播种量与秧龄对秧苗素质及其垄作梯式栽培产量的影响

摘要

以湘晚籼13号为材料，于2013年在浏阳市北盛镇乌龙社区肥力均匀的稻田自然丘块上，研究播种量与秧龄对秧苗素质及其垄作梯式栽培产量的影响。结果表明：在20～40 d秧龄，均以30 d秧龄的秧苗素质最好；同一秧龄下，随着播种量的增加，株高和单株叶面积均降低，根系活力与发根力在低播量下最强，株高受播种量影响不显著。垄作梯式栽培产量表现为秧龄越短，产量越高。40 d长秧龄不利于每穗总粒数与结实率的增加，减产严重。秧龄20 d的水稻产量比秧龄30 d的产量稍高。%With rice variety Xiangwanxian13 as test material,this paper investigated the effect of seeding amount and seed-ling age on seedling quality and grain yield under ridge&terraced cultivation in the natural fertility of paddy uniform mound on the block in the town of Liuyang Beisheng Own Community in 2013.The results showed that,during the seedling age from 20 days to 40 days,the seedling quality of those with 30 days seedling age was the best,the plant height and leaf area per plant decreased with the increasing of seedling amount,root activity and rooting ability in low seeding was the strongest and plant height was not significantly affected by seeding rate.The yield showed increase trends with the shortening of seedling age.Seedling age of 40 days was unfavorable to the total grain number per panicle and seed setting rate and caused serious reduction of output.Yields under 20 days seedling age was relatively higher than that of 30 days seedling age.