伊犁绢蒿养分含量与双带天幕毛虫取食的初步研究

Preliminary Study on Nutrient Content of Seriphidium transiliense and Feeding of Malacosoma kirghisica Staudinger

双带天幕毛虫可见于蒿类荒漠草地,在牧草返青期爆发,喜食伊犁绢蒿嫩芽幼叶。为探究双带天幕毛虫的分布与伊犁绢蒿叶片碳、氮含量、C/N之间的关系,通过对比绢蒿嫩枝在毛虫发生草地土壤与无毛虫草地土壤的碳、氮、磷、钾养分含量,研究天幕毛虫的取食与土壤养分环境、绢蒿养分含量之间的关系。结果表明:绢蒿荒漠草地土壤养分含量中等偏低,仅毛虫发生地的土壤速效钾含量极显著高于无毛虫草地。双带天幕毛虫明显喜食N/P低、K/N高的绢蒿嫩枝,趋向于采食含氮量相对较低,碳、磷、钾相对较高的嫩枝。

Malacosoma kirghisica Staudinger can be found in Artemisiadesert grassland,outbreaks in the green grass period,and mainly eat Seriphidium transiliense bud leaves.In order to explore the relationship between the distribution of Malacosoma kirghisica and the C,N content,C/N of Seriphidium transiliense leaf,we compared the content of C,N,P and K in Seriphidium transiliense twig in meadow soil with caterpillar and without caterpillar.The relationship between the feeding of the caterpillar and the soil nutrient environment,the C,N and P of Seriphidium transiliense was studied.The results showed that the content of soil nutrients in the desert grassland of Seriphidium transiliense was moderately low,and only the content of available potassium in soil with caterpillar was significantly higher than that of no caterpillar grassland.Malacosoma kirghisica obviously liked to eat a low N/P and high K/N Seriphidium transiliense twig,tend to feed the shoots which N content was relatively low and C,P,K content was relatively high.