摘要
采用田间小区试验,研究禾本科杂草、阔叶杂草、混合杂草自然生长区及无草区等不同杂草群落对油菜生长及产量损失的影响。结果表明:杂草的生长发育受土壤等环境条件的影响,不同地方不同年份油菜田杂草发生种类和数量有较大差异;各杂草群落对油菜株高影响不显著,但对油菜产量损失的影响显著。在杂草自然生长区,翻耕田和免耕田不同杂草群落对油菜产量损失的影响表现出相同的规律性,油菜产量损失率由高到低依次为:混合杂草>阔叶杂草>禾本科杂草。
The effect of natural growth zone of grass weeds ,broadleaf weeds,and mixed populations on rape growth and yield was studied by the field plot test .Weed growth was affected by soil and other environmental conditions , thus the density and composition of weeds associated with rape differed among regions and years .Rape plant height was not affect-ed by the different weed communities but crop yield was negatively impacted .Regardless of the tillage or no -tillage,the effect of the different weed communities on rape yield losses rape demonstrated a same pattern in control -free plots. Yield loss rate of rape decreased in presence of weed in the following order：mixed weeds＆gt;broadleaf weeds ＆gt;gramineous weeds .
出处
《杂草科学》
2014年第1期30-33,共4页
Weed Science
基金
公益性行业(农业)科研专项(编号:200903004)
关键词
油菜
杂草
危害
产量损失
rape
weed
plant height
yield loss
