植物营养与肥料学报2014,20(1)：118-128 Joumal of Plant Nutrition and Fertilizer
doi: 10. 11674/zwyf. 2014. 0113
氮、磷肥对杉木幼苗生物量及养分分配的影响
于钦民"，徐福利",2·，王渭玲3
（1西北农林科技大学资源环境学院，陕西杨凌712100；2中国科学院，水利部水土保持研究所，陕西杨凌712100；
3西北农林科技大学生命科学学院，陕西杨凌712100）
摘要：采用盆栽试验，研究了不同氮、磷肥对杉木（Cunninghamialanceolata）幼苗生物量及养分分配的影响。结果表明，供磷可促进杉木幼苗植株和各器官生物量的增加，并影响叶、茎、根生物量的分配比例，氮、磷处理幼苗叶生物量占全株生物量的45%以上，施氮反而降低杉木叶、茎、根的生物量；施氮显著增加根和叶的氮含量，而显著降低根和叶的磷含量，对基的氮、磷含量没有明显影响；施磷显著降低叶、茎、根的氮含量，叶、茎、根的磷含量随供磷水平的增加而逐渐增加。氮磷配施显著影响叶、茎、根的氮、磷含量和氮、磷累积量。叶片是主要的氮、磷养分存储器官。氮（或磷）水平的增加可降低杉木幼苗的磷（或氮)利用效率，提高氮（或磷）的利用效率；氮、磷肥显著影响杉木幼苗叶、基、根的N/P比。研究结果说明，氮、磷肥增加了杉木幼苗各器官生物量和氮、磷含量，影响了幼苗的养分分配和营养平衡。
关键词：杉木；氮、磷肥：生物量：养分分配；N/P比
中图分类号：S791.27.01；S725.5
文献标识码：A
文章编号：1008505X(2014)010118-11
Effectofnitrogenandphosphorusfertilizationonbiomassand nutrient distribution of Cunninghamia lanceolata seedlings
YU Qin-min', XU Fu-li. ·, WANC Wei-ling”
(ICllge ofResoures and Emionment，Norhest A&FUniersityYanglingShaanxi 200,China; 2 Institute of Soil and Water Conseration of Chinese Academy of Sciences, Ministry of Water Resources, Yangling Shaanxi 712100, China; 3 College of Life Sciences, Northsest A&F Unitersity, Yangling Shaanxi 712100, Chine)
Abstract: A pot experiment method was used to study the effects of different nitrogen and phosphorus fertilization on biomass and nutrient distribution of Cunninghamia lanceolata seedlings. The results show that the high phosphorus fertilization increases the biomass amounts of total plant and individual parts, and the plant biomass allocation ratios among leaves, stems and roots are also affected by different phosphorus fertilization. For treatment supplied with nitrogen and phosphorus, the biomass of leaves accounts for more than 45% of total plant biomass. Instead, applying nitrogenous fertilizer reduces the biomass amounts of leaves, stems and roots in Cunninghamia lanceolata. The application of nitrogen significantly increases N concentrations of roots and leaves, and remarkably decreases P concentrations of roots and leaves,but has no significant effect on nitrogen and phosphorus concentrations of stems. The application of phosphate fertilizer significantly decreases N concentrations of leaves, stems and roots. P concentrations of leaves, stems and roots are increased with the incerease of phosphorus fertilization supply. Nitrogen mixed with phosphorus fertilization can significantly affect N and P concentrations, and N and P accumulations of leaves, stems and roots. Leaves are the main tissue for nitrogen and phosphorus accumulation in the plant. High nitrogen or phosphorus levels on Cunninghamia lanceolata decrease P or N nutrient
收稿日期：2013-05-10
接收日期：20130926
基金项目：国家重点基础研究发展计划"973计划"（2012CB416902)资助。
作者简介：于钦民（1986一），男，广西栖州人，硕土研究生，主要从事养分管理方面的研究。E-mail；minqinyu@163.com
*通信作者E-mail；xf-163@163，com
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