摘要
从单种、套种两种种植模式出发,初步探讨天敌、害虫在单种、套种两种基本模式下的发生规律,解决苜蓿种植模式调整后对苜蓿害虫影响情况不清造成苜蓿受害情况不明的问题,为指导宁夏地区牧草种植模式调整,促进苜蓿增产提供理论依据。采用网捕、诱集等方法搜集整理田间害虫、天敌种类和数量,通过典型性相关分析法对数据进行分析。结果表明:不同栽培模式下苜蓿草地中昆虫种类与个体数的差异很大,单种的苜蓿草地中害虫发生量普遍高于套种的苜蓿草地;单种的苜蓿草地中主要害虫的个体数普遍高于套种的害虫,优势天敌也同样表现出这种分布规律;单种的苜蓿草地生境中昆虫的总个体数、植食性昆虫的个体数以及捕食性昆虫的个体数都明显高于套种的苜蓿草地。套种苜蓿虫害、天敌变动规律较为复杂,除了种植模式之外,还需要采取多种手段防范因外部虫源引入造成的集中暴发。
Abstract：The paper studied the occurrence pattern of the pests and their natural enemies in the alfalfa land with intercropping and monoculture. The study used the sweeping net and pitfall trap to collect insect samples. Results showed that the abundance and species of insect had a significant differences in different planting pattern of alfalfa. Pest damage was more serious in monoculture fields than that in intercropping fields. Furthermore, the abundance of natural enemies was higher in monoeulture fields than that in intercropping fields. In contrast, the community of insect was complex in intercropping alfalfa fields, which indicated that multiple management should be incorporated to protect alfalfa from pest damage.
出处
《草原与草坪》
CAS
2013年第6期25-29,共5页
Grassland and Turf
基金
国家公益性行业(农业)科研专项项目(201003079)
国家牧草产业体系盐池综合试验站(CARS-35-42)资助
关键词
苜蓿
生态位
自然控制
栽培模式
群落结构
alfalfa ；niche ；natural control ；cultivation model ；community structure
