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在大田条件下,研究耐密型玉米品种中单909和非耐密型玉米品种丹玉405穗期不同遮荫条件下(S0,自然光照;S1,遮荫44%;S2,遮荫66%)玉米茎秆抗倒伏能力与产量的关系。结果表明,穗期遮荫后,两种类型玉米品种株高和穗位高升高;茎基部茎节单位长度、干重、穿刺强度、压碎强度、折断力度、产量和穗粒数均随遮荫程度的增加而减小,且非耐密型玉米品种下降幅度大于耐密型玉米品种。随弱光胁迫程度的增加,非耐密型玉米品种倒伏率明显高于耐密型玉米品种,非耐密型玉米品种较耐密型玉米品种对弱光反应敏感,千粒重和结实率下降是导致非耐密型玉米品种产量大幅降低的重要原因。
Under field conditions, the effects of different shading conditions (S0, natural light, S1, shading 44%; S2, shading 66% Relationship between lodging resistance and yield of corn stalk. The results showed that the plant height and ear height of two maize varieties increased after shading at heading stage. The length, dry weight, puncture strength, crushing strength, breaking strength, The degree of shade decreases and the non-tolerant maize varieties decline more than the dense maize varieties. With the increase of low light stress, the lodging rate of non-confidential corn was significantly higher than that of tolerant maize, non-tolerant maize varieties were more sensitive to weak light than millet, and the decrease of 1000-grain weight and seed setting rate Non-intimidating maize varieties significantly reduce the yield of important reasons.