中国农业科学Issue(21)：4464-4470,7.DOI:10.3864/j.issn.0578-1752.2013.21.008
CO2浓度升高对稻纵卷叶螟生长发育、繁殖和食物利用效率的影响
Effects of Elevated CO2 Concentration on Development, Reproduction and Food Utilization of the Cnaphalocrocis medinalis Guenée (Lepidoptera:Pyralidae)
摘要
Abstract
[Objective] This study was designed to reveal the potential influence of CO 2 enrichment on life history of the rice leaf-folder (Cnaphalocrocis medinalis), with the goal of providing data for projecting its trend under the climate change.[Method] Two levels of CO 2 concentration-ambient (390μL·L-1) and doubling (780μL·L-1) were manipulated in incubators, where rice plants were grown for feeding larvae. Developmental and reproductive performances were examined, and food consumption and nutritional utilization indices were measured for the 4th instar larva. [Result]The doubling CO 2 treatment significantly influenced body weight of larvae till 5th instar, pupal time and body weight, but did not influence larval time and pupation rate. The body weight of the final instar (5th) larva decreased by 16.1%, pupal duration by 28.7%, and pupal weight by 9.9%, under the elevated CO2 as opposed to the ambient CO2. The CO2 elevation did not affect sex ratio and fecundity, but significantly influenced the larva-to-adult emergence survival and egg hatching. The larva-to-adult emergence survival rate decreased by 44.0%and the egg hatching rate reduced by 26.8%under the elevated CO2 as compared to the ambient CO2. The trial of the 4th instar larva showed significant effects of elevated CO 2 on food consumption and utilization. The food consumption increased but the relative consumption rate was not changed by the elevated CO2. The relative growth rate increased by 21.2%and the approximate digestibility increased by 15.7%, but the efficiency of conversion of ingested food to body substance decreased by 24.8%and the efficiency of conversion of digested food to body substance decreased by 37.1%.[Conclusion]The CO2 enrichment may have negative effects on life history traits of C. medinalis, but the population dynamics of insect is complex and other effect such as temperature should be considered.关键词
CO2浓度升高/稻纵卷叶螟/生长发育/繁殖/食物利用率Key words
elevated CO 2 concentration/Cnaphalocrocis medinalis/growth and development/reproduction/food utilization引用本文复制引用
李保平,郭庆,孟玲..CO2浓度升高对稻纵卷叶螟生长发育、繁殖和食物利用效率的影响[J].中国农业科学,2013,(21):4464-4470,7.基金项目
国家公益性行业（农业）科研专项（200903003，201103002）、国家科技支撑计划项目 （）
