小麦储藏环境中CO2体积分数变化与赤拟谷盗发生的关系研究

为阐明储粮环境中害虫发生与CO2体积分数变化的关系,研究了不同水分含量的小麦感染不同虫口密度(0、2、5、10、20、30头/kg)赤拟谷盗后储藏环境中CO2体积分数变化的情况。结果表明:对于水分含量相同的小麦,储藏环境中CO2体积分数随虫口密度的增加和储藏时间的延长而显著增加。对于水分含量12%的小麦,初始感染虫口密度为30头/kg的储粮环境中CO2体积分数为1.383%,在第30天达到最大值13.187%。对于水分含量14%的小麦,初始感染虫口密度为30头/kg的储粮环境中CO2体积分数为0.920%,在第24天达到最大值,为18.217%。研究结果为通过检测CO2体积分数变化来早期监测粮堆中虫害发生情况提供了可靠信息。

The relationship between the occurrence of Tribolium castaneum and the CO_2 volume fraction in wheat storage environment

In order to elucidate the relationship between the occurrence of insect pests and the CO2 volume fraction in grain storage environment,the change of CO2 volume fraction in stored wheat with different moisture contents and infested by different initial population density(0,2,5,10,20,and 30 adults per kg of wheat)was investigated.The results showed that the CO2 volume fraction significantly increased with the increasing insect densities and treatment time in the wheat storage with the same moisture content.For wheat with a moisture content of 12%and initial population density of 30 T.castaneum adults per kg of wheat,the CO2 volume fraction in the wheat storage environment was 1.383%,then reached maximum(13.187%)on the 30th day.For wheat with 14%moisture content and initial population density of 30 T.castaneum adults per kg of wheat,the CO2 volume fraction in the stored wheat environment was 0.920%,then reached maximum 18.217%on the 24 th day.The results provided reliable information for monitoring the occurrence of insects in stored grain by detecting the change of CO2 volume fraction in the future.