氮肥施用技术对大麦抗倒性的影响

Effect of Nitrogen Application Technique on Ability of Resistance to Lodging in Barley

通过田间小区试验观察了大麦一生2次追肥对大麦抗倒性的影响，前期追肥在3叶期进行可以促使冬前分蘖足．次生根发生量大，麦苗素质好，减轻了大麦前期的根基倒伏；后期追肥在倒2叶期进行与倒3叶期倒4叶期相比，增加了大麦的千粒重．增强了大麦基部第2、3节间的抗折强度，减轻了大麦的茎倒。

The effect of twice top applications on ability of resistance to lodging had been researched in field test. Results showed that early top dressing when third leaf stage might increase tillerings before winter and secondary roots, raise the quality of seedlings, and lighten the early lodging occurred in root base. Late top dressing when inverted second leaf, compared with inverted third or fourth leaf stage, might increase gravity per 1000 grains, strengthen the bearing stress of second and third internodes from base, and lighten the stem lodging.