摘要
通过室内试验研究温度、土壤含水量、水层和土层深度对马唐萌发和生长的影响。结果表明，马唐最适萌发温度为25-35℃，最低萌发温度为10-15℃，最高萌发温度为40～45℃；马唐萌发最适土壤含水量为40％，土壤含水量低于10％、大于50％时，萌发率显著降低；水层对马唐影响较大，水层处理可显著降低马唐的出苗率；随着土层深度的增加，马唐出苗率逐渐降低，土层深度〉7cm则马唐不能出苗。
The effects of environmental factors including temperature, soil water content, and water and soil depth on germination and growth of Digitaria sanguinalis was studied in the laboratory. The optimum temperature for D. sanguinalis germination was 25 -35 ℃ ,the lowest germination temperature was 10 - 15 % ,and the highest temperature was 40 - 45 ℃. The optimum and lowest soil water content for germination was 40% and less than 10% ,respectively;above a soil water content of 50%, germination rate decreased significantly. Water depth had some effect on D. sanguinalis,its emergence rate was significantly reduced by different water depth treatments;emergence rate declined as soil depth increased, and no emergence was observed when the soil depth was over 7 cm.
出处
《杂草科学》
2014年第2期1-4,共4页
Weed Science
基金
上海市科委重点科技攻关项目(编号:11dz1960102)
上海市科技兴农推广项目[编号:沪农科推字(2012)第1-4号]
关键词
马唐
生物学特性
农业防除
环境因素
萌发
生长
Digitaria sanguinalis
biological characteristics
agricultural control
environmental factors
germination
growth
