论文部分内容阅读
运用倒置“W”9点取样法 ,对黑龙江省北部大豆小麦轮作区小麦田做杂草调查。结果表明 ,该地区小麦田杂草有 13科 31种。其中阔叶杂草占 83.9% ,禾本科杂草占 12 .9% ,木贼科 1种 ,占3.2 %。相对多度达 10以上的杂草依次为 ,鸭跖草、香薷、卷茎蓼、问荆、野燕麦、铁苋菜、野薄荷、刺儿菜、鼬瓣花、藜、稗草、苣荬菜、垂梗繁缕等 13种。其中前 5种相对多度达 2 0以上 ,可视为当地小麦田的优势杂草。
Using the inverted “W” 9-point sampling method, a weed survey was conducted on wheat fields in the northern part of Heilongjiang Province. The results showed that there were 13 families and 13 species of weeds in wheat field in this area. Among them, broad-leaved weeds accounted for 83.9%, gramineous weeds accounted for 12.9%, Equisetum a species, accounting for 3.2%. The relative abundance of weeds of over 10 were as follows: Commelina communis, Fragrant pomfret, Polygonum viviparum, Vitexin, wild oats, iron amaranth, wild mint, Sarcandra guttata, Mustela flower, quinoa, barnyardgrass, , Hanging stems, etc. 13 kinds of plumeria. Among them, the top five relative abundance of more than 20, can be regarded as the advantages of the local wheat field weeds.