宜昌市柑橘园杂草种群分布特点

Distribution Features of Weeds Communities in Citrus Garden in Yichang

为明确湖北省宜昌市柑橘主要产区杂草的种类及分布,确定危害柑橘生产的主要杂草种类,为柑橘园杂草防除提供依据,采用5点取样法对湖北省宜昌市枝江市、宜都市和秭归县柑橘园杂草的种类及分布进行了调查。结果表明,该地区柑橘园主要杂草有35科87种,优势种为棒头草(Polypogon fugax)、小飞蓬(Conyza canadensis)、酢浆草(Oxalis corniculata)、铁苋菜(Acatypha austrdis)、阿拉伯婆婆纳(Veronica persica)和珠芽景天(Sedum bulbiferum),发生频度较高的几种杂草依次为小飞蓬、酢浆草、铁苋菜、阿拉伯婆婆纳、异叶黄鹌菜(Youngia heterophylla)和一年蓬(Erigeron annuus)。危害最严重的杂草种类为棒头草、小飞蓬、酢浆草和瘦风轮菜(Calamintha gracilie),应作为防除重点。海拔高度对杂草的种类及分布有一定影响,在海拔较低的柑橘园中杂草种类较多。

In order to clarify the weed species,their distribution and the main species in major citrus-producing areas in Yichang of Hubei Province,and to provide basis for the weed control in citrus garden,the weed species and their distribution were surveyed in Zhijiang City,Yidu City and Zigui County in Yichang of Hubei Province by five points sampling method.The results showed that there were 87 weed species belonging to 35 families in citrus garden in Yichang.The dominant species were Polypogon fugax,Conyza Canadensis,Oxalis corniculata.Acatypha austrdis,Veronica persica and Sedum bulbiferum.Weeds with high frequency ranked as Conyza Canadensis,Oxalis corniculata,Acatypha austrdis,Veronica persica,Youngia heterophylla and Erigeron annuus.The most noxious weed species were Polypogonfugax,Conyza Canadensis,Oxalis corniculata and Calamintha gracilie.Weed control should focus on them.The altitude had certain influence on weed species and their distribution.There were more weed species in low altitudes areas.