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在等氮量条件下研究深松与施氮方式对玉米子粒灌浆特性及产量和品质的影响。结果表明,深松使玉米灌浆后期百粒重增加,隔行深松(T1)对灌浆后期百粒重的增加作用大于行行深松(T2);追氮处理最大灌浆速率(Gmax)、平均灌浆速率(G)、灌浆后期百粒重与灌浆活跃生长期(P)均大于一次性基施氮肥处理,且随追氮次数的增加灌浆后期百粒重增加;深松使Gmax增加,最大灌浆速率出现的天数(Tmax)提前,对灌浆速率的增加作用T1处理大于T2处理;各施氮处理对灌浆速率的影响表现为拔节期、灌浆期分别追施氮肥>拔节期追施氮肥>一次性基施氮肥。追氮对子粒灌浆的促进作用大于深松措施。灌浆后期百粒重与产量极显著正相关。G和Gmax与灌浆后期百粒重的相关系数较大,其他灌浆参数相关性较小。子粒蛋白质含量与产量呈极显著正相关;淀粉含量与产量呈显著负相关;油分含量与产量间的相关性较小。
Effects of subsoiling and nitrogen application on grain filling characteristics, grain yield and quality of maize under equal N content. The results showed that subsoiling significantly increased the 100-grain weight in the late grain filling stage, and the effect of T1 on the increase of 100-grain weight in later grain filling stage was greater than that in deep-rooting line T2. The maximum grain filling rate (Gmax) The rate of grain filling (G), the grain weight at the late grain filling stage and the active grain growing stage (P) were all higher than those under the one-time basal application of nitrogen fertilizer. The grain weight increased at the late grain filling stage with increasing the number of nitrogenous additions. The number of days (Tmax) appeared earlier and the effect of increasing T1 on the filling rate was greater than that of T2. The effects of N treatments on the filling rate were topdressing and filling stage, topdressing nitrogen fertilizer> topdressing nitrogen fertilizer> one-off base Nitrogen fertilizer. The effect of topdressing nitrogen on grain filling was greater than that of subsoiling. Grain weight and grain yield at the late filling stage were significantly and positively correlated. The correlation coefficients between G and Gmax and 100-grain weight at the later stage of grain filling were larger while the correlations of other grain-filling parameters were smaller. There was a significant positive correlation between grain protein content and grain yield. There was a significant negative correlation between grain protein content and grain yield. The correlation between grain oil content and grain yield was insignificant.