江苏省农田环境杂草水花生分布及危害

Distribution and Damage of Alternanthera philoxeroides in Agro-environment of Jiangsu Province

在对江苏省6大农业生态区七种生境类型的水花生(Alternan thera philoxeroides)分布及危害进行了目测法调查采集数据后,对其进行统计分析,并赋以生态学意义解释。调查研究表明,江苏省水花生分布及危害与纬度和水分密切相关,纬度决定一个地区的整体危害水平,水分条件的不同导致各种生境水花生危害程度差异显著。统计分析表明,随着纬度的升高水花生的危害逐渐减轻,太湖地区危害最严重,淮北地区危害最轻;水生境危害严重,特别是沟渠和池塘,旱生境和水稻田危害很轻。

The statistical analysis of Alternanthera philoxeroides infestation in six agriculture ecological regions of Jiangsu Province was assessed and ecologically interpreted. According to the investigation, distribution and damage ofAlternanthera philoxeroides was closely related to latitude and water. Latitude determined the overall level ofAlternanthera philoxeroides infestation in different agriculture ecological regions. Significant difference in water of all sorts of environments led to tremendous difference in coverage and frequency. Based on the results of statistical analysis, Alternanthera philoxeroides infestation became gradually decreasing with the rise of latitude, and the most damage in Taihu region and the least damage in Huaibei region; Alternanthera philoxeroides infestation was quite serious in water environment, especially in canals and ponds, but slight in dry environment and paddy field.