摘要
调查结果表明 ,由于地区间土壤种类、酸碱度、地势差异 ,上海稻田杂草的分布和危害有明显区域性。西部地区以稗草 (Echinochloacrusgalli)危害最重 ,中东部地区则以鸭舌草 (Monochoriavaginalis)危害最重 ,而江中沙洲地区以水苋菜 (Ammanniabaccifera)、矮慈姑 (Sagittariapygmaea)危害最重 ,其中牛毛草 (Eleocharisyokoscensis)和日照瓢拂草 (Fimbristylismiliacea)仅在西部地区发现 ,且眼子菜 (Potamogetondistinctus)从西部至东部其相对频率依次降低 ,而在江中沙洲地区则未见 ,与之相反 ,扁秆薰鹿 草 (Scirpusplaniculmis)在中、东部及江中沙洲地区的相对频率依次降低 ,而在西部地区则未见。
The surveys showed that the weed distribution in rice fields in Shanghai was obviously various due to the differences of soil type, acid-base scale and terrain between areas. Echinochloa crusgalli was the most harmful to rice in the west area, Monochoria vaginalis was the most harmful in the middle and east area, and Ammannia baccifera and Sagittaria pygmaea were the most harmful in the Chongming county coastal areas. Eleocharis yokoscensis and Fimbristylis miliacea only occurred in the west area, and the relative frequency of Potamogeton distinctus gradually decreased from west to east and didn't occur in the Chongming county coastal areas. On the contrary, Scirpus planiculmis didn't occur in the west and its relative frequency gradually increased from west to east.
出处
《上海农业学报》
CSCD
2004年第2期85-88,共4页
Acta Agriculturae Shanghai
基金
上海市科委资金资助项目 (编号 :0 2 3 112 0 5 5 )
关键词
上海
稻田杂草
分布
危害
种类
Weeds in rice fields
Distribution
Harmful
Area of Shanghai
