摘要
采用合成分析和相关分析方法研究了气候异常对青海湖环湖地区草地蝗虫灾害发生的影响。合成分析表明蝗虫灾害严重与当年气候状况关系密切。蝗灾等级与前一年 7～ 8月平均气温、当年 2～ 8月月平均气温、冬季降水量呈正相关 ,而与前一年 7～ 9月降水量、10～ 12月气温、当年 5～ 9月降水量呈负相关关系。这说明前一年和当年夏季温暖少雨、冬季多雪有利于蝗虫生长发育和越冬 ,会造成蝗灾 。
Effects of climate anomaly on infestation level of grasshopper in the pasture areas around Qinghai Lake were examined using composition and correlation analysis. Composition analysis results indicated that climate conditions were closely related with infestation levels. Occurrence levels were posatively correlated with monthly mean temperature from July to August in the previous year and monthly average temperature from February to August and rainfall in winter in the current year. Whereas they were negatively correlated with monthly rainfall from July to September and monthly mean temperature from October to November in the previous year, and monthly rainfall from May to September in the current year. These results suggested that warm, dry summer and snowy winter in the previous year accompanied by warm, dry summer in the current year will be favorable to wintering and development of grasshopper, and vice versa.
出处
《植物保护》
CAS
CSCD
北大核心
2002年第4期5-8,共4页
Plant Protection
基金
国家自然科学基金资助项目 (4 99710 5 6)
