甘蔗苗期大螟幼虫空间格局的地统计学分析

doi:10.11924/j.issn.1000-6850.casb15020090

中国农学通报 ›› 2015, Vol. 31 ›› Issue (20): 86-90.doi: 10.11924/j.issn.1000-6850.casb15020090

甘蔗苗期大螟幼虫空间格局的地统计学分析

罗志明,尹炯,黄应昆,李文凤,王晓燕,张荣跃,单红丽

(云南省农业科学院甘蔗研究所,云南开远 661699）

收稿日期:2015-02-16 修回日期:2015-05-20 接受日期:2015-05-25 出版日期:2015-07-28 发布日期:2015-07-28
通讯作者: 黄应昆
基金资助:
现代农业产业技术体系建设专项资金(CARS-20-2-2)；云南省现代农业产业技术体系建设专项；云南省科技计划项目“甘蔗主要病虫害防控及新农药研发”(2013BB013)；云南省农业科学院院基金“抗大螟甘蔗品种的筛选及抗虫机制初步研究”(2014CZJC010)。

Geostatistical Study on Spatial Pattern of Sesamia inferens Walker Larvae in Sugarcane Seedling Stage

Luo Zhiming, Yin Jiong, Huang Yingkun, Li Wenfeng, Wang Xiaoyan, Zhang Rongyue, Shan Hongli

(Sugarcane Research Institute, Yunnan Academy of Agricultural Sciences, Kaiyuan Yunnan 661699)

Received:2015-02-16 Revised:2015-05-20 Accepted:2015-05-25 Online:2015-07-28 Published:2015-07-28

摘要/Abstract

摘要： 为明确大螟幼虫在甘蔗苗期的空间格局，2012年在云南省农业科学院甘蔗研究所科研示范基地开展了甘蔗苗期大螟为害枯心苗调查，并应用地统计学方法进行空间格局分析。结果表明：新植蔗虫口密度（1.07头/点）明显低于宿根蔗（1.91头/点），新植蔗变异系数、峰度和偏度均较宿根蔗大，表明大螟在宿根蔗较新植蔗发生重，且新植蔗田较宿根蔗田有更高的聚集度。在半变异函数理论模型模拟方面，新植蔗田在4个方向均为球形模型，宿根蔗田在45°和90°方向为球形模型、0°方向为高斯模型、135°方向属随机分布，表明大螟幼虫整体上呈聚集分布，但新植蔗田聚集度较宿根蔗田高。在相关性方面，新植蔗田和宿根蔗田均在0°和45°方向上有中等的空间相关性，相关距离宿根蔗明显大于新植蔗，表明宿根蔗田的大螟幼虫空间相关性较新植蔗田强。通过Kriging插值模拟图可清晰看出，新植蔗大螟幼虫在蔗田边缘发生严重，虫源主要来自周边蔗田，宿根蔗大螟幼虫在田间的螟虫发生点多且均匀，虫源主要来自自身蔗田。

关键词: 港口, 港口, 城市, 港城关系

Abstract: To determine spatial pattern of Sesamia inferens Walker larvae in sugarcane seedling stage, research of sugarcane seedling stage dead heart in YSRI research and demonstration base were conducted in 2012. Spatial pattern of S. inferens larvae was studied by geostatistical methods in different cultivated forms of sugarcane. The results showed that the S. inferens larval density in plant cane (1.07 larvae per site) was significantly lower than that in ratoon cane (1.91 larvae per site), and the variable coefficient, kurtosis and skewness in plant cane were higher than that in ratoon cane. This indicated that the occurrence of the larval population in ratoon cane was more severe than that in plant cane, and the aggregation degree in plant cane was higher than that in ratoon cane. Semivariogram of S. inferens larvae in the four directions in plant cane field could be described by spherical model. Semivariogram of S. inferens larvae in ratoon cane could be described by spherical models in the 45° and 90° directions, Gaussian model in the 0° direction and random distribution in the 135° direction, indicating that larval population showed an overall clumped distribution both in the plant and ratoon cane field, but aggregation degree in plant cane was higher than that in ratoon cane. In the 0° and 45° direction, moderate spatial correlations were found both in plant and ratoon cane, and the correlation distance in ratoon cane was significantly longer than that in plant cane, indicating a stronger spatial correlation in ratoon cane than that in plant cane. The Kriging interpolation diagrams showed that severe occurrence of the larvae was found in the marginal areas in plant cane with a major insect source from the circumjacent cane fields. More and evenly distributed centers could be seen in ratoon cane, suggesting an insect source within the cane field.

罗志明,尹炯,黄应昆,李文凤,王晓燕,张荣跃,单红丽. 甘蔗苗期大螟幼虫空间格局的地统计学分析[J]. 中国农学通报, 2015, 31(20): 86-90.

Luo Zhiming,Yin Jiong,Huang Yingkun,Li Wenfeng,Wang Xiaoyan,Zhang Rongyue and Shan Hongli. Geostatistical Study on Spatial Pattern of Sesamia inferens Walker Larvae in Sugarcane Seedling Stage[J]. Chinese Agricultural Science Bulletin, 2015, 31(20): 86-90.

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甘蔗苗期大螟幼虫空间格局的地统计学分析

Geostatistical Study on Spatial Pattern of Sesamia inferens Walker Larvae in Sugarcane Seedling Stage

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