灌水对强筋小麦氮素代谢及产量的影响

Effects of Irrigation on Nitrogen Metabolism and Yield of Strong Gluten Wheat

[目的]为强筋小麦高产优质栽培的田间水分管理提供参考依据。[方法]在大田条件下,研究了灌水次数对强筋小麦郑麦9023氮代谢及产量的影响。[结果]增加灌水次数能够提高旗叶NR活性、叶绿素和氮素含量,在灌浆盛期灌水处理具有明显优势。籽粒蛋白质含量随灌浆进程呈V形变化,随灌水次数增加,蛋白质含量降低,在灌浆中前期不同处理间差异较大,而在灌浆后期差异变小。籽粒产量随灌水次数增多而增加,而籽粒蛋白质含量却降低,籽粒蛋白质产量与籽粒产量表现相同趋势。[结论]适当增加灌水次数。

[Ojective]The aim was to provide reference for the field irrigation management of high yield and quality cultivation ot strong gluten wheat.[Method]Under field conditions,the effects of irrigation times on nitrogen metabolism and yield of strong gluten wheat 9023 were studied.[Result]The results indicated that NR activity,chlorophyll and nitrogen content in flag leaf increased with irrigation times increasing, and the irrigation treatment had obvious advantages during middle filling stage.Grain protein content showed＂V＂type change with grain filling going on,and protein content decreased when irrigation times increased.There was significant difference among treatments during early stage of grain filling,and the difference became smaller in the late grain filling stage.The grain yield and protein yield increased but the protein content decreased with increase of irrigation times.[Conclusion]Increasing irrigation times properly could improve grain yield and protein yield per unit area,but reduce the grain protein content.