以不同株型水稻品种为材料,研究了混插其中杂草稻的生长状况.在两种杂草稻密度下,相对于分蘖中等、直立穗型沈农265,分蘖力强、大冠层、弯曲穗型辽盐16都能显著降低移栽稻田中杂草稻的株高、叶面积指数、分蘖、植株干物重.在12株/m~2杂草稻干扰下,齐穗期沈农265的有效穗数、叶面积指数、干物重明显下降,这些最终会导致其产量的下降,而辽盐16的穗数、干物重等因子下降并不明显.在两种株型中,辽盐16对杂草稻竞争力强,这对农业生产中杂草稻的防治具有重要的指导意义.
The growth character of weedy rice in mixture transplanting with different morphological type rice varieties were studied.Compared with Shennong 265 with erect panicle type,tiller of average ability,Liaoyan 16 with the plant morphological type of curved panicle,tiller of stronger,great-canopy reduced the plant height,1eaf area,plant dry weight,the number of tillers of weedy rice significantly in the transplanted rice.The number of rice panicles,1eaf area index and dry matter weight of Shennong 265 were decrease seriously under weedy rice interferenee of 12 plants per square meter,which can result the yield of rice decline.However,the yield components of Liaoyan 16 was no decrease markerly.The competition of Liaoyan 16 between two plant morphology rice varieties was more powerful compared with the Shennong 265.It will be important in the agricultural program of control weedy rice.
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