系小麦对缺磷最为敏感，其种子中的Ｐ／Ｚｎ比为６３：１。从分析结果发现小麦种子中的Ｐ／Ｚｎ比有两种类型，即１２８：１和６６：１。Ｐ／

Studies on the Relationship between the P/Zn Ratio in the Seeds and Phosphate Deficiency Sensitivity of Wheat

Using the technique of neutron activiation analysis and the phosphomolybolate colorimatric method,zinc and phosphorus content in the seeds of different lines of wheat were an- alyzed. By comparing the P/Zn ratio in the seeds, the effect of the sensitivity of wheat toward phosphate fertilizer deficiency was analyzed among different wheat lines. Results showed that the 18 wheat lines differed in their sensitivity toward phosphate deficiency, among them wheat line (80-85) was most sensitive and the P/Zn ratio in the seeds was 63:1. According to the results there were two types of P/Zn ratio in the seeds among the 18 lines, one type was approximately 128:1 and the other type was approximately 66:1. The wheat lines which had lower P/Zn ra tio were more sensitive and those which had higher P/Zn ratio were less sensitive toward P defi ciency, also inferring that the seeds with high P/Zn ratio might be sensitive to zinc deficiency. There fore in breeding new wheat lines resistant to low phosphate or resistant to low zinc and during selecting sorces of germ plasm, the P/Zn ratio of the seed could be a physiological indica tion.