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应用生态学报 ›› 2000, Vol. ›› Issue (5): 668-670.

• 研究论文 • 上一篇    下一篇

磷胁迫条件下落叶松幼苗对难溶性磷的利用

张彦东1, 白尚斌2, 刘雪峰2, 王政权3   

  1. 1. 中国科学院西双版纳热带植物园, 昆明650223;
    2. 云南省林业科学院, 昆明650204;
    3. 东北林业大学森林资源与环境学院, 哈尔滨150040
  • 收稿日期:1999-11-08 修回日期:2000-05-11 出版日期:2000-09-25
  • 通讯作者: 张彦东,男,1963年4月生,博士,副研究员,主要研究领域为森林培育与林地营养管理,发表论文30余篇.E-mail:zhyd@public.km.yn.cn
  • 基金资助:
    教育部优秀年轻教师基金资助项目

Utilization of insoluble phosphate by Larix gmelini seedlings under phosphorus starvation

ZHANG Y1, ong2, BAI Shangbin2, LIU Xuefeng3   

  1. 1. Xishuangbanna Tropical Botanic Garden, Chinese Academy of Sciences, Kunming 650223;
    2. Yunnan Academy of Forestry Sciences, Kunming 650204;
    3. School of Forest Resources and Environment, Nort heast Forestry University, Harbin 150040
  • Received:1999-11-08 Revised:2000-05-11 Online:2000-09-25

摘要: 以AlPO4为P源在温室内采用砂培的方法,研究了落叶松(Larix gmelini)2年生幼苗对难溶性P酸盐的利用状况.结果表明,落叶松幼苗可以利用一定数量的AlPO4.在供AlPO4不接种菌根菌时,落叶松幼苗吸收的P可达正常供P时的35.1%和64.9%.不同菌种对落叶松幼苗利用AlPO4的影响不同.接种点柄乳牛肝菌(Suillus granulatus)时,落叶松幼苗对AlPO4的利用量高于不接种的,此时落叶松幼苗吸P量的20%和35%是来自于菌根的贡献.接种厚环乳牛肝菌(Suillus grevillei)时,落叶松幼苗对AlPO4的利用量与不接种的相近.在P胁迫条件下,落叶松幼苗的根/冠比加大,落叶松以加大根生长的方式来增加P的吸收.

Abstract: The utilization of insoluble phosphate by 2 years old larch(Larix gmelini) seedlings was studied in greenhouse.The seedlings were grown in sand and AlPO4 was supplied as a source of P.The results showed that larch seedlings could utilize some amount of AlPO4. Supplied with AlPO4 but not incubated with mycorrhizal fungi,the seedlings could absorb 35.1% and 64.9% of the phosphorus uptake when supplied with soluble phosphate.The effects of various mycorrhizal fungi on utilization of phosphate were different,i.e.,the utilization rate of AlPO4 was higher when incubated with Suillus granulatus,but was similar to control when incubated with Suillus grevillei. The proportion of root/crown became higher under P starvation,and larch seedlings could gain more P by enlarging their root growth.