• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Beltwide Cotton Conferences >Predicting cotton nematodes distribution utilizing soil electrical conductivity
【24h】

Predicting cotton nematodes distribution utilizing soil electrical conductivity

机译：利用土导电性预测棉线线虫分布

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The overall objective of this work is to develop and test concepts and technologies for site-specific detection and control of plant-parasitic nematodes with the aim of optimizing farm profit while minimizing the effect of production practices on the environment. Nematodes cause over 250 million dollar in yield losses to cotton in the United States each year. Farmers usually apply one rate of a nematicide across an entire field to protect their crop from these nematodes. However, nematodes are notuniformly distributed within fields, and there may be substantial acreage in most fields where nematodes are either not present, or are not an economic concern. Applying a nematicide at one rate over the entire field can be both costly and inefficient. Using soil electrical conductivity to predict the distribution of soil textures and nematodes within a field is achievable in a sandy or loamy sand soil type. This will allow placement of nematicides in portions of the field with soil textures that have the highest probability of containing significant levels of specific nematode species, which are being targeted for control. There was a strong positive correlation between increasing incidence of Columbia lance nematode with increased sand content both at planting and at harvest. An increase of nine percent in clay content of the sandy loam soil resulted in a 57 percent reduction in nematode population density. Ring nematodes were recovered in significant numbers both at planting and at harvest only from plots with the highest levels of sand.
机译：这项工作的总体目标是为植物寄生线路的特定现场检测和控制进行制定和测试概念和技术，以优化农业利润，同时最大限度地减少生产实践对环境的影响。每年，线虫导致美国的产量亏损超过2.5亿美元。农民通常在整个场上施加一次境内境域的速率以保护他们的作物免受这些线虫的影响。然而，线虫在田地内分布出来，并且在大多数领域中可能存在实质的面积，其中线虫不存在，或不是经济问题。在整个场上以一个速率应用界面既昂贵又低效。利用土壤导电率来预测砂土或壤土土壤中的土壤纹理和线虫的分布是可实现的。这将允许在具有含有最高含量的特异性线虫物种的土壤纹理中放置界面的部分，其具有靶向对照的特异性线虫物种的最高概率。哥伦比亚云线虫增加率与种植和收获时的砂质含量增加，存在良好的正相关性。砂土土壤中粘土含量增加九倍的百分之九，导致线虫群密度降低了57％。在种植和收获中仅在种植含量最高水平的砂层中以显着的数量回收环线虫。

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