...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Toxicology and Chemistry >TOXICITY OF NITROGENOUS FERTILIZERS TO EGGS OF SNAPPING TURTLES (CHELYDRA SERPENTINA) IN FIELD AND LABORATORY EXPOSURES
【24h】

TOXICITY OF NITROGENOUS FERTILIZERS TO EGGS OF SNAPPING TURTLES (CHELYDRA SERPENTINA) IN FIELD AND LABORATORY EXPOSURES

机译：氮肥对田间捕食鳄龟卵的毒性及实验室暴露

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

Many reptiles oviposit in soil of agricultural landscapes. We evaluated the toxicity of two commonly used nitrogenous fertilizers, urea and ammonium nitrate, on the survivorship of exposed snapping turtle (Chelydra serpentina) eggs. Eggs were incubated in a community garden plot in which urea was applied to the soil at realistic rates of up to 200 kg/ha in 2004, and ammonium nitrate was applied at rates of up to 2,000 kg/ha in 2005. Otherwise, the eggs were unmanipulated and were subject to ambient temperature and weather conditions. Eggs were also exposed in the laboratory in covered bins so as to minimize loss of nitrogenous compounds through volatilization or leaching from the soil. Neither urea nor ammonium nitrate had any impact on hatching success or development when exposed in the garden plot, despite overt toxicity of ammonium nitrate to endogenous plants. Both laboratory exposures resulted in reduced hatching success, lower body mass at hatching, and reduced posthatching survival compared to controls. The lack of toxicity of these fertilizers in the field was probably due to leaching in the soil and through atmospheric loss. In general, we conclude that nitrogenous fertilizers probably have little direct impacts on turtle eggs deposited in agricultural landscapes.
机译：许多爬行动物在农业景观土壤中产卵。我们评估了两种常用的氮肥（尿素和硝酸铵）对暴露的鳄龟卵（Chelydra serpentina）存活的毒性。在社区花园中孵化鸡蛋，2004年将尿素以不超过200千克/公顷的实际用量施于土壤，而硝酸铵则在2005年以不超过2000千克/公顷的用量施于土壤。不受操纵，并受环境温度和天气条件的影响。鸡蛋也要在实验室的有盖垃圾箱中暴露，以最大程度地减少因挥发或从土壤中沥出的含氮化合物的损失。尽管硝酸铵对内生植物有明显的毒性，但在花园中暴露时，尿素和硝酸铵都不会影响孵化的成功或发育。与对照组相比，两次实验室暴露均导致孵化成功率降低，孵化时体重降低以及孵化后存活率降低。这些肥料在田间缺乏毒性，可能是由于土壤中的淋溶和大气损失所致。总的来说，我们得出的结论是，氮肥可能对农业景观中沉积的龟卵几乎没有直接影响。

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