绿色环保肥料增效剂聚天冬氨酸对杨树幼苗生长的影响  

Effect of the Environment-friendly Nutrient Synergist Polyaspartic Acid on the Growth of Poplar Seedlings

作　　者：曹丹 王世震 韩梅 CAO Dan;WANG Shi-Zhen;HAN Mei(College of Biology and the Environment,CoInnovation Center for Sustainable Forestry in Southern China,Nanjing Forestry University,Nanjing 210037)

机构地区：[1]南京林业大学生物与环境学院,南方现代林业协同创新中心,南京210037

出　　处：《植物研究》2021年第5期712-720,共9页Bulletin of Botanical Research

基　　金：国家自然科学基金项目(31700525,31870589);江苏高校优势学科建设工程项目(PAPD)。

摘　　要：聚天冬氨酸(PASP)是一种环境友好型高分子氨基酸聚合物,具有肥料增效剂和缓释剂的作用。本研究通过对水培"南林895杨"幼苗设置不同浓度氮和PASP共12个梯度处理,探讨PASP在木本植物杨树中的增效作用和机制。研究发现,在氮供应不足时,营养液中添加一定的PASP促进了杨树幼苗株高、叶片数、地上部分鲜重和氮的利用效率的增加,降低了杨树幼苗根冠比和硝态氮含量。而在高氮条件下施加PASP效果不显著甚至会加重高氮胁迫,抑制植物生长。这些研究结果表明,PASP可以用作杨树的肥料增效剂,添加适量PASP有望在实际生产中促进低氮条件生长的杨树生物量的增加。Polyaspartic acid(PASP)is an environment-friendly polymeric substance that has been frequentlyused as fertilizer synergist and sustained release agent in agriculture.In order to investigate the effects of PASPon nitrogen uptake and utilization in poplar seedlings,12 gradient treatments of different concentrations ofnitrogen and PASP were set in the hydroponic-grown poplar hybrid’Nanlin 895’seedlings.The results showedthat the addition of PASP in nutrient solution had an obvious promoting effect on poplar growth and developmentwhen nitrogen supply was inadequate,and it improved the plant height,number of leaves and shoot biomassand the utilization efficiency of nitrogen,whereas the root to shoot ratio and nitrate concentration in seedlingswas decreased.However,the exogenous supplement of PASP aggravated the stress of high nitrogen under thecondition of high nitrogen.The results demonstrated that PASP could be used as fertilizer synergist for poplar,and the appropriate addition of PASP under insufficient nitrogen conditions would promote growth performanceof poplar seedlings.

关 键 词：南林895杨 聚天冬氨酸 硝酸还原酶 天冬氨酸转氨酶 氮利用效率 

分 类 号：S792.11[农业科学—林木遗传育种]