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以普通白菜(Brassica campestris ssp.Chinensis L.)品种一代交配“华冠青梗菜”为供试材料(以下简称“青梗菜”),在商丘学院实验田研究了不同氮肥用量和防虫方法对“青梗菜”单株叶片数目、单株鲜重、单株干重的影响并比较了不同防虫方法的防虫效果。结果表明:单株叶片数目随氮肥用量升高显著升高,且在农药处理区显著大于防虫网处理区和对照区,后二者之间差异不显著。单株鲜重、干重均随氮肥用量升高显著升高,防虫方法及防虫方法与氮肥用量的交互作用对单株鲜重影响不显著,单株干重表现为农药处理与防虫网处理显著大于对照处理。氮肥用量对植株虫危害率影响不显著,在同一氮肥用量下防虫方法对植株虫危害率影响显著,具体表现为防虫网处理区虫危害率最低,而对照区虫危害率最高;虫害的相对防效表现为农药处理区显著小于防虫网处理区,氮肥用量为15kg/667m2的相对防效最好。综上,防虫网覆盖和追施15kg/667m2的氮肥最有利于“青梗菜”的优质高产栽培。
The experiment was conducted in the experimental field of Shangqiu College to study the effects of different nitrogenous fertilizer dosage and pest control on the “Brassica campestris ssp.Chinensis L.” Methods The number of leaves per plant, the fresh weight per plant and the dry weight per plant of “Qingleikou” were compared and the pest control effects of different pest control methods were compared. The results showed that the number of leaves per plant increased significantly with the increase of N application rate, and was significantly greater in the pesticide treatment area than that in the insect net treatment area and the control area. The difference between the two was insignificant. The fresh weight and dry weight per plant all increased significantly with the increase of N application rate. The interaction between pest control method and pest control method and N application rate had no significant effect on the fresh weight per plant, and the dry weight per plant showed significant effects of pesticide treatment and pest control Greater than the control treatment. The amount of nitrogen fertilizer had no significant effect on the damage rate of plant pests, and the pest control method had a significant impact on the pest risk of pests at the same nitrogen application rate. The pest damage rate was the lowest in pest control and the pest control was the highest The results showed that the pesticide treatment area was significantly smaller than the insect net treatment area, and the relative control effect of 15 kg / 667m 2 nitrogen fertilizer was the best. In summary, the insect-resistant net coverage and topdressing 15kg / 667m2 of nitrogen fertilizer is most conducive to “Qingtiansi ” high-quality and high-yielding cultivation.