摘要
用CO(NH_2)_2和Na_2SO_4模拟氮-硫沉降,采用二因素三水平法对氮-硫单一及复合沉降6个月后尾巨桉(Eucalyptus urophylla S.T.Blake×E.grandis Hill ex Maiden)和杉木〔Cunninghamia lanceolata(Lamb.)Hook.〕幼苗根、茎、叶片和全株中的全氮和全磷含量及叶片N∶P比的变化进行比较;在此基础上,分析了各器官间以及各器官与全株间全氮和全磷含量的相关性。对尾巨桉的研究结果表明:低和高水平(50和100 kg·hm^(-2)·a^(-1))单一氮沉降条件下各器官和全株的全氮含量均显著高于对照、叶片N∶P比也高于对照,而各器官和全株的全磷含量总体上与对照无显著差异;在低和高水平(15和30 kg·hm^(-2)·a^(-1))单一硫沉降及氮-硫复合沉降条件下,各器官和全株的全氮含量、全株的全磷含量及叶片的N∶P比大多显著高于对照,而各器官的全磷含量则与对照无显著差异。对杉木的研究结果表明:低和高水平单一氮沉降条件下茎、叶和全株的全氮含量均显著高于对照、根的全氮含量则低于对照,各器官和全株的全磷含量及叶片的N∶P比与对照无显著差异;低和高水平单一硫沉降条件下根、叶片和全株的全氮含量及叶片的N∶P比大多显著高于对照,而茎的全氮含量和全株的全磷含量则显著低于对照,各器官的全磷含量与对照无显著差异;氮-硫复合沉降条件下各器官和全株的全氮含量及叶片的N∶P比大多显著高于对照,而各器官和全株的全磷含量则与对照无显著差异。从全株的全氮和全磷含量以及叶片N∶P比的变幅看,2个树种全株的全氮含量对氮-硫复合沉降的响应最强。此外,氮-硫沉降条件下2个树种各器官间的全氮和全磷含量总体无显著相关性,仅尾巨桉根与叶片的全磷含量呈显著正相关;而尾巨桉各器官与全株的全氮和全磷含量呈显著或极显著正相关,杉木叶片与全株的全氮和全磷含量及其茎与全株的全磷含量�
Simulated nitrogen-sulfur depositions by CO（NH2）2 and Na2SO4, changes in total nitrogen and total phosphorus contents in root, stem, leaf and whole plant and N ： P ratio in leaf of Eucalyptus urophylla S. T. Blake x E. grandis Hill ex Maiden and Cunninghamia lanceolata （Lamb.） Hook. seedlings after nitrogen-sulfur single and complex deposited for six months were compared by two factorsthree levels method. On this basis, the correlations in total nitrogen and total phosphorus contents among organs and between organs and whole plant were analyzed. The research results on E. urophylla ：E. grandis show that under single nitrogen deposition condition with low and high levels （50 and 100 kg·hm-2·a-1 ） , total nitrogen content in organs and whole plant is significantly higher than that of the control, N ： P ratio in leaf is also higher than that of the control, while total phosphorus content in organs and whole plant is not generally significantly different to that of the control. Under conditions of single sulfur deposition with low and high levels （15 and 30 kg ~ hm-2 ~ a-1） and nitrogen-sulfur complex deposition, total nitrogen content in organs and whole plant, total phosphorus content in whole plant and N ： P ratio in leaf are mostly significantly higher than those of the control, while total phosphorus content in organs is not significantly different to that of the control. The research results on C. lanceolata show that under single nitrogen deposition condition with low and high levels, total nitrogen content in stem, leaf and whole plant is significantly higher than that of the control, that in root is lower than that of the control, total phosphorus content in organs and whole plant and N ： P ratio in leaf are not significantly different to those of the control. Under single sulfur deposition condition with low and high levels, total nitrogen content in root, leaf and whole plant and N ： P ratio in leaf are mostly significantly higher than those of the control, while total nitroge
出处
《植物资源与环境学报》
CAS
CSCD
北大核心
2015年第4期28-37,共10页
Journal of Plant Resources and Environment
基金
高等学校博士学科点专项科研基金(20123515110011)
福建省科学技术厅重大专项项目(2012NZ01)
关键词
氮-硫沉降
尾巨桉
杉木
氮含量
磷含量
相关性分析
nitrogen-sulfur deposition
Eucalyptus urophylla S. T. Blake x E. grandis Hill ex Maiden
Curminghamia lanceolata （Lamb.） Hook.
nitrogen content
phosphorus content
correlation analysis
