| 黄土高原不同植被带油松人工林生态化学计量特征及其影响因素 |
| 董从国1; 乔雨宁1; 曹扬1,2; 陈云明1,2; 吴旭2
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| 2020
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发表期刊 | 西北林学院学报
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卷号 | 35期号:3页码:1-8 |
摘要 | 为阐明油松人工林生态系统化学计量特征空间差异,分析其随气候因素变化的响应机制,
以陕北黄土高原森林带、森林草原带和草原带油松人工林为研究对象,分析叶片、凋落物和土壤 C 、
N 、 P 化学计量特征及其与气候因子的关系。结果表明: 1 )油松叶片、凋落物 C 含量以草原带最高,
但其土壤C含量最低,叶片与土壤 N 含量均表现为森林带 > 森林草原带 > 草原带,叶片 P含量以
森林带最高,但其土壤 P 含量最低。 2 )叶片 C∶N 和 C∶P 以森林带最低,油松人工林生产力水平
随降水梯度的升高而增加;森林草原带叶片 N∶P 为 15.57 ,植被生长受到 N 、 P 元素共同限制,而
森林带和草原带叶片 N∶P 均 <14 ,油松生长受到 N 限制;土壤 C∶P 表现为森林带 > 森林草原带
> 草原带,森林带 P 素释放潜力差。 3 )油松人工林叶片 C 含量随年均降水量增加而降低, N 、 P 含
量情况则相反;年平均降水、气温与土壤 C 、 N 含量间存在极显著正相关关系 ( P <0.01 ),而与土壤
P 含量间表现为显著负相关( P <0.05 ),气候条件变化对油松人工林生长有着明显的影响。 |
其他摘要 | In order to elucidate the differences of stoichiometric characteristics in Pinus tabuliformis planta -
tion in spatial scales , and to clarify their response mechanisms to climatic factors , P . tabuliformis planta -
tions occurring in three typical vegetation zones (
forest zone , forest - grass zone and grass zone ) of the Loess
Plateau in northern Shaanxi Province were taken as the research objects , the stoichiometry of carbon ( C ),
nitrogen ( N ) and phosphorus ( P ) in leaf , litter , soil and their relationship with climatic factors were ana -
lyzed.The results showed that 1 ) P . tabuliformis plantations in grass zone had the highest C content in
leaf and litter , and lowest in soil.The N contents in leaf and soil gradually reduced from forest zone to grass
zone.The leaf P content in forest zone was highest while soil P content was lowest.2 ) The ratios of C∶N
and C∶P in leaf was lowest in forest zone , indicating that the productivity of P . tabuliformis plantation in -
creased as precipitation increased.The leaf N∶P ratio in forest - grass zone was 15.57 , indicating that theindividual growth was limited by N and P.In contrast
,
the leaf N∶P ratios in forest and grass zones were
less than 14 , indicating that the growth of P . tabuliformis was restricted by N.Soil C∶P ranked as forest
zone>forest - grass zone>grass zone , indicating that the P release potential was poor in forest zone.3 ) The
content of C in leaf decreased with the increase of annual precipitation , but the contents of N and P were
opposite.Annual average precipitation , annual average temperature were positively correlated with soil C
and N content ( P <0.01 ) and negatively correlated with soil P ( P <0.05 ) .Climate changes had a signifi -
cant influence on the growth of P . tabuliformis plantations. |
关键词 | 化学计量学
油松人工林
植被带
叶片 - 凋落物 - 土壤连续体
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收录类别 | 中文核心期刊要目总览
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语种 | 中文
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文献类型 | 期刊论文
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条目标识符 | sbir.nwafu.edu.cn/handle/361005/9939
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专题 | 水保所知识产出(1956---)
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作者单位 | 1.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 2.中国科学院 水利部水土保持研究所
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推荐引用方式 GB/T 7714 |
董从国,乔雨宁,曹扬,等. 黄土高原不同植被带油松人工林生态化学计量特征及其影响因素[J]. 西北林学院学报,2020,35(3):1-8.
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APA |
董从国,乔雨宁,曹扬,陈云明,&吴旭.(2020).黄土高原不同植被带油松人工林生态化学计量特征及其影响因素.西北林学院学报,35(3),1-8.
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MLA |
董从国,et al."黄土高原不同植被带油松人工林生态化学计量特征及其影响因素".西北林学院学报 35.3(2020):1-8.
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黄土高原不同植被带油松人工林生态化学计量特征及其影响因素_董从国.pdf
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