不同密度杂草稻对栽培稻群体形态特征及产量的影响

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

The experiment was carried out to transplant weedy rice WR03-12 in Shennong 265,the cultivated rice variety to study the effect of weedy rice on cultivated rice 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 m2,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 cultivated rice was three weedy rice plants per m2.The panicle and grain numbers decreased significantly,and seed-setting rate and 1000-grain weight slightly decreased under the competition of weedy rice.