P·Zn组合对小麦生长·产量和籽粒含氮量的影响

[目的]探讨P、Zn组合对小麦生长的影响机理。[方法]采用盆栽试验，研究砂姜黑土中P、Zn配施对小麦生长期产量以及籽粒氮素含量的影响。[结果]结果表明，小麦苗期和抽穗期P、Zn呈协同关系，成熟期明显出现P、Zn拮抗。适当的P、Zn配比有利于小麦籽粒产量的提高和经济效益的增加。P0.3Zn0.2处理的产量最高，与其他处理间在0．05水平有差异，P0.3Zn0.4、P0.3Zn0.2、P0.9Zn0.4间的产量在0．05水平无差异，Zn0处理的产量最低。[结论]低P背景下，施盈肥能促进小麦根系的生长；高P背景下，施适量历肥能促进小麦根系生长，但高Zn时出现P、Zn拮抗。

Effects of P and Zn Combination on the Growth, Yield and Kernel Nitrogen Content of Wheat

[Objective]The research aimed to discuss the influence mechanism of P and Zn on the growth of wheat.[Method] Pot experiment was used to study the effects of P and Zn combination on the growth,yield and kernel nitrogen content of wheat in lime concretion black soils.[Result]In seedling stage and earing time of wheat,P and Zn showed synergic relationship.In mature period P and Zn showed rivalry relationship.Suitable P and Zn allocated proportion was advantageous to the wheat grain output enhancement and economic efficiency increase.The processing of P0.3Zn0.2 output was highest,achieved the 0.05 level difference.The processing of P0.3Zn0.4,P0.9 Zn0.2 and P0.9 Zn0.4 volume variance was not remarkable,the processing of Zn0 output was lowest.[Conclusion]Under the environment of low P concentration in soil,Zn application could promote the growth of wheat root system.Under the environment of high P concentration,suitable Zn application could promote the growth of wheat root system,while too much Zn application could induce the rivalry of P and Zn.