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旱田稗属杂草在黑龙江东部垦区近2000万亩耕地中,出现频率为100%。其大量草籽混杂于耕层各个深度,给大面积机械化生产构成潜在威胁。稗草能与作物剧烈争夺养分、水分、温度、光照,每个生产年度均投入大量机械、人力和化学药剂进行防除,影响生产建设,增高粮食成本,加大经济损失。稗属杂草最适防治期是春季的萌动、幼芽、出苗至二叶期。此时对水分、温度、光照最敏感。在郁闭情况下,生长势极弱。机械、化学防治效果均受耕地土壤水分动态限制。制定防除措施必须应用综合手段,以便因时因地应用。
Echinochloa weeds in the dry land in the eastern part of Heilongjiang nearly 20 million mu of arable land, the frequency of 100%. Its large amount of grass seeds mixed with each depth of tillage, to a large area of mechanized production poses a potential threat. Barnyardgrass can compete fiercely with crops for nutrients, moisture, temperature and light. Every year of production, large quantities of machinery, manpower and chemical agents are put into control and production and construction are affected. The cost of grain is increased, and the economic losses are increased. Echinochloa weed prevention and control of the best spring germination, shoots, emergence to the second leaf period. At this point on the moisture, temperature, light the most sensitive. In the closed situation, the growth potential is very weak. The mechanical and chemical control effects are all limited by the soil moisture dynamic of cultivated land. The development of prevention and control measures must be applied comprehensive means, so that due to local application.