硫氮配施对强筋小麦豫麦34籽粒灌浆特性的影响

为对硫肥和氮肥合理配施提供参考依据，2003-2005年在大田条件下以强筋小麦豫麦34为试验材料。采用Logistic方程拟合其籽粒灌浆过程并计算有关籽粒灌浆参数，探讨了硫氮配施对强筋小麦籽粒灌浆特性的影响。结果表明，在硫氮配施条件下，强筋小麦籽粒灌浆进程呈“慢～快～慢”的S型曲线。Logistic方程决定系数均大于0＋9981，达到极显著水平，拟合效果良好；在相同施氮水平下，最大灌浆速率到达时间（L）、千粒重潜力值（K）、最大灌浆速率（Vm）、平均灌浆速率（Va）和灌浆持续时间（T）等灌浆参数随硫肥施用量的变化而有差异。适宜的硫氮配施可提高K、Vm和Va，且T随施硫量的增加而延长。

Effect of Sulfur and Nitrogen Fertilizer Combined Application on Grain Filling Characteristics of Wheat Yumai 34 with High Gluten

Under field conditions,changes of grain filling of high-gluten winter wheat cultivar Yumai 34 were studied in Zhengzhou experimental site in Henan during the 2003~2004 and 2004~2005 growing seasons,which aimed at understanding the effect of sulfur and nitrogen fertilizers combined application on grain filling.Grain filling course was imitated by logistic equation,and the specific property of grain filling was analyzed by T test.The result indicated that under sulfur and nitrogen fertilizers combined application conditions,the process of grain filling was S curve,The logistic equation was at significant level(R~2>0.9981).There were variance among average filling rate(V_a),filling duration time(T) and biggest filling rate(V_m) in different treatments.Sulfur and nitrogen combined application could improve K,V_m,V_a,and extend T.