江苏金坛茶园春季主要杂草发生危害调查研究

采用"M"形9点取样法定块调查,结果表明,金坛茶园春季杂草有40种。其中:禾本科杂草4种,占10.00%;阔叶杂草31种,占77.50%;莎草科杂草1种,占2.50%;其他杂草4种,占10.00%。多年生杂草14种,占35.00%。阔叶杂草中藤本杂草3种,占阔叶杂草的9.68%。分析比较了新、老茶园春季优势杂草的种群种类、数量区别,明确了茶园春季杂草群落组成。春季杂草相对多度大于5%的优势杂草有菵草、一年蓬、猪殃殃、繁缕、野老鹳草、酢浆草、婆婆纳、荠菜、卷耳、泥湖菜、巢菜、小飞蓬、飞廉、鼠麹、早熟禾、碎米荠、附地菜。

Investigation on Occurrence and Harm of Main Weeds in Spring in Jintan Tea Garden of Jiangsu

A survey of main weed species in spring was conducted through M-pattern 9-point sampling in Jintan tea garden.The results showed that there were 40 weed species.Among them,gramineous weeds had 4 species,accounting for 10.00%;broadleaf weeds had 31 species,accounting for 77.50%;Cyperaceae weed had 1 species,accounting for 2.50%;other weeds had 4 species,accounting for 10.00%.There were 14 perennial weed species,accounting for 35.00% of 40 weed species.There were 3 liane weed species,which accounted for 9.68% of broadleaf weed species.The species and population density of the dominant weeds in spring were compared between new tea garden and old tea garden,and the structure of weed community in spring in tea garden was ascertained.The spring dominant weeds with above 5% relative abundance included Beckmannia syzigachne,Erigeron annuus,Galium aparine,Stellaria media,Geranium carolinianum,Oxalis corniculata,Veronica didyma,Capsella bursa-pastoris,Xanthium sibiricum,Hemistepta lyrata,Vicia sativa,Conyza canadensis,Carduus crispus,Gnaphalium affine,Poa annua,Cardamine hirsute and Trigonotis peduncularis.