• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International journal of remote sensing >Monitoring of forage conditions with MODIS imagery in the Xilingol steppe, Inner Mongolia
【24h】

Monitoring of forage conditions with MODIS imagery in the Xilingol steppe, Inner Mongolia

机译：内蒙古锡林郭勒草原利用MODIS影像监测草料状况

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A study was conducted to determine the potential suitability of Terra/MODIS imagery for monitoring short-term phenological changes in forage conditions in a semi-arid region. The study sites included four meadow steppes and six typical steppes in the Xilingol steppe in central Inner Mongolia, China. The live biomass, dead standing biomass, total biomass, crude protein (CP) concentration and standing CP were estimated from early April to late October using the Enhanced Vegetation Index (EVI) values from Terra imagery (500m pixels). Applying regression models, the EVI accounted for 80% of the variation in live biomass, 42% of the dead biomass, 77% of the total biomass, 11% of the CP concentration and 74% of the standing CP. MODIS/EVI is superior to AVHRR/NDVI when estimating forage quantity. Applying these results, the seasonal changes in live biomass and the standing CP could be described in the selected four sites with different degrees of grazing intensity. Generally, the increase in grazing intensity tended to decrease live biomass and standing CP. It was suggested that the EVI obtained from Terra imagery was an available predictor of the forage condition as measured by live biomass and standing CP. The MODIS/EVI values could provide information on the suitable timing of cutting for hay-making and nutritive value to range managers.
机译：进行了一项研究，以确定Terra / MODIS图像在监测半干旱地区饲草条件的短期物候变化方面的潜在适用性。研究地点包括中国内蒙古中部锡林郭勒草原的四个草甸草原和六个典型草原。使用Terra Terrain影像（500m像素）的增强植被指数（EVI）值，从4月初到10月下旬估算了活生物量，死生物量，总生物量，粗蛋白（CP）浓度和站立CP。应用回归模型，EVI占活生物量变化的80％，死生物量的42％，总生物量的77％，CP浓度的11％和常规CP的74％。在估算草料数量时，MODIS / EVI优于AVHRR / NDVI。应用这些结果，可以在选定的四个放牧强度程度不同的地点描述活生物量和固定CP的季节性变化。通常，放牧强度的增加趋向于降低活生物量和持续CP。建议从Terra影像中获得的EVI是通过活生物量和常规CP测得的草料状况的可用预测指标。 MODIS / EVI值可以为范围管理者提供有关适当的割草时间和营养价值的信息。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号