【作者】 刘秀； 徐凤； 杨德亮； 张闯； 杨杰； 吴明根；

【Author】 Liu xiu;Xu feng;Yang deliang;Zhang chuang;Yang jie;Wu minggen;Agricultural College of Yanbian University;

【机构】 延边大学农学院；

【摘要】 东北稻区杂草稻是与栽培稻共生的一种杂草型稻类,但其生境、迁入与扩散途径、分布区域等特征与稻田杂草类有很大区别,且受很多局限性。东北稻区自生杂草稻抽稳后60天的种子发芽率超过90%;种子越冬能力和耐低温、耐旱生存能力强于栽培稻而弱于稻田杂草类种子;东北稻区稻田落粒的杂草稻种子只能以"干态"越冬,"湿态"不越冬,越冬能力介于杂草类与栽培稻之间。混于稻种流通是东北稻区杂草稻传播、迁入稻田的主途径;稻田土壤轻型化耙地和秋季稻田早断水是助长稻田杂草稻大发生主要原因;晚秋初冬降水量、气温决定翌年杂草稻发生程度,秋翻或秋灌可以冻死稻田落粒的杂草稻种子。更多还原

【Abstract】 The weedy rice could grow with cultivated rice in paddy of northeast China,Which was very different from weeds such as distribution characteristic,the immigration and spreading way and occurrence in rice field.The seed germination percentages were more than 90%at 60 th days after heading.The ability of resistance to overwinter,low temperature and drought are stronger than cultivated rice seeds and weaker than weed seeds.The fallen seeds which have a low water content can overwinter,but which have a high water content can’t overwinter in the paddy fields in Northeast of China.Spreading and immigrating with rice seeds was the main way for weedy rice seeds,the light-weight ploughing of paddy soils,in late autumn without water were the main reasons to fueling the large growth weedy rice.The rainfall and temperature in late autumn and early winter decides the occurrence of weedy rice in the next year.更多还原