连作对嘉菊植株构件、抗病虫能力和产量的影响

Effect of Continuous Cropping on Module,Rest and Disease Resistance and Yield of Jia-xiang Chrysanthemum

探索连作对嘉菊植株构件、抗病虫能力和产量的影响。对山东省嘉祥县连作和非连作地种植的嘉菊根、茎、叶、花各构件、病虫害发生及产量进行调查研究。结果表明,(1)连作对嘉菊植物构件有显著影响,整株变矮,主干变细,冠幅与叶面积减小,各级分枝数及直径变细,长度5 cm以上侧根数减少;(2)连作嘉菊抗病力减弱但未达显著水平,蛴螬为害致缺苗断垄数增加,差异未达显著水平;(3)连作嘉菊花蕾数减少,百蕾重减轻,产量明显下降。结论:连作对嘉菊植物构件产生显著影响,是导致减产的主要原因,病虫害发生强化了连作的负面效应。

Continuous cropping has a terrible effect to the product of Jia-xiang Chrysanthemum, a kind of medical Chrysanthemum. It can do harm to the roots, branches, leaves, flowers and so on, reducing the quantities anddisease resistance. By comparison, we find that the plant becomes shorter, thinner, smaller and the leaf area and the roots reducing. Secondly, the resistance to disease is weakened but not significant. Grubs increase but not so much either. Thirdly, there are less and lighter flowers, so the produce is declined. To conclude, continuous cropping will have a terrible effect on Jia-xiang Chrysanthemum in order to reduce the produce. The pests can enhance the negative effects.