中后期施氮肥对小麦籽粒产量和蛋白质含量的影响

STUDIES ON INFLUENCE OF LATE STAGE APPLICATION OF FERTILIZER UPON WHEAT YIELD AND PROTEIN

采用不同的追肥量和追肥期对小麦产量及品质进行研究表明,氮肥施用量对小麦的籽粒产量和蛋白质含量有明显的调控作用。不同施肥期比较,药隔期施氮对产量影响较大,扬花期施氮则对籽粒蛋白质含量效益显著。不同施氮量比较,在亩施0～20kg 的不同处理中,施氮量对籽粒产量的影响为:0～12.5kg 纯氮以内.随施氮增加,籽粒产量增加。超过12.5kg,则随施氮增加,籽粒产量下降。籽粒蛋白质含量在亩施纯氮0～17.5kg 的范围内,呈上升趋势,超过17.5kg,则随施氮增加而下降。

Two Varieties Jing Hua No.3(a variety with high protein conte-nt)and Lai Nong 8342((?)nal)were grown in fields in order tostudy the influence of applicating Nitrogen fertilizer on wheat grainyield and grain protein contentThe grain yield was tbe highest in the treatment with pure N12.5 Kilos jin per mu.The grain yielc decreased with increasing thethe Nitrogen fertilizer,while the grain protein content increased.Thegrain protein content was the highest in the treatment with puie N17.5kilos per mu.The protein content was higher when applicatingNitrogen fertilizer in anthesis stage than anther cell for mation stage,while wheat yield was higher in anther cell for mation stage than inanthesis stage.