论文部分内容阅读
目的:明确重庆南川玄参杂草种类、危害情况和群落结构。方法:2013~2014年,采用倒置“W”九点取样法对南川玄参杂草进行调查。结果:南川玄参农田杂草有96种,隶属于30科75属,其中菊科最多,为18种,占整个杂草种类的18.75%;其次是禾本科,10种,占整个杂草种类的10.42%。所有杂草中,一年生杂草57种,占所有杂草的59.38%,越年生(两年生)及多年生杂草39种,占所有杂草的40.63%。一年蓬、马唐、窃衣、尼泊尔蓼、毛茛、繁缕、鸭跖草等在田间分布较广,是南川玄参农田的优势杂草。结论:重庆南川玄参农田杂草种类组成、群落结构的不同,主要与土壤理化性质、水分含量、种植制度、耕作方式、气候条件、作物布局、除草水平等有密切关系。
Objective: To determine the species, damage and community structure of Scrophulariaceae in Nanchong, Chongqing. Methods: From 2013 to 2014, the weeds of Nanchuan hygroscopicus were investigated by inverted “W ” nine-point sampling method. Results: 96 species of Scrophularia ningpoensis were found in farmland, belonging to 30 genera and 75 genera, of which 18 were Compositae, accounting for 18.75% of the total weeds; followed by Poaceae and 10 species, accounting for the entire weed species Of 10.42%. Among all weeds, 57 annual weeds, accounting for 59.38% of all weeds, perennial (biennial) and perennial weeds 39, accounting for 40.63% of all weeds. Year Peng, Crab, steal clothing, Nepal Polygonum, buttercup, chickweed, Commelina are widely distributed in the field, is the dominant Nanchuan Scrophulariaceae weeds. CONCLUSION: The species composition and community structure of Scrophulariaceae in Nanchuan of Chongqing are mainly related to soil physical and chemical properties, water content, planting system, tillage mode, climatic conditions, crop layout and weed control.