| 夏河甘加草原草地蝗虫优势种的确定及混合种群密度高峰值模型研究 |
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| 引用本文： | 柳小妮,蒋文兰,刘晓静,师尚礼.夏河甘加草原草地蝗虫优势种的确定及混合种群密度高峰值模型研究[J].草原与草坪,2007(4):30-34,39. |
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| 作者姓名： | 柳小妮 蒋文兰 刘晓静 师尚礼 |
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| 作者单位： | 甘肃农业大学,草业学院,甘肃,兰州,730070 |
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| 基金项目： | “基于网络的甘肃省草地蝗虫预报专家系统”课题(2001AA115250)资助 |
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| 摘 要： | 通过对夏河甘加草原草地蝗虫种群存在度分析,确定该地区草地蝗虫优势种为狭翅雏蝗、小翅雏蝗、宽须蚁蝗、皱膝蝗(红翅皱膝蝗和鼓翅皱膝蝗)。对气象因子进行了主成分分析,提出了一年高峰值(yn)、产卵期的平均降水(x1)和温度(x2)、本年孵化期平均气温(x3)和降水(x3)为关键因子的非线性模型:yn+1=18.110 6+0.328 3x1+32.229 9/lnx2-182.237 3e-0.8x3+42.173 3x4e-x4)yn来描述混合种群的密度高峰值,且拟合度较高。
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| 关 键 词： | 夏河甘加 草地蝗虫 优势种 混合种群 非线性模拟 |
| 文章编号： | 1009-5500（2007）04-0030-06 |
| 收稿时间： | 2007-03-19 |
| 修稿时间： | 2007-03-19 |
Dominant species determination and nonlinear models for estimating the population density peak value of grasshopper in grassland of Ganjia in Xiahe |
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| LIU Xiao-Ni,JIANG Wen-Lan,LIU Xiao-Jing,SHI Shang-Li.Dominant species determination and nonlinear models for estimating the population density peak value of grasshopper in grassland of Ganjia in Xiahe[J].Grassland and Turf,2007(4):30-34,39. |
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| Authors: | LIU Xiao-Ni JIANG Wen-Lan LIU Xiao-Jing SHI Shang-Li |
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| Institution: | College of Pratacultural Science ,Gansu Agricultural University,Lanzhou 730070, China |
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| Abstract: | Based on the investigated occurring population and degree of presence,it was identified that the dominant species were Myrmeleotettix palpates,Chorthippus dubius,Chorthippus dubius,Angaracris rhodopa and Angaracris barabensis.The average precipitation and the average temperature in spawned stage in previous year,the average temperature and the average precipitation in spawned stage in current year were key factors,the peak value of grasshopper population in previous year(yn),the rainfall(x1) and temperature(x2)in spawned stage in previous year,and rainfall(x3)and temperature(x4)in incubate stage in current year were used as estimation factors to establish the nonlinear models to simulation peak value of population density of mixed community:yn 1=(-18.110 6-0.328 3 x1 32.229 9/lnx2-182.237 3 e-0.8x3 42.173 3 x4e-x4) yn;The estimated results showed that the models could predicate the true population at high significant level. |
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| Keywords: | Ganjia Xiahe grasshopper dominant species mixed population nonlinear model |
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