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对杂草稻几种典型性状及危害特性进行了分析。结果表明,危害重的杂草稻落粒性不一定比常规稻强;刚收获的杂草稻种子有一定的休眠期且种子活性期长,而常规稻无休眠期且种子活性期有限;上年杂草稻多的田块,若不采取措施,直播稻、套播稻田杂草稻的危害可达28%以上,甚至99%以上;埋于土下未出苗的杂草稻及常规种子经1季水稻生长后,会碳化而失去活力;采用诱发杂草稻,在前茬小麦收获后及时用41%草甘膦3 000 ml/hm2杀灭已出苗的杂草稻,可有效防止杂草稻的危害及蔓延。
Several typical traits of weedy rice and their harmfulness were analyzed. The results showed that the pest damage of weedy rice was not necessarily worse than that of conventional rice. The weedy rice just harvested had some dormancy period and long seed activity, but the conventional rice had no dormancy period and limited seed activity period. In weeds and more paddy fields, without measures, direct-seeded rice, interplanted rice paddy weeds up to 28%, or even more than 99% of the damage; buried in the soil under the emergence of weedy rice and conventional seeds In the first season, the rice will be carbonized and lose its vitality after it grows. By using weedy rice to kill weedy rice with 41% glyphosate 3000 ml / hm2 immediately after the harvesting of the previous crop, the weed can be effectively prevented Harm and spread of rice.