西华师范大学学报：自然科学版
西華師範大學學報：自然科學版
서화사범대학학보：자연과학판
Journal of China West Normal University:Natural Science Edition
2012年
1期
54-60
,共7页
白背飞虱%地统计学%空间结构%Surfer8.0
白揹飛虱%地統計學%空間結構%Surfer8.0
백배비슬%지통계학%공간결구%Surfer8.0
Sogatella furcifera%geostatistics%spatial distribution%Surfer 8.0
白背飞虱Sogatella furcifera（Horváth）是我国重要的迁飞性水稻害虫,对我国的水稻生产造成严重危害.为了解其迁入后的聚集与扩散的动态过程和空间分布规律,为综合防治提供理论依据,本文根据2008年在秀山县的田间系统调查资料,运用地统计学中的半方差函数,研究白背飞虱长翅型成虫迁入后在稻田间的聚集与扩散的动态过程和空间分布规律,建立了自迁入至迁出在田间东西和南北两个方向上的空间变异曲线模型,并利用Surfer8.0软件对空间分布数据进行插值和模拟.结果表明,白背飞虱长翅型密度越高,空间变量的变化幅度越大;由随机因数引起的空间变异平均为37.6%,由自相关因数引起的空间变异为62.4%,各调查时间东西方向的空间相关范围都小于南北方向,前者平均为12.86m,后者为28.85m;空间插值表明白背飞虱长翅型种群在稻田的聚集斑块南北方向比东西方向长,即南北方向是白背飞虱长翅型聚集和扩散的主方向.
白揹飛虱Sogatella furcifera（Horváth）是我國重要的遷飛性水稻害蟲,對我國的水稻生產造成嚴重危害.為瞭解其遷入後的聚集與擴散的動態過程和空間分佈規律,為綜閤防治提供理論依據,本文根據2008年在秀山縣的田間繫統調查資料,運用地統計學中的半方差函數,研究白揹飛虱長翅型成蟲遷入後在稻田間的聚集與擴散的動態過程和空間分佈規律,建立瞭自遷入至遷齣在田間東西和南北兩箇方嚮上的空間變異麯線模型,併利用Surfer8.0軟件對空間分佈數據進行插值和模擬.結果錶明,白揹飛虱長翅型密度越高,空間變量的變化幅度越大;由隨機因數引起的空間變異平均為37.6%,由自相關因數引起的空間變異為62.4%,各調查時間東西方嚮的空間相關範圍都小于南北方嚮,前者平均為12.86m,後者為28.85m;空間插值錶明白揹飛虱長翅型種群在稻田的聚集斑塊南北方嚮比東西方嚮長,即南北方嚮是白揹飛虱長翅型聚集和擴散的主方嚮.
백배비슬Sogatella furcifera（Horváth）시아국중요적천비성수도해충,대아국적수도생산조성엄중위해.위료해기천입후적취집여확산적동태과정화공간분포규률,위종합방치제공이론의거,본문근거2008년재수산현적전간계통조사자료,운용지통계학중적반방차함수,연구백배비슬장시형성충천입후재도전간적취집여확산적동태과정화공간분포규률,건립료자천입지천출재전간동서화남북량개방향상적공간변이곡선모형,병이용Surfer8.0연건대공간분포수거진행삽치화모의.결과표명,백배비슬장시형밀도월고,공간변량적변화폭도월대;유수궤인수인기적공간변이평균위37.6%,유자상관인수인기적공간변이위62.4%,각조사시간동서방향적공간상관범위도소우남북방향,전자평균위12.86m,후자위28.85m;공간삽치표명백배비슬장시형충군재도전적취집반괴남북방향비동서방향장,즉남북방향시백배비슬장시형취집화확산적주방향.
Whitebacked planthopper,Sogatella furcifera（Horváth） is a major immigration pest of rice crops in China.In order to provide a theoretical basis for its integrated control,dynamic process and spatial pattern of macropterous Sogatella furcifera were studied in the period from their immigration to emigration by using geostatistical methods in Xiushan county,and semivariogram curve models were established in directions from north to south and west to east.Isoclines maps of the pest at each stage were set by the geostatistical software Surfer 8.0 with Kriging interpolation.The variograms showed the higher the density was,the larger the space variation scope became.Average space variation was 37.6% caused by the random factor and 62.4% caused by the autocorrelation.The random degree of space variation became greater as the rice grew up.Space-related distance was 12.86 m in the direction of east-west and 28.85 m in south-north averagely.Kriging interpolation indicated that aggregated scope in south-north was larger than that in east-west.The population of macropterous Sogatella furcifera showed a clumped distribution mainly after immigrating into rice fields and south-north was the main direction for the pest to aggregate and diffuse.
