土壤pH对橡胶草生长及产量的影响  

Effect of Soil pH on Growth and Yield of Taraxacum kok-saghyz

作　　者：沈光[1,2] 魏殿文[2] 曾祥俊[3] 陈菲[2] 郑福云[2] SHEN Guang;WEI Dian-wen;ZENG Xiang-jun;CHEN Fei;ZHENG Fu-yun(Key Laboratory of Forest Plant Ecology,Ministry of Education,Northeast Forestry University,Harbin,Heilongjiang 150040;Institute of Natural Resources and Ecology,Heilongjiang Academy of Sciences,Harbin,Heilongjiang 150040;Heilongjiang Academy of Sciences,Harbin,Heilongjiang 150001)

机构地区：[1]东北林业大学/森林植物学生态学教育部重点实验室,黑龙江哈尔滨150040 [2]黑龙江省科学院自然与生态研究所,黑龙江哈尔滨150040 [3]黑龙江省科学院,黑龙江哈尔滨150001

出　　处：《黑龙江农业科学》2017年第9期37-41,共5页Heilongjiang Agricultural Sciences

基　　金：黑龙江省科学院团队提升专项资助项目(2014ST06);黑龙江省科学院预研资助项目(YY20172R03);哈尔滨市科技局应用技术研究与研发资助项目(2014AE4AE053)

摘　　要：橡胶草是非常有前景的天然橡胶植物,由于中国耕地资源有限,为了在盐碱土地上发展橡胶草,采用了单因素试验设计,分别研究了不同土壤pH(6.9、7.2、7.9、8.3)对橡胶草生长和产量的影响。结果表明:pH对橡胶草的冠幅没有显著影响,地上生物量及叶面积指数在pH接近中性时(pH=7.2)最大,而橡胶含量在pH为7.9时最大,地下生物量和橡胶产量在pH为8.3时最大,还原糖含量与pH之间无明显的规律性,总糖含量在土壤pH为7.2时最大,总糖产量各个处理之间并无显著性差异。当pH增大或减小时,根叶比均增大。Taraxacum kok-saghyzis a promising natural rubber plant.The research was conducted for future planting in saline-alkaline soils due to limited farm lands in China.Single-factor experimental design was used to study effects of different soil pH on growth and yield ofTaraxacum kok-saghyz.The results showed that soil pH had no significant impact on crown diameter;above-ground biomass and leaf area index showed the highest when pH was7.2,while rubber content was the highest when pH was7.9;underground biomass and rubber yield showed the highest when pH was8.3;No consistent relationship found between reducing sugar content and pH.Total sugar content was the highest as pH was7.2,while no significant differencesshowed between total sugar content of different treatments.When pH increased or decreased,root/shoot ratio increased.

关 键 词：橡胶草 叶面积指数 总糖 橡胶含量 生物量 根叶比 

分 类 号：S576[农业科学—作物学]