摘要
在sine函数拟合日温度变化基础上,利用Legg提出功能发育起点的方法,对新疆炮台镇地区越冬代棉铃虫羽化的平均功能发育起点、中数功能发育起点及其对应的平均日度功能累积值和中数日度累积值进行了计算。结果表明,越冬代棉铃虫羽化的平均功能发育起点、中数功能发育起点分别为3.70℃和3.89℃,对应的平均功能日度累积值和中数功能日度累积值为721.4 DD和554.6 DD(Degree-days);利用中数发育起点和对应的中数功能日度累积值为预测标准,预测误差最小;利用平均发育起点和对应平均功能日度累积值进行预测,预测误差最大。
Helicoverpa armigera Huebner is a pest species seriously harmful to cotton growth in north Xinjiang, China. Based on the traditional phenologieal model, fitted daily temperature change of sine functions and Legg＇ s method of average and median functional lower development thresholds, in this paper the eclosion-staring stage of overwintering generation of Helicoverpa armigera Huebner is predicted. The study area （44.85°N, 85.25°E, 337.8 m a. s. 1. ） is located in Paotai Town, Shihezi City, Xinjiang Uygur Autonomous Region, the field phenologieal data of Helicoverpa armigera Hueibne were provided by the local agrotechnieal popularization station, which were measured from mid-April to end-August during the periods of 1980 - 1982 and 1984 - 1988 and in 1996, 1998 and 1999; the corresponding meteorological data including the daily maximum and minimum temperatures were provided by China Meteorological Administration. The results show that the average and median functional lower development thresholds are 3.70 ℃ and 3.89 ℃, and the corresponding functional average and functional required degree-days are 721.4 and 554.6 days respectively. The predicted errors with the median lower development threshold and the functional median required degree-days are lower than that with the average lower development threshold and the functional average required degree-days.
出处
《干旱区研究》
CSCD
北大核心
2006年第1期46-49,共4页
Arid Zone Research
基金
中国科学院知识创新项目塔河二期和自治区高新技术项目
关键词
棉铃虫
羽化始期
物候模型
越冬
新疆
Helicoverpa arrnigera Htibner
average lower development threshold
Xinjiang
