• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>土壤圈（英文版） >Ammonia Volatilization and Nitrogen Utilization Efficiency in Response to Urea Application in Rice Fields of the Taihu Lake Region, China
【24h】

Ammonia Volatilization and Nitrogen Utilization Efficiency in Response to Urea Application in Rice Fields of the Taihu Lake Region, China

机译：太湖地区稻田氨氮的挥发和氮素利用效率对尿素的响应

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

摘要

Ammonia volatilization losses, nitrogen utilization efficiency, and rice yields in response to urea application to a rice field were investigated in Wangzhuang Town, Changshu City, Jiangsu Province, China. The N fertilizer treatments, applied in triplicate, were 0 (control), 100, 200, 300, or 350 kg N ha-1. After urea was applied to the surface water, a continuous airflow enclosure method was used to measure ammonia volatilization in the paddy field. Total N losses through ammonia volatilization generally increased with the N application rate, and the two higher N application rates (300 and 350 kg N ha-1) showed a higher ratio of N lost through ammonia volatilization to applied N. Total ammonia loss by ammonia volatilization during the entire rice growth stage ranged from 9.0% to 16.7% of the applied N. Increasing the application rate generally decreased the ratio of N in the seed to N in the plant. For all N treatments, the nitrogen fertilizer utilization efficiency ranged from 30.9% to 45.9%. Surplus N with the highest N rate resulted in lodging of rice plants, a decreased rate of nitrogen fertilizer utilization, and reduced rice yields. Calculated from this experiment, the most economical N fertilizer application rate was 227 kg ha-1 for the type of paddy soil in the Taihu Lake region. However, recommending an appropriate N fertilizer application rate such that the plant growth is enhanced and ammonia loss is reduced could improve the N utilization efficiency of rice.
机译：在中国江苏省常熟市王庄镇调查了稻田中尿素对氨气的挥发损失，氮素利用效率和水稻产量的影响。一式三份地施用的氮肥处理量为0（对照），100、200、300或350 kg N ha-1。将尿素施用到地表水中后，使用连续气流封闭法测量稻田中氨的挥发。氨挥发引起的总氮损失通常随施氮量的增加而增加，两个较高的氮施用量（分别为300和350 kg N ha-1）显示出氨挥发掉的氮与施用氮的比率更高。整个水稻生长阶段的挥发量为施氮量的9.0％至16.7％。增加施肥量通常会降低种子中氮与植物中氮的比率。对于所有氮处理，氮肥利用率为30.9％至45.9％。氮含量最高的过量氮导致水稻植株倒伏，氮肥利用率降低，水稻单产下降。根据该实验计算，对于太湖地区的水稻土，最经济的氮肥施用量为227 kg ha-1。但是，建议适当的氮肥施用量以促进植物生长并减少氨气损失可以提高水稻的氮利用效率。

著录项

  • 来源
    《土壤圈（英文版）》 |2007年第5期|639-645|共7页
  • 作者

  • 作者单位

    Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008,China;

    College of Resource and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095,China;

    College of Resource and Environmental Sciences, Fujian Agriculture & Forestry University, Fuzhou 350007,China;

    Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008,China;

    Department of Soil and Water Science, Tropical Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida, Homestead, FL33031 (USA);

    College of Resource and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095,China;

    Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008,China;

    Land and Environmental Management Group, AgResearch, Ruakura Research Centre, Private Bag 3123, Hamilton (New Zealand);

  • 收录信息 中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
  • 原文格式 PDF
  • 正文语种 chi
  • 中图分类 农业基础科学;
  • 关键词

    ammonia volatilization, N application rate, N utilization efficiency, paddy soil, rice yield;

    机译：氨挥发;氮肥施用量;氮素利用效率;水稻土;水稻产量;
  • 入库时间 2022-08-19 04:04:16
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