欢迎访问《中国农学通报》，
中国农学通报

中国农学通报 ›› 2011, Vol. 27 ›› Issue (16): 1-6.

所属专题： 园艺

• 林学 园艺 园林 •    下一篇

不同磷水平对橡胶树幼苗氮钾吸收、分配与利用的影响

何鹏 吴敏 韦家少 覃怀德 吴炳孙   

  • 收稿日期:2011-04-21 修回日期:2011-05-06 出版日期:2011-07-05 发布日期:2011-07-05
  • 基金资助:

    中国热带农业科学院橡胶研究所基本科研业务费项目;中国热带农业科学院橡胶研究所基本科研业务费项目

Influence of Different Phosphorus Levels on Absorption, Utilization and Partition of N, K on Hevea brasiliensis Seedlings

  • Received:2011-04-21 Revised:2011-05-06 Online:2011-07-05 Published:2011-07-05

PDF (PC)

1008

摘要：

为研究磷素的缺乏对橡胶树氮、钾吸收利用分配特性的影响，利用橡胶树PRIM600号实生无性系幼苗为材料，通过水培试验，研究不同磷水平（P2O5浓度为31、10、5、1、0 mg/L）下橡胶树氮和钾的吸收、利用和分配规律。结果表明，随着磷水平的下降，橡胶树氮、钾的吸收效率均显著降低。茎的氮利用效率随着磷水平的下降而显著升高。根、叶的氮利用效率在10 mg/L、5 mg/L、1 mg/L等轻度磷胁迫下与正常处理无显著差异，但在0 mg/L处理下与正常处理达到差异显著水平。茎的钾利用效率随着磷水平的下降显著提高，但叶、根等器官钾的利用效率无显著变化。同时，低磷胁迫下，橡胶树增加了对根系的氮、钾素分配比例，促进根的生长，从而增强橡胶树的氮、钾的吸收能力。此外，缺磷显著可提高橡胶树的N/P比和K/P比、降低N/K比。说明在缺磷条件下，磷是主要的生长限制因子，且会导致N/K比例失调，产生相对的氮素缺乏。在生产中，缺磷条件下应适当提高氮肥的比例，从而保持氮和钾的相对平衡。

关键词: 蒲公英 绿原酸 提取 分离, 蒲公英 绿原酸 提取 分离

Abstract:

To study the effect of phosphorus (P) deficiency to the nutrition efficiency of nitrogen (N) and potassium (K),the hydroponics culture experiments were carried out with the Clone RRIM600 (Hevea brasiliensis) seedlings under different P levels (P2O5: 0, 1, 5, 10, 31 mg/L). The results indicated that: the absorption efficiency of N and K of Hevea decreased significantly with the decrease of P level. The N utilization efficiency in stem significantly increased with the decrease of P level. The N utilization efficiency in root and leaf under 10 mg/L, 5 mg/L and 1 mg/L P treatments haven’t significantly difference with the normal level (31 mg/L, CK), but which under the 0 mg/L significantly higher than the CK. The K utilization efficiency in stem significantly increased with the decrease of P level, but which in the leaf and root haven’t significantly variety. Meanwhile, under P deficiency, the partition of N and K of the root were significantly increased to increase the growth of root, thus enhancing the absorption of N and K of Hevea. Furthermore, the P deficiency significantly increased the N/P and K/P, decreased the N/K. It indicated that the P not only the main limiting factor under P deficiency, but also lead to the N/K disorder, induced the relative N deficiency.