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云雾山草地植物地上部分和枯落物的碳、氮、 磷生态化学计量特征
马任甜1; 方 瑛1; 安韶山1,2
2016
Source Publication土 壤 学 报
Volume53Issue:5Pages:1171-1180
Abstract

碳(C)、氮(N )、磷(P)生态化学计量比是生态系统过程和功能的重要特征。为
探究云雾山天然草地30年恢复演替过程中不同封育年限植物和枯落物的全碳、全氮和全磷含量及其生
态化学计量特征变化规律,以云雾山封育1、12、20、30 年的天然草地为研究对象,通过典型样方调
査研究了黄土高原不同封育年限植物和枯落物养分变异特征。结果表明:不同封育年限间,植物地上
部分C∶N 、C∶P、N ∶P比变化范围分别为24.91~37.37、380.1~562.1、12.14~15.86,均值分别为
32.51、473.6和14.64;枯落物C∶N 、C∶P、N ∶P比变化范围分别为37.18~47.11、755.5~885.9、
16.41~22.31,均值分别为40.71、819.9、20.30。植物地上部分C 、N 、P含量间呈极显著相关
(p<0.01);植物地上部分P含量与C∶N 、C∶P、N ∶P呈极显著负相关(p<0.01),与枯落物C、
P、C∶P、N ∶P呈极显著相关(p<0.01)。云雾山植物N ∶P比介于14~16之间,植物生长受氮磷共
同限制,建议增加草地氮、磷肥的使用量。该研究结果有助于进一步了解云雾山草地C、N 、P在不同
组分间的相互作用规律与机制。

Other Abstract

Balance between various elem ents in the ecosystem has been a focus or a
hotspot of the researches on ecology and biogeochem ical cycles under global change. Ecological stoichiom etry
is a science that com bines som e basic principles of biology,physics and chem istry,explores for balance of
energy and balance of various chem ical elem ents in biological system s and provides an integrated approach to
investigating rules of the behaviors of various elem ents in biogeochem ical cycling and ecological processes and
their stoichiom etric relationships. Ecological stoichiom etric ratios of C,N and P are im portant characteristics
of the process and function of an ecological system . 【M ethod】In order to explore variation rules of the
contents of organic carbon,nitrogen and phosphorus in shoots and litter of plants and C∶N ∶P stoichiom etry
characteristics during various enclosure phases of the 30 years of restoration and succession process of natural
grasslands in the Y unwu M ountain,typical quadrats of grassland that had been enclosed for restoration
for 1,12,20 and 30 years were set up for analysis of nutrient contents in shoots and litter of the plants in
the grasslands and their relationships with enclosure age in the Loess Plateau. 【R esult】R esults showed
that carbon,nitrogen and phosphorus contents in shoots and little of the plants and their stoichiom etry  varied sharply with enclosure age. Carbon,nitrogen and phosphorus content varied in the range of 388.1~
437.6 m g g -1 ,12.13~15.42 m g g -1 and 0.78~1.06 m g g -1 ,being 418.0 m g g -1 ,13.16 m g g -1 and
0.92 m g g -1 ,on average,respectively in shoots of the plants;and in the range of 402.7~427.2 m g g -1 ,
8.58~11.04 m g g -1 and 0.49~0.56 m g g -1 ,being 411.3 m g g -1 ,10.34 m g g -1 and 0.53 m g g -1 on average,
respectively;and C ∶N ,C ∶P and N ∶P ratio in the range of 24.91~37.37,380.1~562.1 and
12.14~15.86,being 32.51,473.6 and 14.64,respectively,in shoots of the plants,and in the range of
37.18~47.11,755.5~885.9 and 16.41~22.31,being 40.71,819.9 and 20.30,respectively in litter of the
plants. In term s of average of the content of nitrogen and phosphorus shoots of the plants was higher than litter
of the plants,while in term s of average of the C∶N ,C∶P and N ∶P ratio a reverse trend was found. It is
known that N :P ratio is an im portant factor that controls litter decom position and nutrient cycling. Litter,
low in P concentration was often high in N and lignin content(or in N :P ratio)and decom posed slowly,
while litter low in N ∶P ratio decom posed easily. A s litter of the plants in the grassland of the Y unwu M ountain
was low in N ∶P ratio,it decom posed relatively fast,and kept little nutrients in storage. C,N and P contents
in shoots of the plants were extrem ely significantly correlated with each other(p<0.01);P content in
shoots of the plants was in extrem ely significant negative relationships with the C∶N ,C∶P and N ∶P ratio
(p<0.01),while C and P contents and C∶P and N ∶P ratios in litter were extrem ely significantly related
to P content in shoots of the plants. N ∶P ratio in the plants of Y unwu M ountain varied between 14 to 16. A s
plant growth was affected jointly by N and P,it is recom m ended that application of N and P fertilizers be
increased in rate so as to prevent degradation,rationalize exploitation and m aintain sustainable developm ent
of the grasslands. 【Conclusion】This com prehensive research shows that enclosure can increase vegetation
coverage,biom ass of the plants,and plant productivity of the grassland and the m easure in this area can
m ake the grassland vegetation ecosystem present a trend of com prehensive recovery. The findings of this study
help further understand rules and m echanism s of the interactions of carbon,nitrogen and phosphorus on
different com ponents of the grasslands in the Y unwu M ountain.

Keyword生态化学计量学 植物地上部分 枯落物 草地 封育年限
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8675
Collection水保所知识产出(1956---)
Affiliation1.西北农林科技大学资源环境学院,陕西杨凌 712100
2.西北农林科技大学黄土高原土壤侵蚀与旱地农业国家重点实验室,陕西杨凌 712100
Recommended Citation
GB/T 7714
马任甜,方 瑛,安韶山. 云雾山草地植物地上部分和枯落物的碳、氮、 磷生态化学计量特征[J]. 土 壤 学 报,2016,53(5):1171-1180.
APA 马任甜,方 瑛,&安韶山.(2016).云雾山草地植物地上部分和枯落物的碳、氮、 磷生态化学计量特征.土 壤 学 报,53(5),1171-1180.
MLA 马任甜,et al."云雾山草地植物地上部分和枯落物的碳、氮、 磷生态化学计量特征".土 壤 学 报 53.5(2016):1171-1180.
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