| 黄土丘陵区草本群落生物量空间 分布格局及其影响因素 |
| 方昭1,2; 张少康3; 刘海威1,2; 焦峰1,3; 张军4
|
| 2018
|
发表期刊 | 草业学报
|
卷号 | 27期号:2页码:26-35 |
摘要 | 草地是干旱半干旱地区黄土高原植被组成的主体,而草本植物作为草地生态系统的优势群落,在黄土高原恢
复植被和水土保持建设方面存在着不可替代的优势。因此本试验选取黄土丘陵区不同纬度下的草本群落为研究
对象,分析草本群落地上、地下生物量的空间分布特征及其影响因素,同时并验证等速生长关系,以期为黄土丘陵
区恢复植被、改善生态建设方面提供理论指导。结果表明:( 1 )在纬度梯度35.95°~38.36°N 变化范围内,黄土丘
陵区不同植被带草本群落地上生物量变化范围为54.60~204.32g · m
-2 ,平均值156.968g · m -2 ,变异系数为
27.83% ;地下生物量变化范围为78.88~829.64g · m -2 ,平均值469.21g · m -2 ,变异系数为48.87% ;草本群落
地下/地上生物量变化范围为0.93~4.49 ,平均值2.89 ,变异系数为39.18% 。草本群落生物量(地下、地上)大小
顺序均为:森林-草原带 > 草原带 > 森林带 > 草原-荒漠带,且地上、地下生物量随纬度梯度变化规律均呈现出
“先增加后减少”的单峰型变化趋势。( 2 )草本群落地下与地上生物量呈极显著正相关( P <0.01 ),决定系数达到
0.59 ,且符合等速生长关系。( 3 )草本群落地下生物量与年均降水、年均温、土壤有机碳、全氮、全磷含量之间均呈
显著相关。气候因子和土壤理化性质对地下生物量都具有重要影响作用,其影响机理还需进一步结合植物生物学
和生理生态方面的综合研究才能做出准确结论 |
其他摘要 | Grassland is the main vegetation type in arid and semiarid areas of the Loess Plateau.Herbs , as the
dominant community in the grassland ecosystem , have an irreplaceable advantage in the restoration of vegeta
-
tion and in the conservation of soil and water on the Loess Plateau.In this study , we analyzed the spatial distri -
bution characteristics of aboveground and belowground biomass and their influencing factors in herbaceous plantcommunities at different latitudes in the Loess Hilly Region.In addition , isokinetic growth was statistically
an -
alyzed to provide theoretical guidance for the restoration of vegetation and improvement of ecological manage -
ment strategies for the Loess Hilly Region.The results showed that
:(
1 ) in the range of 35.95°to 38.36°N ,
the aboveground biomass of the herbaceous plant community in the Loess Hilly Region ranged from 54.60to
204.32g · m
-2 (
average , 156.968g · m -2 ; coefficient of variation , 27.83% ) .Belowground biomass ranged
from 78.88to 829.64g · m
-2 (
average , 469.21g · m -2 ; coefficient of variation , 48.87% ) .The change in the
belowground / aboveground biomass of the herbaceous plant community was 0.93-4.49 ( average , 2.89 ; coeffi -
cient of variation , 39.18% ) .The communities were ranked , from highest biomass ( belowground+
aboveground ) to lowest , as follows : forest - grassland belt>grassland belt>forest belt>grassland - desert belt.
The aboveground and belowground biomass showed a “ single peak ” trend along the latitudinal gradient , first
increasing and then decreasing
with increasing latitude. (
2 ) There was a significant positive correlation between
belowground biomass and aboveground biomass ( P <0.01 ; coefficient of determination , 0.59 ), and this rela -
tionship was consistent with isokinetic growth.
(
3 ) The belowground biomass of the herbaceous plant commu -
nity was positively
correlated with mean annual precipitation , mean annual temperature , soil organic carbon ,
soil total nitrogen , and soil total phosphorus.Both climatic factors and soil physico - chemical properties had im -
portant effects on belowground biomass.To draw accurate conclusions about the effects of climatic and soil
physico - chemical properties on plant communities ,
further plant biology and eco - physiology
research should be
undertaken to explore the mechanisms underlying plants ’ responses. |
关键词 | 黄土丘陵区
分布格局
草本群落生物量
影响因素
等速生长
|
收录类别 | 中文核心期刊要目总览
|
语种 | 中文
|
文献类型 | 期刊论文
|
条目标识符 | sbir.nwafu.edu.cn/handle/361005/10281
|
专题 | 水保所知识产出(1956---)
|
作者单位 | 1.中国科学院水利部水土保持研究所 2.中国科学院大学 3.西北农林科技大学水土保持研究所 4.华中农业大学公共管理学院
|
第一作者单位 | 中国科学院水利部水土保持研究所
|
推荐引用方式 GB/T 7714 |
方昭,张少康,刘海威,等. 黄土丘陵区草本群落生物量空间 分布格局及其影响因素[J]. 草业学报,2018,27(2):26-35.
|
APA |
方昭,张少康,刘海威,焦峰,&张军.(2018).黄土丘陵区草本群落生物量空间 分布格局及其影响因素.草业学报,27(2),26-35.
|
MLA |
方昭,et al."黄土丘陵区草本群落生物量空间 分布格局及其影响因素".草业学报 27.2(2018):26-35.
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文件名:
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黄土丘陵区草本群落生物量空间分布格局及其影响因素_方昭.pdf
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