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 %。
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.
出处
《中国油料作物学报》
CAS
CSCD
北大核心
2003年第1期59-62,共4页
Chinese Journal of Oil Crop Sciences
基金
上海市科技兴农重点攻关项目 ( 2 0 0 1- 2- 6 )
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
Rapeseed
Grass weeds
Broad leaved weeds
Weeds occurrence year-type
Occurrence law
Discriminate analysis
