不同栽插密度对有色稻产量和群体质量的影响

以黑糯（Y4）和红粳（Y5）两个有色稻为材料，设5种不同的栽插密度，研究了不同栽插密度对有色稻群体质量和产量的影响。结果表明：栽插密度主要影响有效穗数进而影响产量。4万苗/666.7m2密度处理产量显著低于其他处理，密度在12～16万苗/666.7m2时，产量和成穗率较高，干物质积累多，说明适当提高栽插密度有利于提高有色稻产量和构建高产群体。本试验中Y4和Y5的适宜密度分别为12万苗/666.7m2和16万苗/666.7m2,且Y5耐密性较Y4强。

Effect of Different Density on Yield and Population Growth Quality in Colored Rice

Yield and population growth quality of colored rice were studied under five different densities with two colored rice of black glutinous (Y4) and red japonica (Y5).The results indicated that the density influenced yield mainly by changing the number of effective panicles. The 4×104 plant/666.7m2 treatment had a significant lower yield than the other treatments. The treatment with a density from 12×104 ~ 16 ×104 plant/666.7m2 had a higher yield and effective tiller rate. It is concluded that properly increasing the density was beneficial to improve the yield and to construct the population growth quality of colored rice. The suitable density of Y4 and Y5 is respectively 12×104 plant/666.7m2 and 16 ×104 plant/666.7m2, moreover, the durability to density of Y5 is stronger than Y4.