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黄土丘陵区草本植物叶片与枯落物 生态化学计量学特征
刘洋1; 曾全超1; 安韶山2; 李鑫1; 黄懿梅1
2017
Source Publication应用生态学报
Volume28Issue:6Pages:1793-1800
Abstract

以黄土高原延河流域森林、森林草原和草原3 个植被区的4 种典型草本植物达乌里
胡枝子、长芒草、铁杆蒿、茭蒿的叶片和枯落物为对象,测定叶片和枯落物中碳( C) 、氮( N) 、磷
( P) 、钾( K) 含量及其比值,分析草本植物在该区域的养分限制及再吸收规律.结果表明: 4 种
植物叶片N/P 均小于14,生长主要受氮元素含量限制; 除达乌里胡枝子外,其他3 种植物N、
P、K 的养分再吸收效率平均值分别为48.7%、32.5%、79.9%.茭蒿和铁杆蒿较高的N、P、K 养
分再吸收效率和叶片K 含量有助于其在水分竞争中占据优势.铁杆蒿枯落物的C /N 显著低于
长芒草和茭蒿的枯落物,因而更易分解和进行养分循环.这可能是铁杆蒿在3 个植被区分布广
泛的原因之一.

Other Abstract

This study was conducted in the forest,forest-steppe and steppe vegetation zones along
the Yanhe River Basin,where the leaf and litter samples from four dominant herbaceous plants including
Lespedeza davurica,Stipa bungeana,Artemisia sacrorum,Artemisia giraldii were taken. By
measuring the concentrations of carbon ( C) ,nitrogen ( N) ,phosphorus ( P) and potassium ( K) ,
we measured the concentrations and their ratios to explore the limit and resorption of nutrient in the
herbaceous plants. The results showed that the leaf N/P of four herbaceous plants was all lower than
14,suggesting their growth was mainly limited by N content. Except for L. davurica,the mean nutrient
resorption efficiency of K,N and P in the other three plants was 79.9%,48.7% and 32.5%,
respectively. The higher nutrient resorption efficiency and K concentration in the leaf were beneficial
for soil water competition of A. sacrorum and A. giraldii. The litter C /N in A. sacrorum was significantly
lower than that in S. bungeana and A. giraldii,which was easy to decompose to benefit the
nutrient recycling. This resulted in the wide distribution of A. sacrorum in the three vegetation areas.

Keyword草本植物 叶片 枯落物 养分再吸收效率 植被恢复
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/361005/8420
Collection水保所知识产出(1956---)
Affiliation1.西北农林科技大学资源环境学院农业部西北植物营养与农业环境重点实验室
2.西北农林科技大学水 土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室
Recommended Citation
GB/T 7714
刘洋,曾全超,安韶山,等. 黄土丘陵区草本植物叶片与枯落物 生态化学计量学特征[J]. 应用生态学报,2017,28(6):1793-1800.
APA 刘洋,曾全超,安韶山,李鑫,&黄懿梅.(2017).黄土丘陵区草本植物叶片与枯落物 生态化学计量学特征.应用生态学报,28(6),1793-1800.
MLA 刘洋,et al."黄土丘陵区草本植物叶片与枯落物 生态化学计量学特征".应用生态学报 28.6(2017):1793-1800.
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