中国农业气象

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准双周大气低频振荡对江岭稻区褐飞虱迁入的影响

刁家敏,孙思思,包云轩,陆明红,谢晓金   

  1. 1.南京信息工程大学气象灾害预报和评估协同创新中心,南京 210044;2.江苏省农业气象重点实验室/南京信息工程大学,南京 210044;3.农业部全国农业技术推广与服务中心,北京 100125
  • 收稿日期:2016-08-25 出版日期:2017-03-20 发布日期:2017-03-13
  • 作者简介:刁家敏(1991-),硕士生,研究方向为农业气象、农业病虫测报学。E-mail:1121967219@qq.com
  • 基金资助:
    国家自然科学基金(41475106;41075086);江苏省农业科技自主创新基金项目(CX(12)3056);江苏省高校自然科学研究项目(14KJA170003);江苏高校优势学科建设工程资助项目(IRT1147)

Impacts of Quasi-biweekly Atmospheric Low Frequency Oscillation on Immigration of Nilaparvata lugens(St?l)in Cropping Area of Jiangling

DIAO Jia-min, SUN Si-si, BAO Yun-xuan, LU Ming-hong, XIE Xiao-jin   

  1. 1.Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science & Technology, Nanjing 210044, China; 2.Key Laboratory of Agricultural Meteorology in Jiangsu Province/Nanjing University of Information Science & Technology, Nanjing 210044; 3.National Agricultural Technology Extension and Service Center, Ministry of Agricultural, Beijing 100081
  • Received:2016-08-25 Online:2017-03-20 Published:2017-03-13

摘要: 探明准双周大气低频振荡对中国褐飞虱迁入的影响,可为褐飞虱的延伸期预报提供重要的参考依据。根据1979-2015年中国105个植物保护站的逐日褐飞虱灯诱资料、同期NCEP/NCAR全球逐日气象再分析资料,筛选出具有典型褐飞虱偏重以上发生特征的年份(2010年),分析江岭稻区褐飞虱迁入量与准双周低频大气振荡之间的关系;利用HYSPLIT轨迹计算模型对迁入典型站点的褐飞虱种群作后向轨迹分析,探讨大气低频流场对褐飞虱迁飞路径和虫源地的影响。结果表明:(1)2010年8-9月江岭稻区褐飞虱迁入量存在显著的10~20d振荡周期;(2)同期850hPa和925hPa两个高度的风场、位势高度场及垂直速度场均存在10~20d的显著低频周期,且褐飞虱迁入量的低频振荡与这些大气物理量的低频振荡呈显著相关;(3)前期江岭稻区主要受低频西南风的影响,褐飞虱种群随西南风由西南稻区向江岭稻区输送,后期部分褐飞虱种群随东北风由江淮稻区向江岭稻区输送;(4)褐飞虱种群的后向轨迹模拟计算结果,进一步验证了迁入江岭稻区的褐飞虱的轨迹和虫源地与低频风场的盛行基本一致。

关键词: 褐飞虱, 小波分析, 低频流场, 迁飞轨迹, 虫源地

Abstract: Understanding the impacts of the atmospheric oscillation with quasi-biweekly low frequency on the immigration of brown planthopper (BPH), Nilaparvata lugens (St?l) could provide an important reference to the extended-period forecast of its occurrence. The daily BPH’s light trap data from 105 plant protection stations in China, the daily reanalyzed meteorological data from the National Center of Environment Prediction (NCEP), and the data from the National Center of Atmospheric Research (NCAR) from 1979 to 2015 were collected. It took 2010 as a typical year with occurrence characteristic of BPH, and the relationship between the amount of BPH migrated in rice-growing region from Nanling Mountain to the Yangtze River and the atmospheric oscillation with quasi-biweekly low frequency was analyzed. HYSPLIT (hybrid single particle Lagrangian integrated trajectory) model was used to analyze the backward trajectory of the brown planthopper population at the typical site. The impacts of the atmospheric oscillation on insect sources and migratory paths of BPH was discussed. The results showed that, (1)10-20d oscillation cycle of BPH amount existed significantly in the rice-growing region from the Nanling Mountain to the Yangtze River during August and September in 2010. (2)Wind fields, geo-potential height fields and vertical velocity fields on the isobaric surfaces of 850hPa and 925hPa appeared significant low-frequency cycles of 10-20d simultaneously. And the low-frequency oscillation of BPH’s immigrating amount was correlated significantly with these atmospheric physical variables. (3)Under the impacts of the low-frequency southwestern wind, the populations of BPH were transported from the rice-growing region of southwestern China to the rice-growing region, from the Nanling Mountain to the Yangtze River. In the later period, the part of BPH’s populations immigrated from the rice-growing region between the Huaihe River and the Yangtze River to the rice-growing region between the Nanling Mountain and the Yangtze River under the impacts of the low-frequency northeastern wind.(4)Results of backward trajectory analysis of Brown Planthopper Population was provided to confirm that the insect sources and migration paths of BPH’s populations that immigrated into the rice-growing region between the Nanling Mountain and the Yangtze River were consistent with the low frequency prevailing wind fields.

Key words: Nilaparvata lugens (St?l), Wavelet analysis, Low-frequency atmospheric airflow field, Migration trajectory, Region of insect source