检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:张国财[1,2,3] 岳书奎[1,2,3] 王志英[1,2,3] 方宏[1,2,3] 刘家志[1,2,3] 牟宗海 高玉梅[1,2,3] 黄丽
机构地区:[1]东北林业大学 [2]黑龙江省鸡西市林业局 [3]黑龙江省讷河县拉哈镇林业站
出 处:《东北林业大学学报》1996年第4期13-21,共9页Journal of Northeast Forestry University
基 金:黑龙江省"八五"攻关课题
摘 要:1991年在黑龙江省鸡西林区对落叶松绶尺蠖的发生期及发生量进行了预测。用期距法预测落叶松绶尺蠖卵、幼虫、蛹及成虫的发生始盛期、盛期、盛末期,预测结果与实际发生基本相符。通过对落叶松绶尺蠖有效积温的研究,求得卵期发育起点温度为(10±0.73)℃,卵期有效积温为(92.99±7.51)日度,预测卵期发生期同实际发生基本吻合。计算求得种群趋势指数值为0.1,预测下一世代种群发生数量同实际发生量基本相符。The occurrence date and population size of Zethenia rufescentaria Motsch. were forecasted at Jixi region in Heilongjiang province in 1991. The predicted results by using time of undergo method and effective accumulated temperature method were fundamentally tally with the practical occurrence date. The initial temperature and effective accumulated temperature of eggs were 10±0.73℃ and 92.99±7.51℃ (day-degree) respectively. Through the study on life table. The population trend index was obtained (I=0.1). And the forecast population size of next generation was fundamentally tally with the practical population size.
分 类 号:S763.305[农业科学—森林保护学] S763.712.2[农业科学—林学]
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.15