• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Kasetsart Journal >Nitrogen Mineralization and Different Methods of Ammonium Determination of Some Paddy Soils in the North, Central, and Northeast Regions of Thailand
【24h】

Nitrogen Mineralization and Different Methods of Ammonium Determination of Some Paddy Soils in the North, Central, and Northeast Regions of Thailand

机译：泰国北部，中部和东北地区一些稻田土壤的氮矿化作用和不同铵态测定方法

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

High yields of rice are needed for fanner profitability and to provide this most important staple food and cash export crop of the country. Nitrogen fertilizer management is one of the key factors for high yielding of rice. Good management will reduce the contamination of the environment. Nitrogen mineralization or ammonium release after submergence is a useful index of nitrogen supplying capacity of the soils. The data is useful for effective fertilizer application. The study on ammonium release of 18 soil series which are the representative rice soils in the North, Central and Northeast regions of Thailand was performed. The results showed that ammonium release from 18 soils increased with time of submergence and the content reached the steady state at 4 weeks of submergence. The amount released of the soils followed the equation : Y = A-Be~(-ct) except in the four soils. The higher ammonification percentage was found in soils lower in total N and clay content. Mehlich 1 and 0.25 M H_2SO_4 were the promising extracting solutions for assessing the initial amount of ammonium in the dry soils.
机译：大米的产量需要提高粉丝的利润，并提供该国最重要的主食和现金出口作物。氮肥管理是水稻高产的关键因素之一。良好的管理将减少对环境的污染。淹没后的氮矿化或铵盐释放是土壤供氮能力的有用指标。该数据对于有效施肥很有用。对泰国北部，中部和东北部的18种代表性水稻土的铵盐释放进行了研究。结果表明，从18种土壤中释放出来的铵态氮随着浸没时间的增加而增加，并且在浸没4周后达到稳定状态。除四种土壤外，土壤的释放量遵循方程：Y = A-Be〜（-ct）。在总氮和粘土含量较低的土壤中发现较高的氨化百分比。 Mehlich 1和0.25 M H_2SO_4是用于评估干燥土壤中铵态氮含量的有前途的萃取解决方案。

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