不同密度杂草稻对栽培稻群体形态特征及产量的影响  

The Effect of Weedy Rice with Different Density on Morphological Characters and Yields of Cultivated Rice Population

作　　者：杨庆[1] 马殿荣[1] 宋冬明[1] 陈温福[1] 

机构地区：[1]沈阳农业大学水稻研究所

出　　处：《北方水稻》2008年第5期28-31,共4页North Rice

基　　金：国家自然科学基金(30671262);教育部博士点基金(20060157003);辽宁省教育厅科研计划资助项目(20060779)

摘　　要：在沈农265田中插入不同密度的杂草稻WR03-12,研究杂草稻对栽培稻生产的影响。结果表明:杂草稻的竞争对栽培稻的叶片长宽和株高影响不大,对栽培稻的产量影响较大,在9、7、5、3、1株杂草稻/m2处理中,栽培稻分别减产44.65%、36.89%、24.67%、17.58%、1.37%,其中使栽培稻显著减产的最低密度为3株杂草稻/m2。杂草稻的竞争使栽培稻的穗数和穗粒数显著减少,结实率和千粒重略有降低。The experiment was carried out to transplant weedy rice WR03-12 in Shennong 265, the cultivated rice variety to study the effect of weedy riee on cultivated riee production. The results showed that the competition of weedy rice insignificantly influenced on leaf length, leaf width and plant height of Shennong 265, but significantly on. yield. Among the treatment of nine; seven, five, three and one weedy rice per m^2, the yields of Shennong 265 decreased by 44.65%, 36.89%, 24.67%, 17.58%, 1.37%, respectively. The lowest density of weedy, rice which caused significant yield reduction of euhivated rice was three weedy rice plants per m^2. The panicle and grain numbers decreased significantly, and seed-setting rate and 1000-grain weight slightly decreased under the competition of weedy rice.

关 键 词：杂草稻 栽培稻 产量 

分 类 号：S352.3[农业科学—作物栽培与耕作技术]