不同氮肥处理对春小麦东农124源库关系的影响

将等量氮肥分别以不同底追肥比例在不同时期施入,通过其对小麦旗叶叶面积的积累及群体粒叶比的影响,研究不同氮肥施肥处理对春小麦东农124源库关系的调节作用。结果表明:各施肥处理均比对照(不施氮肥)极显著地提高了旗叶叶面积的积累量和单株总结实粒数和总结实粒重,其中,底施和拔节期追施比例1:2的处理,由于小麦生长的前期和中期施用一定量的氮肥,既获得较大的旗叶叶面积积累又保证了较高群体叶粒比,是源库关系较为协调的优化处理。

Effects of Different Nitrogenous Treatments on Relationships between Source and Sink in Spring Wheat Dongnong 124

The effect of different basic fertilizer and topdressing fertilizer ratio under the condition of the same amount of N-fertilizer application on the relationship between source and sink in spring wheat Dongnong124 was studied.The results showed that the accumulation of flag leaf area,total grains per plant and total grain weight per plant of all fertilized treatments were more remarkablely increased than that of control(CK,no N-fertilizer applied).Of the 9 treatments,the treatment ⑥(basic N-fertilizer : top-dressing fertilizer in elongation stage is 1∶2) had a higher flag leaf area and the grain-leaf area ratio,which was the optimal treatment to regulate the relationships of source and sink of spring wheat Dongnong124.