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通过1986、2006、2010年3次对安徽广德县300多块麦田的杂草普查结果表明,广德县小麦田草害一直较为严重,虽然20多年来田间主要杂草种类及群落类型变化较大,但禾本科杂草始终是麦田主要杂草。1986年前以看麦娘为主。2006年以后,主要杂草依次为日本看麦娘、菵草、看麦娘,阔叶草上升趋势明显,主要为老鹳草等;2010年日本看麦娘、菵草依然是麦田主要杂草,看麦娘数量减少,而老鹳草已经上升为第3位。2006年以后,杂草群落主要类型由以看麦娘为优势种组成的单优群落演变为由日本看麦娘、菵草、老鹳草等组成的单优群落和双优群落。据此,笔者提出适合当前现状的草害化学防除对策。
The results of weed surveys of more than 300 wheat fields in Guangde County, Anhui Province, three times in 1986, 2006 and 2010 showed that the grass weed in the wheat fields in Guangde County was relatively serious. Although the main weed species and community types changed more in the past two decades Large, but grass weeds have always been the main weed in the wheat fields. Before 1986 to see the mother-based. After 2006, the main weeds followed by Japan to see Amanita, razorgrass, see Amanita, broadleaf grass obvious upward trend, mainly for geranium, etc .; in 2010 Japan to Amanita, razorgrass is still the main wheat weeds , To see the number of Amargine reduced, and geranium has risen to No. 3. After 2006, the dominant types of weed community evolved from the single superior community consisting of the dominant species of Anemarrhena aslyseriforum and Shuangou community, which were mainly composed of Japanese maidenhair, hay, geranium and so on. Accordingly, the author puts forward the current situation of grass-roots chemical control measures.