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| 磷胁迫条件下落叶松幼苗对难溶性磷的利用 | |
| 引用本文： | 张彦东,白尚斌,刘雪峰,王政权.磷胁迫条件下落叶松幼苗对难溶性磷的利用[J].应用生态学报,2000,11(5):668-670. |
| 作者姓名： | 张彦东 白尚斌 刘雪峰 王政权 |
| 作者单位： | 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 |
| 基金项目： | 教育部优秀年轻教师基金资助项目 |
| 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 |
| 关 键 词： | 落叶松 磷胁迫 菌根 难溶磷 根际 活化利用 |
Utilization of insoluble phosphate by Larix gmelini seedlings under phosphorus starvation |
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| ZHANG Yandong,BAI Shangbin,LIU Xuefeng,WANG Zhengquan.Utilization of insoluble phosphate by Larix gmelini seedlings under phosphorus starvation[J].Chinese Journal of Applied Ecology,2000,11(5):668-670. | |
| Authors: | ZHANG Yandong BAI Shangbin LIU Xuefeng WANG Zhengquan |
| Institution: | Xishuangbanna Tropical Botanic Garden, Chinese Academy of Sciences, Kunming 650223. zhyd@public.km.yn.cn |
| 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 AlPO\-4 was supplied as a source of P.The results showed that larch seedlings could utilize some amount of AlPO\-4. Supplied with AlPO\-4 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 AlPO\-4 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. |
| Keywords: | Larix gmelini Phosphorus starvation Mycorrhizal Fungi Insoluble phosphate Rhizosphere |
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