| 放牧强度对黄土丘陵区生物结皮土壤化学计量学 特征的影响 |
| 李雯1; 马昕昕2; 马宁3; 赵允格2; 乔羽1
|
| 2021
|
发表期刊 | 草地学报
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卷号 | 29期号:11页码:2547-2555 |
摘要 | 研究以位于黄土丘陵区的固原、定边、神木、安塞为研究区域,以各区20年以上封禁草地( G0 )为对照,分析了
不同放牧强度(以羊粪球密度计: G1 , 0~10 个· m -2 ; G2 ,
10~20 个· m -2 ; G3 , >20 个· m -2 )下生物结皮层及
0~2cm 土层土壤有机碳( SOC )、全氮(
TN )、全磷( TP )含量及生态化学计量学特征。结果表明:放牧仅降低安塞
藓结皮盖度,对各地区的藻结皮盖度和生物量均无影响;从各区域来看,除神木生物结皮层和 0~2cm 土层 SOC 、
TN 、 N∶P 、 C∶P 在 G3 下降低以外,其余地区各放牧强度下 SOC 、 TN 、 TP 含量及 C∶N 、 N∶P 、 C∶P 无降低现象;
总体来看,各强度放牧对生物结皮层SOC 、 TN 、 TP含量及 C∶N 、 N∶P 、 C∶P无影响,对0~2cm 土层SOC 、 TN 、
TP 含量及 C∶N 无影响,而 N∶P 、 C∶P 在 G3 降低。综上,放牧强度小于 G3 时,黄土丘陵区退耕草地生物结皮土
壤养分及生态化学计量学特征无降低现象。 |
其他摘要 | Guyuan , Dingbian , Shenmu and Ansai were selected as the study areas in the hilly Loess Plateau
region.The closed rehabilitated grasslands ( G0 ) that over 20years old was set as the control , the effects of
grazing in different intensity
on soil organic carbon ( SOC ), total nitrogen ( TN ), total phosphorus ( TP )
contents and ecological stoichiometry characteristics of biocrusts at 0~2cm layer soil were investigated in
the rehabilitated grasslands of the hilly Loess Plateau region.Three grazing
intensity , G1 : 0~10goat
dung · m
-2 ,
G2 : 10~20goat dung · m -2 and G3 : >20goat dung · m -2 , were included in the study.The
results showed that the coverage of moss crusts decreased against the increase of grazing intensity in Ansai.
In addition , grazing intensity did not exert significant effects on the coverage and biomass of cyanobacterial
and moss crusts in the three other study areas.SOC , TN , N∶P and C∶P decreased under the intensity
of
G3in Shenmu.Moreover , SOC , TN , TP , C∶N , N∶P and C∶P did not show an obvious decrease under
different grazing intensities in the three other areas.In general
,
grazing did not significantly
affect the con -
tents of SOC , TN , TP , C∶N , N∶P and C∶P at the biocrustal layer in the hilly Loess Plateau region , and
did not significantly affect the contents of SOC ,
TN , TP and C∶N at 0~2cm soil layer , but in comparison
with no grazing , N∶P and C∶P were decreased at G3.In conclusion ,
when the grazing intensity
was lower
than G3 , the soil nutrient and ecological stoichiometry characteristics of biological soil crusts were not re -
duced in the rehabilitated grassland of the hilly loess region. |
关键词 | 生物结皮
放牧强度
化学计量
碳、氮、磷
养分限制
|
收录类别 | 中文核心期刊要目总览
|
语种 | 中文
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文献类型 | 期刊论文
|
条目标识符 | sbir.nwafu.edu.cn/handle/361005/10377
|
专题 | 水保所知识产出(1956---)
|
作者单位 | 1.西北农林科技大学资源环境学院 2.中国科学院水利部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 3.西北农林科技大学林学院
|
推荐引用方式 GB/T 7714 |
李雯,马昕昕,马宁,等. 放牧强度对黄土丘陵区生物结皮土壤化学计量学 特征的影响[J]. 草地学报,2021,29(11):2547-2555.
|
APA |
李雯,马昕昕,马宁,赵允格,&乔羽.(2021).放牧强度对黄土丘陵区生物结皮土壤化学计量学 特征的影响.草地学报,29(11),2547-2555.
|
MLA |
李雯,et al."放牧强度对黄土丘陵区生物结皮土壤化学计量学 特征的影响".草地学报 29.11(2021):2547-2555.
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文件名:
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放牧强度对黄土丘陵区生物结皮土壤化学计量学特征的影响_李雯.pdf
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