不同浓度磷肥处理对橡胶树幼苗根系生长影响初步研究  

Effects of Different Concentrations of Phosphate Fertilizer Treatments on Root Growth of the Rubber Tree Seedlings

作　　者：刘俊良[1] 魏孔亮 冯俊 符学知 张琪昕 LIU Junliang;WEI Kongliang;FENG Jun;FU Xuezhi;ZHANG Qixin(Hainan State Farms Academy of Science,Haikou 570311,Hainan)

机构地区：[1]海南省农垦科学院,海南海口570311

出　　处：《中国热带农业》2020年第3期65-69,共5页China Tropical Agriculture

基　　金：国家重点研发计划项目子课题“橡胶化肥减施增效技术集成研究与示范”(课题任务书编号:2018YFD0201105-05)。

摘　　要：采用容器分区法研究不同浓度磷肥处理对同株橡胶树幼苗根系生长的影响,结果发现:在磷肥浓度为250mg·kg^-1的处理下,橡胶树幼苗根系鲜重、根体积,极显著地高于其他各个处理,根表面积亦高出对照12.8cm^2,增幅为23.7%,促进作用明显;高磷浓度(1250mg·kg^-1)下,橡胶树根系烘干重低于对照30%,差异达显著,而根系体积仅为对照的75%,表现出一定的抑制作用;低磷浓度(50mg·kg^-1)下,各指标与对照没有达到显著差异。The influence of phosphate fertilizer treatments of different concentrations on the root growth of the same rubber tree seedlings were studied by using container partition methods.The results indicated that under the treatment of phosphate fertilizer with the concentration of 250 mg·kg^-1,the root raw weight and root volume of the rubber tree seedlings had significantly higher than other treatments.The root surface area was also 12.8 cm^2 higher than that of the control,with an increase rate of 23.7%,and it showed the promoting effect was evident.Under the treatment of phosphate fertilizer with a high concentration of 1250 mg·kg^-1,the dry weight of rubber tree root was 30%lower than that of the control significantly.While the root volume was only 75%of the control,indicating a certain inhibiting effect.Under the treatment of phosphate fertilizer with a low concentration of 50 mg·kg^-1,there were no significant differencs between each indexes and the control.

关 键 词：磷肥 橡胶树幼苗 根系生长 影响研究 

分 类 号：S794.1[农业科学—林木遗传育种]