新疆狗牙根制种田杂草调查研究

Investigation and Study on Weed Bermudagrass Seed Field in Xinjiang

通过对新农1号狗牙根和喀什狗牙根制种田内杂草种类、频度、密度及多度进行调查和统计分析,结果表明：杂草种类达17科61种,其中菊科杂草15种,占杂草总数的24.59%;禾本科杂草13种,占杂草总数的21.31%;一年生杂草34种,占杂草总数的55.74%;多年生杂草21种,占杂草总数的34.43%。3-4月是春季杂草发生高峰期,5-8月是夏季杂草发生高峰期,主要杂草有顶羽菊、田旋花、灰藜、野西瓜苗、狗尾草、稗、反枝苋、苦苣菜,发生频度在50%以上,密度在4.25株/m^2以上。

Investigation of the weed species,frequency and abundance in Cynadon dactylon（L.）pers CV xinnong NO.1 and Cynadon dactylon（L.） pers CV kashi Bermudagrass Seed field was carried out.The results showed that there were 61 species 17 families of weed species,of which there were 15 species of Compositae,which accounted for 24.59% of weed total,13 species of Gramineae,which accounted for 21.31%,34 species of annual weed,which accounted for 55.74%,21 species of perennial weed,which accounted for 34.43% of weed total,the peak hours of spring weed happened from March to April,summer weed peak hours happened from May to August,The primary weed species were Acroptilon repens,Convolvulus arvensis,Chenopodium album,Hibiscus trionum,Setaria viridis,Echinochloa crusgalli,Amaranthus retroflexus and Sonchus brachyotus,each of their frequency was more than 50% and density beyond 4.25 unit/m^2,They had severe effect on growth,seed-yield and seed-quality of Bermudagrass.