边缘热带蔓花生草坪杂草种类调查及化学防除

Weed species investigation and chemical control of Arachis duranensis lawn in edge of tropical

为了解处于边缘热带的湛江市区蔓花生草坪的杂草现状,并提供有效的化学防除方法,首先采用样线法及随机抽样法,对各种杂草所占的比例和生物量进行调查;其次,采用样圈法调查各种杂草的频度;用3种除草剂分别喷洒,7d后观察杂草的变化。市区曼花生草坪杂草共有20科35种,其中,种类较多的是禾本科,菊科,茜草科,蓼科,苋科,酢浆草科等;出现频度较高的是水蜈蚣,马唐,空心莲子草,酢浆草,红花酢浆草等。蔓花生草坪杂草生物量占群落总生物量的11.20%,平均盖度为16.25%,杂草频度最高是酢浆草60%,最低的杂草频度也在20%。采用喷洒加涂抹除草剂的方法防除杂草效果好,其中,威霸除草剂的防除效果最好,精喹禾克次之,丰山盖草灵效果一般。

Weeds species and biomass were investigated and controlled by spraying three herbicides at Arachis duranensis lawn in edge of tropical region.The results showed that there were 35 weed species,which belonged to 20 families,and most of species belonged to Gramineae,Compositae,Rubiaceae,Polygonaceae,Amaranthaceae.Kyllinga cororata,Digitaria sanguinalis,Alternanthera philoxeroides and Oxalis corymbosa,showed highly frequency.Weeds biomass took up 11.20% of the total biomass while average coverage was 6.25%.The treatment of spraying plus daubbing herbicide was effective way to control weeds.The brand of Whip super was the best herbicides for weed control,followed by quizalofop-p-ethyl.