摘要
利用近30年NCEP/NCAR逐日气象再分析资料及中国褐飞虱逐候灯诱数据,分析季风指数与褐飞虱迁入量的时空关系,以探明季风进退和转换对我国褐飞虱迁入的影响。研究表明:(1)常年3月中、下旬是我国偏北季风转换为西南季风的时期,西南季风开始后的4月上旬是褐飞虱第1次大规模北迁的时期,第1次大规模北迁的主降区为华南稻区和西南稻区,随后迁向其北的其他稻区。(2)6月中旬—8月中旬是偏南季风指数达最大值的时期,也是各稻区褐飞虱北迁峰次最多、迁入量最集中的时期。(3)8月下旬至9月中旬为偏南季风向偏北季风的转换时期,也是褐飞虱北迁的终见期、南迁的始见期,第1次大规模南迁发生在这一时期内,主降区为江淮稻区和江岭稻区。(4)9月下旬至10月中旬是偏北季风的快速增强期、偏南季风的快速衰退期,也是褐飞虱南迁的高峰期。(5)10月下旬开始偏南季风撤出我国大陆,而偏北季风控制我国大陆,由北到南各稻区依次开始出现褐飞虱迁入的终见期。(6)褐飞虱异常发生年份中西南季风北上的早迟决定了褐飞虱在我国迁入始见期的早晚,而偏北季风南下的早迟则决定了我国褐飞虱迁入终见期的早晚。(7)迁入始见期滞后于西南季风的变化,迁入终见期滞后于偏北季风的变化,它们滞后的时间都为1—3候(即5—15d)。
Based on the daily reanalyzed meteorological dataset of the National Center of Environment Predicting（NCEP） in USA and the pentadly lighting catches of brown planthoppers（BPH） in China,in this paper,the temporal and spatial relationship between the selected monsoon index and the immigrations of BPH was investigated to explore the influence of monsoon advancing,retreating and conversion on the immigrations of BPH in China.The results showed as follows：（1） The middle ten days and the last ten days of March in a year is a conversing period from the north monsoon to southwest monsoon and the first large-scale migration northward of BPH′s populations occurs in the first ten days of April after the beginning of the southwest monsoon.The main landing regions of BPH′s populations in this large-scale migration northward are the rice-growing regions in the South and the Southwestern China.Then,the BPH′s populations migrate to the other northern parts subsequently.（2） From the middle ten days of June to the middle ten days of August in a year,the south monsoon index reach its maximum of the positive values while the migrations northward of BPH occur most frequently,the populations land in the all four main rice-growing regions,the peaks and landing heads of BPH′s immigration northward amount to the summit.（3） From the last ten days period of August to the middle ten days of September in a year is a conversing period from the south monsoon to the north monsoon and it is the ending period of BPH′s immigration northward and the beginning period of the immigration southward.The first large-scale migration southward of BPH′s populations occurs in this period and the main landing regions are the rice-growing regions between the Yangtze River and the Huaihe River and the rice-growing regions between the Yangtze River and the Nanling Mountain.（4） From the last ten days of September to the middle ten days of October is the strengthening period of the north monsoon and the weakening period of the
出处
《生态学报》
CAS
CSCD
北大核心
2013年第16期4864-4877,共14页
Acta Ecologica Sinica
基金
国家自然科学基金面上资助项目(41075086)
国家公益性行业(气象)科研专项资助项目(GYHY201006026)
江苏省农业科技自主创新资助项目(SCX(12)3058)
江苏省高校优势学科建设工程
江苏省研究生创新工程资助项目
关键词
褐飞虱
迁入
始终见期
季风指数
稻区
Nilaparvata lugens（Stal）
immigration
beginning and ending dates
monsoon index
rice-growing regions
