摘要
为了解免耕油菜田杂草发生情况,于2006-2008年对免耕油菜田田间杂草发生规律进行了调查,并对2008-2009年免耕油菜田田间杂草不同时期出苗情况进行了统计分析。结果表明:稻茬免耕油菜移栽时,田间杂草已开始发生,发生初期以阔叶杂草为主,以后保持相对稳定的数量状态。禾本科杂草在当年12月初发生数量开始显著增加,至翌年2月底或3月初数量达到最高峰,形成免耕油菜田田间主要优势种杂草。禾本科杂草与阔叶杂草田间均有2次出苗高峰:禾本科杂草第1次在当年的11月中旬至12月中旬,第2次在翌年2月上旬至中旬,10-12月出苗量占总出苗量的66.58%;阔叶杂草第1次在当年10月下旬至11月上中旬,第2次在12月中旬,10-12月出苗量占总出苗量的74.49%。10-12月杂草群体出苗量占总出苗量的70.59%。稻茬免耕油菜田田间杂草出苗期期主要集中在当年10-12月。
To study the weed occurrence regulation of non-tillage rapeseed in rice filed,the weed investigation was undertaken from 2006 to 2008,and the statistic analysis was taken for the weed germination from 2008 to 2009.The results showed that the weed occurred before the transplanting of non-tillage rapeseed,and the wide leaf weed was dominant at the beginning and keep a stable population.Population of gramineae weeds started increase in December and reached the peak at February to March next year,and became the dominant species in the field.There were two peaks for both wide leaf weeds and gramineae weeds,the first peak of gramineae was in mid-November and mid-December,and the second was in early and middle of February in the following year,and the germination in October to December was 66.58% of the total germination.For the wide leaf weeds,the first peak was in end-October to early and middle November,second was in mid-December,and the germination in October to December was 74.49% of the total germination.Therefore,October to December was the dominant germination stage with 70.59% of the germination rate in the total weed population.
出处
《贵州农业科学》
CAS
北大核心
2009年第9期99-101,共3页
Guizhou Agricultural Sciences
基金
贵州省农业科学院院专项"免耕油菜田杂草防除技术研究与示范"[院2X(2007)009]
贵州省带帽项目"贵州省主要农作物病虫害预测预报及防控技术研究"[黔科合带帽字(2008)5002]
关键词
免耕油菜
杂草
发生规律
油菜田
non-tillage rapeseed
weed
occurrence regulation
rape field
