摘要
分析不同播种深度与土壤水分含量对川牛膝(Cyathula officinalis Kuan)种子出苗率及幼苗生长的影响,探寻适宜的播种深度与苗床土壤水分含量.通过盆栽试验,设置不同的播种深度与土壤水分含量处理,通过称重进行补水,测定发芽势、出苗率及幼苗生长与生理指标.结果表明,播种深度与土壤水分含量对种子出苗率及幼苗生长有显著影响.播种深度为0.31～0.61 cm时,种子发芽势与出苗率较高;播种深度为0.61～0.92 cm时,幼苗叶片叶绿素含量高,抗逆性较好;土壤水分含量为60.71%时,种子发芽势与出苗率较高;土壤水分含量为53.35%～60.71%时,幼苗长势较旺;土壤水分含量为38.62%～53.35%时,幼苗抗逆性较好;土壤水分含量为45.98%～53.35%时,幼苗叶片叶绿素含量较高.川牛膝种子适宜播种深度为0.61 cm,播种后土壤水分含量保持在60.71%左右,可以获得较高出苗率,出苗较整齐;出苗后,土壤水分含量保持在53.35%左右,幼苗长势旺盛,叶片叶绿素含量高,抗逆性好.
Abstract
By analyzing and comparing the effects of different sowing depth and soil water content on the seed rate of emergence and seedling growth of Cyathula officinalis,the suitable sowing depth and water content of seedbed soil were explored.The pot experiment was carried out with different sowing depth and soil water content treatments.Water was replenished by weighing,and germination po-tential,rate of emergence,seedling growth and physiological indexes were determined.The results showed that the sowing depth and soil water content had a significant influence on the seed rate of emergence and seedling growth.The germination potential and rate of emergence were higher when the sowing depth was 0.31～0.61 cm.When the seeding depth was 0.61～0.92 cm,the chlorophyll content of seedling leaves was higher and the stress resistance of seedlings was better.The germination potential and rate of emergence were higher when soil water content was 60.71%.The seedlings grew better when soil water content was 53.35%～60.71%.The seedlings had better stress resistance when soil water content was 38.62%～53.35%.The chlorophyll content in seedling leaves was higher when soil water content was 45.98%～53.35%.The suitable sowing depth of Cyathula officinalis seeds was 0.61 cm.The rate of emergence was higher and the emergence was orderly when soil water content was about 60.71%.After seed emergence,the seedling grew vigorously,the chlorophyll content of leaves was higher,and the seedlings had better stress resistance when soil water content was about 53.35%.
基金项目
湖北省重点研发计划(2020BCA059)
湖北省农业科技创新中心重大科技研发项目(2020-620-000-002-04)
现代农业产业技术体系建设专项(CARS-21)
国家科技期刊平台
NSTL
万方数据