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陇东耕地净第一性生产力及生态服务价值的时空分异研究

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原文链接
  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
  • 维普
为促进甘肃陇东耕地生态系统和经济持续健康发展,该研究采用生产力和生态服务价值的估算方法,对研究区域耕地净第一性生产力( NPP)和生态服务功能的时空分异进行定量分析.结果表明,1997-2005年陇东黄土高原耕地的NPP和生态服务单位面积价值变化不明显,而总量略有上升.同时,耕地的NPP和生态服务单位面积价值在空间分布上有显著的区域差异性,该区域可分成NPP和生态服务价值相对较低的西北区和相对较高的东南区.在西北区,耕地生态服务单位面积价值为7.7万元/(hm2·a),NPP只有3.54 t/(hm2·a)；在东南区,生态服务单位面积价值为10.2万元/(hm2·a),NPP为5.94 t/(hm2·a).因此,要通过合理调整种植结构和作物布局,充分利用降水资源,以提高研究区耕地的NPP和生态服务价值.
Spatial-temporal distribution of the ecological service value and NPP of cultivated land on Longdong Loess Plateau
The heterogeneity in spatial-temporal scale of the net primary productivity (NPP) and ecological service value was studied to keep a healthy ecological system of cultivated land by using methods related to the ecological system service and productivity assessment. The changes in NPP and the unit area value of ecological service were not distinct with the total increasing from 1997 - 2005. The spatial distribution of NPP and ecological service value was very obvious and divided into the lower value in the northwest area and the higher value in the southeast area. The unit area value of ecological service was about 10. 2 × 104 yuan/(ha · A) and NPP was a-bout 5. 04 t/(ha · A) in the southeast area, while in the northwest area, they were 7. 7×104 yuan/(ha · A) and 3. 54 t/(ha · A) respectively. The NPP and ecological service value would be improved by using precipitation resources with rational and high efficiency under the conditions of optimal crop layout and adjusted plant structure.

Longdongcultivated landNPPecological service valuespatial-temporal distribution

李广、黄高宝、王琦、王兴堂、高珍妮、刘成忠

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甘肃省干旱生境作物学重点实验室 甘肃农业大学,甘肃兰州730070

甘肃农业大学信息科学技术学院,甘肃兰州730070

甘肃农业大学农学院,甘肃兰州730070

甘肃农业大学草业学院,甘肃兰州730070

中科院寒区旱区环境与工程研究所青藏高原冰冻圈观测研究站,甘肃兰州730000

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陇东 耕地 NPP 生态服务价值 时空分异

国家自然科学基金国家自然科学基金

3106017840771132

2011

草业学报
中国草原学会 兰州大学草地农业科技学院

草业学报

CSTPCDCSCD北大核心
影响因子：4.082
ISSN：1004-5759
年,卷(期)：2011.20(6)
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