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黄土丘陵区退耕时间序列梯度上草本植被群落与土壤 C、N、P、K 化学计量学特征
张海东1; 汝海丽3; 焦峰1,2,3; 薛超玉1; 郭美丽3
2016
Source Publication环境科学
Volume37Issue:3Pages:1128-1138
Abstract

研究草本植被群落生态化学计量学特征、营养元素分配及其变化规律对阐明草本植被群落对环境变化的响应和适应
性具有重要意义. 本文以延河流域8 个不同退耕年限的草本植被群落叶片、根系及土壤为对象,分别对其C、N、P、K 化学计
量学特征进行了研究. 结果表明,黄土丘陵区草本植被群落叶片C、N、P、K 含量平均值分别为444. 21、22. 34、1. 49、14. 66
mg·g - 1 ,C/N、C/P、C/K、N/P 平均值分别为21. 86、424. 72、39. 82、20. 27; 根系C、N、P、K 含量平均值分别为285. 16、
5. 79、0. 27、6. 07 mg·g - 1 ,C/N、C/P、C/K、N/P 平均值分别为60. 56、1 019. 33、46. 55、21. 36; 土壤C、N、P、K 含量平均值
分别为2. 28、0. 18、0. 28、4. 33 mg·g - 1 ,C/N、C/P、C/K、N/P 平均值分别为16. 43、8. 40、0. 54、0. 66. 在退耕1 ~ 35 年间,
草本植被群落叶片C 含量上升,N 含量先上升后下降,磷含量整体下降,K 含量先下降后上升; 叶片C/N、C/P、C/K、N/P 总
体呈上升趋势. 根系C、N、P、K 含量及其特征的变化规律与叶片不尽相同. 随着退耕年限的增加,土壤C、N 含量上升,P 含
量呈反正弦函数状变化,K 含量呈抛物线状变化,C/N 下降,C/P、C/K、N/P 均上升. 在退耕时间序列梯度上,C、P、K 在叶片
和根系中含量的比值存在不同程度的下降趋势,C、N、P 在叶片和土壤中含量的比值下降,C、N 在根系和土壤中含量的比值
下降. 植物营养元素的限制状况及分配规律均与退耕恢复时间响应关系及程度均存在差异.

Other Abstract

The research of plant ecological stoichiometry characteristics,nutrients distribution and their changes is of great significance
to explain the response and adaptation of plants to environmental change. Leaves,root and soil from eight different abandoned years in
Yanhe River basin were selected to study the content,characteristic ratio and distribution of carbon( C) ,nitrogen ( N) ,phosphorus
( P) ,potassium ( K) . The results showed that the C,N,P,K contents of plant leaves were 444. 21,22. 34,1. 49,14. 66 mg·g - 1
respectively,the C/N,C/P,C/K,N/P ratios of plant leaves were 21. 86,424. 72,39. 82,20. 27 respectively; the C,N,P,K
contents of root were 285. 16,5. 79,0. 27,6. 07 mg·g - 1 respectively,the C/N,C/P,C/K,N/P ratios of root were 60. 56,
1 019. 33,46. 55,21. 36 respectively; the C,N,P,K contents of soil were 2. 28,0. 18,0. 28,4. 33 mg·g - 1 respectively,the C/N,
C/P,C/K,N/P ratios of soil were 16. 43,8. 40,0. 54,0. 66 respectively. During the abandoned year of 1-35,C content of leaves
increased,N content increased and then declined,P content declined overall,K content declined and then increased. The C/N,C/P,
C/K,N/P ratios of plant leaves showed a rising trend overall. The changing pattern of root was different from that of leaves. Along with
the increasing rehabilitation age,C and N contents of soil increased,P content changed as arc-sin function,K content changed as
parabola,C/N decreased,C/P,C/K,N/P increased. With the increase of Abandoned Years,the ratio of C,P,K contents in leaves
and root decreased,the ratio of C,N,P contents in leaves and soil decreased,the ratio of C,N contents in root and soil decreased.
Corresponding relationship and its intension between different abandoned years and plant nutrient limit status and its allocation pattern
were different.

Keyword退耕时间 叶片 根系 土壤 化学计量
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/361005/8600
Collection水保所知识产出(1956---)
Affiliation1.西北农林科技大学资源环境学院
2.西北农林科技大学水土保持研究所
3.中国科学院水 利部水土保持研究所
Recommended Citation
GB/T 7714
张海东,汝海丽,焦峰,等. 黄土丘陵区退耕时间序列梯度上草本植被群落与土壤 C、N、P、K 化学计量学特征[J]. 环境科学,2016,37(3):1128-1138.
APA 张海东,汝海丽,焦峰,薛超玉,&郭美丽.(2016).黄土丘陵区退耕时间序列梯度上草本植被群落与土壤 C、N、P、K 化学计量学特征.环境科学,37(3),1128-1138.
MLA 张海东,et al."黄土丘陵区退耕时间序列梯度上草本植被群落与土壤 C、N、P、K 化学计量学特征".环境科学 37.3(2016):1128-1138.
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