施肥及光合调节剂对小麦根系及籽粒产量和蛋白质含量的影响

Effect of Fertilizer Application and Photosynthetic Regulator Treatment on Root System Characteristic,Grain Yield and Protein Content in Wheat

以在施肥总量相同条件下不同底施和追施比例及光合调节剂的处理 ,研究了小麦不同时期根系特征及籽粒产量和蛋白质含量。结果表明 ,氮肥全部底施和提高底施比例有利于增加拔节期和孕穗期的根长密度、根平均直径和根总表面积。各种氮肥处理上述根系特征指标在各土层中均表现为孕穗期比拔节初期数值大。增加追施氮肥的比例有利于提高籽粒蛋白质含量。晚播条件下提高底施氮肥的比例有利于增加穗数和产量。钾肥分次施用比全部底施增产效果好。光合调节剂有一定增产作用而对籽粒蛋白质含量没有影响。

Wheat root system characteristics, grain yield and protein content were studied under the conditions of fertilizer and photosynthetic regulator treatments. The results showed that the increasing the proportion of basal nitrogen could increase the root length density, root diameter and root surface area at the elongation stage and booting stage. The root system characteristics indexes all increased more at booting stage than elongation stage in different nitrogen treatment. The grain protein content was benefited by increasing the proportion of additional nitrogen. The ear numbers and grain yield could be increased under the condition of increasing the proposition of local nitrogen fertilizer and sowing late. Increasing the proportion of additional potash fertilizer was better than all bases on grain yield. Grain yield would be better when potash fertilizer was applied with the manner of separate times other than one time before sowing. Photosynthetic regulator played some role in increasing the yield but had no effect on the grain protein content.