混合盐(NaCl+NaHCO_3)和NaCl对黑果枸杞种子萌发和幼苗生长的影响

Effects of mixed salt (NaCl + NaHCO_3) and NaCl on seed germination and seedling growth of Lycium ruthenium Murr

用不同浓度混合盐(NaCl+NaHCO_3)、NaCl分别处理黑果枸杞种子,研究不同盐分对黑果枸杞种子发芽率、发芽势、发芽指数、活力指数、相对盐害率、复萌率和黑果枸杞幼苗鲜重、干重、含水量、根长、茎长及根茎比的影响。结果表明:与CK(对照)相比,随着混合盐(NaCl+NaHCO_3)浓度的增加,黑果枸杞种子发芽率、发芽势均为下降趋势,发芽指数、活力指数及幼苗根长、芽长、根茎比、鲜重、干重、含水量、复萌率呈先上升后下降的趋势,相对盐害率呈上升趋势。随着NaCl浓度的增加,黑果枸杞种子发芽率、发芽势、发芽指数、活力指数及幼苗根长、根茎比、干重、含水量呈先上升后下降的趋势,茎长、鲜重呈下降趋势,相对盐害率、复萌率呈上升趋势。黑果枸杞种子对混合盐(NaCl+NaHCO_3)和NaCl具有不同的耐受性,通过比较发现黑果枸杞种子对NaCl耐受性较强。黑果枸杞幼苗在混合盐(NaCl+NaHCO_3)处理下生长情况好于NaCl处理,说明黑果枸杞幼苗更适应在混合盐(NaCl+NaHCO_3)环境中生长。

Lycium ruthenicum Murr seeds were treated with different concentrations of mixed salt(NaCl+NaHCO3)and NaCl respectively.The effects of different salts on germination rate,germination potential,germination index,vigor index,relative salt damage rate,recovery percent and fresh weight,as well as dry weight,water content,root length,shoot height and root/shoot ratio of Lycium ruthenicum seedlings were studied.The results showed that:compared with control,with the increase of mixed salt(NaCl+NaHCO3)concentration,the germination rate and germination potential of Lycium ruthenicum seeds showed a downward trend.The germination index,vigor index,root length,shoot height,root/shoot ratio,fresh weight,dry weight,water content and recovery percent of Lycium ruthenicum showed a trend of increasing firstly and then decreasing,while the relative salt damage rate showed an upward trend.With the increase of NaCl concentration,the germination rate,germination potential,germination index,vigor index and seedling root length,root/shoot ratio,dry weight and water content of Lycium ruthenicum showed a trend of increasing firstly and then decreasing,while the shoot height and fresh weight showed a trend of decreasing,while the relative salt damage rate and recovery percent showed an increasing trend.Lycium ruthenicum seeds have a different tolerance for mixed salt(NaCl+NaHCO3)and NaCl.Through comparison,it is found that Lycium ruthenicum seeds have a stronger tolerance to NaCl.The growth of Lycium ruthenicum seedlings under mixed salt(NaCl+NaHCO3)treatment was better than that under NaCl treatment,which indicated that Lycium ruthenicum seedlings are more suitable for growth under mixed salt(NaCl+NaHCO3)environment.