光照强度与土壤水分对新疆野苹果种子萌发及幼苗生存的影响

打开文本图片集

中图分类号：S661.1;S562.01 文献标识码：A 文章编号：1001-9499（2025）04-0001-06

Effects of Light Intensity and Soil Moisture on Seed Germination and Seedling Survival of Malus sieversii

MAYue YANG Yang ZHENG Feng QING Quan XU Lei LI Jiangui LIU Liqiang* （Xinjiang Agricultural University College of Horticulture，XinjiangUrumqi830052）

AbstractTo investigate the efects oflight intensity and soil water on the seed growth and propagation of Malus sieversi.Setup5light-treated shadesheds with O，1，2，3and4layers ofsunshade nets，and express the light intensity with the light transmission rate，which are 100% ， 41.67% ， 26.04% ， 9.21% and 2.42% ， respectively.Five water treatments with soil relative water content of 20% ， 35% ， 50% ， 65% and 80% were set.The seed germination，seedling growth and seedling survival rate were observed by the whole area group arngement experiment with2factors and5levels.Theresults showed that the interaction of light intensity and soil relative water content had significant effects on seed germination，seedling growth and survival of Malus sieversii.Underalllight treatments， 35%～65% soil moisture was suitable for seed germination.When the light intensity was lower than 9.21% and the soil relative water content was less than 50% and more than 80% ，the seed germination and seedling survival were significantly inhibited.Under the optimum conditions of 100% light intensity and 65% soil relative water content， the seed germination rate and seedling survival rateofMalus sieversii were thehighest.The increase of light intensity and soil moisture undera certain limit was beneficial to the growth of seedlings，and there were significant and extremely significant correlations among the indexes of seedlings.

Key wordsMalus sieversii; light intensity; soil water content; seed germination; seedling survival

植物在自然条件下的实生苗繁殖、生长与存活，是影响其种群空间分布和动态的决定性因素[1]，从种子至幼苗建植阶段，外界的光照、温度、土壤及水分等环境条件，对种子萌发、幼苗生长与生存的影响效果最为直接而显著[2];已有研究[2-5充分表明，环境条件中的光照强度与土壤水分的共同作用，对植物的种子萌发与幼苗生长起主导作用。（剩余7461字）