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羊草与克氏针茅氮元素含量对亚洲小车蝗取食选择的影响
张寅至,葛高飞,王荣富,郝树广
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(安徽农业大学生命科学院,合肥 230036; 安徽农业大学生物技术中心,合肥 230036;中国科学院动物研究所,北京100101)
摘要:
选择2种内蒙古草原的优势草种羊草和克式针茅,通过人工饲喂蝗虫取食的方法,分别测定亚洲小车蝗的5龄蝻期以及成虫在未施肥(ON)和施肥(HN)条件下对于2种不同草种的取食量和选择频次, 并研究N元素变化对于亚洲小车蝗取食选择性的影响。结果表明,在蝻期,N元素不是其取食选择性和食量的决定因素。而在成虫期,亚洲小车蝗特别是雄性更喜欢低N植物作为其食物。亚洲小车蝗对羊草或针茅的选择取食随发育阶段、性别和草的N含量进行调整,但在进化过程中趋向于选择低氮的植物。
关键词:  亚洲小车蝗  取食选择性  羊草  针茅  高氮  低氮
DOI:
基金项目:国家公益性行业(农业)科研专项(200903021)和国家“十二五”科技支撑课题(2012BAD14B13)共同资助。
Effect of nitrogen content in Leymus chinensis and Stippa capillata on feeding choice of Oedaleus asiaticus
ZHANG Yinzhi,GE Gaofei,WANG Rongfu,HAO Shuguang
(School of Life Science, Anhui Agricultural University, Hefei 230036; Biological Technology Center, Anhui Agricultural University, Hefei 230031;.Institute of Zoology, Chinese Academy of Sciences, Beijing 100101)
Abstract:
Two dominant plant species of Inner Mongolia grassland: Leymus chinensis and Stipa capillata were selected as materials to study the effects of N content change on O.asiaticus feeding selection. Food selection frequency and food intake amount of 5th instars stage larva and adult individuals of Oedaleus asiaticus were mensurated by means of artificial feeding on different herbage of unfertilized (ON) and fertilized (HN) forage. The results show that N content in food is not an important limiting factor in feeding selection and food intake amounts for O.asiaticus at 5th instars stage, but at adult stage, O. asiaticus, especially the male individuals are more interested in low N content plant or S. capillata. The results imply that the selective frequency and food intake amounts of O. asiaticus on L. chinensis and S. capillata at high or low N fertilization could be adjusted according to developmental stage, sex and N content in herbage. However, O. asiaticus tends to select low N content plant in the process of grasshopper evolution.
Key words:  Oedaleus asiaticus  food selection  Leymus chinensis  Stippa capillata  high nitrogen  low nitrogen

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