| 1998—2018年北疆天然草地植被覆盖度时空变化及其与气象因子的关系 |
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| 引用本文： | 侯志雄,井长青,王公鑫,郭文章,赵苇康.1998—2018年北疆天然草地植被覆盖度时空变化及其与气象因子的关系[J].中国农业科技导报,2023,25(2):140-151. |
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| 作者姓名： | 侯志雄 井长青 王公鑫 郭文章 赵苇康 |
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| 作者单位： | 1.新疆农业大学资源与环境学院, 新疆草地修复与环境信息重点实验室, 乌鲁木齐 830052;2.新疆农业大学草业学院, 乌鲁木齐 830052 |
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| 基金项目： | 国家自然科学基金项目(42161024);新疆维吾尔自治区重点实验室开放课题项目(2020D04037) |
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| 摘 要： | 为分析北疆天然草地植被覆盖度在生长季不同月份的时空变化及其与气象因子的关系，采用像元二分模型、变化率分析和相关分析探讨了北疆1998—2018年6—9月天然草地植被覆盖度的时空变化及其与气象因子的关系。结果表明，北疆天然草地植被覆盖度空间上呈现降水较少、气温较高的中部和东部较低，海拔较高、降水较多且相对湿度较高的北部、西部和南部较高，由中部和东部向北部、西部和南部三面波动增加。北疆天然草地植被覆盖度在6、7、8和9月呈降低趋势，月平均值表现为6月>7月>9月>8月。北疆天然草地归一化植被指数7月为增加趋势，6、8和9月为减少趋势，整体上波动较小。6、7和8月北疆月平均天然草地植被覆盖度与降水和相对湿度呈正相关关系，9月与气温和日照时数呈正相关关系。
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| 关 键 词： | 草地植被覆盖度 时空变化 气象因子 相关性分析 |
| 收稿时间： | 2021-10-15 |
Temporal and Spatial Variation of Natural Grassland Vegetation Coverage and Its Relationship with Meteorological Factors in Northern Xinjiang from 1998 to 2018 |
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| Zhixiong HOU,Changqing JING,Gongxin WANG,Wenzhang GUO,Weikang ZHAO.Temporal and Spatial Variation of Natural Grassland Vegetation Coverage and Its Relationship with Meteorological Factors in Northern Xinjiang from 1998 to 2018[J].Journal of Agricultural Science and Technology,2023,25(2):140-151. |
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| Authors: | Zhixiong HOU Changqing JING Gongxin WANG Wenzhang GUO Weikang ZHAO |
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| Institution: | 1.Key Laboratory of Grassland Restoration and Environmental Information of Xinjiang； College of Resources and Environment，Xinjiang Agricultural University，Urumqi 830052，China;2.College of Grassland Industry，Xinjiang Agricultural University，Urumqi 830052，China |
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| Abstract: | In order to analyze the temporal and spatial changes of natural grassland vegetation coverage in different months of the growing season in Northern Xinjiang and its relationship with meteorological factors， the pixel dichotomy model， change rate analysis and correlation analysis were used to explore the temporal and spatial changes of natural grassland vegetation coverage and its relationship with meteorological factors in Northern Xinjiang in June， July， August and September from 1998 to 2018. The results showed that the vegetation coverages of natural grassland in Northern Xinjiang were lower in the middle and east with less precipitation and higher temperature， higher in the north， west and south with higher altitude， more precipitation and higher relative humidity， which increased from the middle and east to the north， west and south. In June， July， August and September， the natural grassland vegetation coverage in Northern Xinjiang showed no significant decreasing trend， in which the monthly average natural grassland coverage was June>July>September>August. The normalized difference vegetation index of natural grassland in Northern Xinjiang showed an increasing trend in July and decreasing trend in June， August and September. The monthly average natural grassland vegetation coverages in Northern Xinjiang were mainly positively correlated with precipitation and relative humidity in June， July and August， and were mainly positively correlated with temperature and sunshine hours in September. |
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| Keywords: | grassland fractional vegetation cover temporal and spatial variation meteorological factors correlation analysis |
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