【作者】 李贵； 朱展飞； 王晓芸； 王一专； 刘丽萍； 吴竞仑；

【Author】 LI gui;ZHU zhan-fei;WANG xiao-yun;WANG yi-zhuan;LIU Li-ping;WU Jing-lun;Institute of Plant Protection,Jiangsu Academy of Agricultural Sciences;School of Horticulture and Plant Protection,Yangzhou University;

【机构】 江苏省农业科学院植物保护研究所； 扬州大学园艺与植物保护学院；

【摘要】 通过不同密度杂草稻对栽培稻株高、茎高、叶片数以及剑叶叶面积影响的测定,表明杂草稻与栽培稻共生3周左右即对栽培稻株高、茎高、叶片数产生不同程度的抑制作用,共生1周甚至就对栽培稻的剑叶叶面积产生明显的抑制作用,并且有随着杂草稻密度以及杂草稻—栽培稻共同生长时间的延长,抑制作用有逐渐增加的趋势。杂草稻对栽培稻播后早期的竞争抑制作用再次强调了早期杂草稻控制的必要性以及苗床准备和苗后早期杂草稻控制的重要性。同时表明剑叶叶面积作为功能叶片的重要指标可更加快速显示栽培稻播种后杂草稻对栽培稻的抑制作用,该指标在栽培稻—杂草稻竞争关系中具有更加重要的意义。更多还原

【Abstract】 Pot experiments were employed to examine influence of different density weedy rice on cultivated rice growth and development.The results showed that weedy rice could inhibit the plant height,stem height and leaf number of cultivated rice after 2~3 weeks when they co-existed,and even after 1 week when they coexisted the weedy rice could remarkably inhibit the flag leaf area of cultivated rice.In addition,inhibition of weedy rice on cultivated rice became more and more serious with the increase of weedy rice density and the prolongation of co-existence.The competitive advantage of weedy rice at the early stage after cultivated rice emergence also indicated that it was necessary to control the weedy rice as early as possible.Moreover,it was more sensitive that the inhibition on the flag leaf area of cultivated rice than the plant height and stem height.So,flag leaf area of cultivated rice maybe have more distinct indication in the relation of the rice and weed.更多还原