秧龄和栽插密度对水稻生物学特性的影响

Effects of Rice Seedling Age and Transplanting Density on the Biological Characteristics of Rice

以水稻品种扬两优6号为材料,研究大田条件秧苗的秧龄及栽插密度对水稻生物学特性的影响。结果表明:当秧苗秧龄处于35～55 d和栽插密度处于1.8×105～3.0×105蔸/hm2时,水稻分蘖盛期和幼穗分化期叶面积指数随着秧龄的增大而减小,随着栽插密度的增大而增大。秧龄对水稻单位面积有效穗数、每穗总粒数、实粒数和收获产量存在显著影响。栽插密度对水稻单位面积有效穗数和收获产量产生显著影响。而且,秧龄和密度的互作效应对水稻单位面积有效穗数产生显著影响。

Effects of rice seedling age and transplanting density on the biological characteristics of rice were examined using a rice cultivar,Yangliangyou6,in a field study.When rice seedling age was in the range of 35-55 d and transplanting density was in the range of 1.8×105-3.0×105 hills/ha,leaf area index（LAI） of rice at the mid-tillering stage and panicle initiation stage were decreasing as the increase of rice seedling age,however,increasing as the increase of transplanting density.There were significant differences in productive panicle per m2,total spikelet per panicle,solid spikelet per panicle and yield in the treatments of rice seedling age.Remarkable differences were found in the productive panicle per m2 and yield in the treatments of transplanting density.There was also noticeable effect of interaction between rice seedling age and transplanting density.