• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>European Journal of Plant Pathology >Assessment of the spread of chestnut ink disease using remote sensing and geostatistical methods
【24h】

Assessment of the spread of chestnut ink disease using remote sensing and geostatistical methods

机译：利用遥感和地统计学方法评估板栗墨水病的传播

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

Chestnut ink disease, caused by Phytophthora cinnamomi and P. cambivora, is responsible for important economic losses and limits the establishment of new chestnut (Castanea sativa) groves in Portugal. Although the differences in soil properties and in cropping practices affect ink severity, the regional spread of disease is not known. Data for monitoring C. sativa decline were obtained by using field surveys and Small Format Aerial Photography (SFAP), a reliable tool which provides large-scale imagery obtained at low altitude. Visible colour and near-infrared images were obtained with different cameras with an average ground resolution of 22, 14 and 39 cm. The spatial distribution of ink disease in northern Portugal for the years 1995–2004 was estimated through a geostatistical method, and the estimation of precision was determined. From 1995–2002, the chestnut population in the study area increased by 18.5% due to new orchard plantations. After 2002 the population decreased because the new plantations were not sufficient to recover the number of dead chestnut trees, killed mostly by ink disease. The directional semivariograms indicated anisotropy with a greater disease spread in the NE–SW direction. This direction corresponds to site areas at the same altitude, where soil tillage and human mobility are higher.
机译：由Phytophthora cinnamomi和P. cambivora引起的栗色病是造成重大经济损失的原因，并限制了葡萄牙新栗树（Castanea sativa）林的建立。尽管土壤性质和种植方式的差异会影响油墨的强度，但尚不清楚疾病的区域传播。通过实地调查和小型航空摄影（SFAP）获得了用于监测苜蓿中华。下降的数据，SFAP是一种可靠的工具，可提供在低海拔获得的大规模图像。用不同的相机获得可见的彩色和近红外图像，平均地面分辨率分别为22、14和39 cm。通过地统计方法估计了葡萄牙北部1995-2004年水墨病的空间分布，并确定了精度。从1995年到2002年，由于新果园的种植，研究区的栗子数量增加了18.5％。 2002年之后，人口减少，因为新的种植园不足以恢复死去的栗树，死树主要是因墨水病而死亡。方向半变异函数表明各向异性，在NE-SW方向上传播的疾病更大。该方向对应于相同海拔高度的耕地面积，在该海拔高度上土壤耕作和人类活动能力较高。

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