摘要
为探究不同光照强度对新疆野苹果(Malus sieversii)种子萌发和幼苗生长的影响。在100%自然光照(NS)、41.24%NS、8.37%NS、1.46%NS 4个光照强度处理下测定种子萌发率、萌发指数、萌发起始时间及幼苗株高、基径、主根长、叶片数、生物量。结果表明,不同光照强度处理下新疆野苹果种子萌发率、萌发指数和萌发起始时间差异不显著(P>0.05)。100%NS和41.24%NS处理下幼苗存活率显著高于1.46%NS处理(P<0.05)。比叶面积和株高随光照强度的降低而增加,基径和叶片数随光照强度的增加而增加。幼苗根、茎、叶生物量和总生物量随光照强度的增加而增加。新疆野苹果种子萌发不受光照限制,光照是影响新疆野苹果幼苗生长的重要环境因子。
To explore the effects of different light intensity on seed germination and seedling growth of Malus sieversii.Seed germination percentage,germination index,germination initiation time,seedling height,basal diameter,taproot length,leaf number and biomass were measured under four light intensity treatments of 100%natural sunlight(NS),41.24%NS,8.37%NS and 1.46%NS.The results showed that:There was no significant difference in seed germination percentage,germination index and germination initiation time of M.sieversii under different light intensities(P>0.05).The survival rate of seedlings treated with 100%NS and 41.24%NS was significantly higher than that treated with 1.46%NS(P<0.05).The specific leaf area and seedling height increased with the decrease of light intensity,while the basal diameter and leaf number increased with the increase of light intensity.The root,stem and leaf biomass and total biomass of seedlings increased with the increase of light intensity.Therefore,light was not an important environmental factor limiting M.sieversii seed germination,but an environmental factor affecting the growth of M.sieversii seedlings.
作者
张宗芳
徐将
师小军
ZHANG Zong-fang;XU Jiang;SHI Xiao-jun(College of Life Sciences,Xinjiang Agricultural University,Urumqi 830052,China)
出处
《新疆农业大学学报》
CAS
2021年第6期401-406,共6页
Journal of Xinjiang Agricultural University
基金
国家自然科学基金项目(31960229)
新疆维吾尔自治区自然科学基金项目(2017D01B17)。
关键词
新疆野苹果
光照强度
种子萌发
幼苗生长
Malus sieversii
light intensity
seed germination
seedling growth
