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Position: Home > Articles > Different weeds year-type occurrence law and discriminate analysis in rapeseed fields of Shanghai Chinese Journal of Oil Crop Sciences 2003,25 (1)

上海地区油菜田不同年型杂草种群发生规律及判别分析

作  者：
顾品强;汪祖国;王桂云
单  位：
上海市奉贤区农业技术推广中心;上海市松江区农业技术推广中心;上海市奉贤区气象局
关键词：
油菜;禾本科杂草;阔叶类杂草;年型;发生规律;判别分析
摘  要：
根据 1992— 2 0 0 2年稻茬免耕油菜田禾本科和阔叶类杂草自然发生量观测资料分析 ,将禾本科杂草划分为偏多发生年、中等发生年和偏少发生年 3种年型 ,阔叶类杂草划分为偏多发生年和偏少发生年 2种年型 ,不同年型杂草种群发生规律和危害程度存在差异。采用 0 - 1型投票法对禾本科和阔叶类杂草发生年型作判别分析 ,预报总体准确率分别为 81.8%和 10 0 %。
译  名：
Different weeds year-type occurrence law and discriminate analysis in rapeseed fields of Shanghai
作  者：
GU Pin-qiang1, WANG Zu-guo2, WANG Gui-yun3 (1. Fengxian District Meteorological Office, Shanghai 201403, China; 2. Fengxian District Agrotechnology Extension Center, Shanghai 201400, China; 3. Songjiang District Agrotechnology Extension Center, Shanghai 201600, China)
关键词：
Rapeseed; Grass weeds; Broad leaved weeds; Weeds occurrence year-type; Occurrence law; Discriminate analysis
摘  要：
Based on analysis of the observations data of natural occurrence of grass weeds and broad leaved weeds, no-tillage rice stubble rapeseed field during 1992-2002, grass weeds occurrence were classified 3 year-type, such as the years of occurrence of 15% more than average value, 15% lower than average value and secondary occurrence, and broad leaved weeds occurrence were classified 2 year-type, the years of weeds occurrence over average value and the years of occurrence lower average value. Weeds occurrence law and damage degree of different weeds year-type existed difference. Using a ballot 0-1 type ways to occurrence year-type of grass weeds and broad leaved weeds were discriminate analysis, overall, rates of predictive accurate were 81.8% and 100% respectively.

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