湖南农业大学学报（自然科学版）2018，Vol.44Issue(1)：45-50,6.DOI:10.13331/j.cnki.jhau.2018.01.009
环境因子和播种深度对南荻种子萌发及幼苗生长的影响
Effect of environmental factors and sowing depth on seed germination and seedling growth of Miscanthus lutarioriparius
摘要
Abstract
Effects of environmental factors and sowing depth on the germination and seedling growth of Miscanthus lutarioriparius, an endemic species in central China and a promising potential energy crop, were researched based on set up different treatments including temperatures, illuminations, soil moistures, growth hormones and sowing depths by means of adopting germination rate, germination potential, germination index, vigor index, length of plumule and radicle as indicators. The result indicated that the M. lutarioriparius seed belongs to high temperature type, and the optimal temperature for its germination was range from 30 ℃ to 35 ℃. With temperature increasing,the growth of plumule tended to rising at first, and then dropping, while the growth of radicle was always rising. Illumination time had significant effect on germination and seedling growth, 24 h of illumination was the most appropriate for seed germination and seedling growth. The optimal soil moisture for seed germination was 15％, while, the growth of plumule was insignificantly influenced by soil water content. The seed germination rate and germination potential was in their greatest in soaking 200 mg/L 6-BA solution. With sowing depth increasing, the germination rate, germination potential, germination index and vigor index were significantly decreased. The seedling height and root length were significantly restrained by soil cover depth, swallow seedling was beneficial to seed germination and seedling growth. Briefly, environmental factors have significant effects on seed germination and seedling growth, soil fertility should also be enhanced through implementing corresponding management strategies.关键词
南荻/发芽/温度/光照/土壤含水量/激素/播种深度Key words
Miscanthus lutarioriparius/seed germination/temperature/illumination time/soil water/hormone/sowing depth分类
农业科技引用本文复制引用
向明龙,易自力,郑铖,项伟,肖亮..环境因子和播种深度对南荻种子萌发及幼苗生长的影响[J].湖南农业大学学报（自然科学版）,2018,44(1):45-50,6.基金项目
湖南农业大学国家重点实验室培养基地开放项目(15KFXM02) （15KFXM02）
