...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Communications in Soil Science and Plant Analysis >Short-Term Irrigation Level Effects on Residual Nitrate in Soil Profile and N Balance from Long-Term Manure and Fertilizer Applications in the Arid Areas of Northwest China
【24h】

Short-Term Irrigation Level Effects on Residual Nitrate in Soil Profile and N Balance from Long-Term Manure and Fertilizer Applications in the Arid Areas of Northwest China

机译：长期干旱对西北干旱区短期灌溉水平对土壤剖面硝态氮和氮平衡的影响

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

A field experiment was conducted to determine the effects of long-term applications of fertilizers and manure (1982 to 2003) and short-term irrigation level (2002 and 2003) on accumulation of nitrate nitrogen (NO3-N) in soil at Zhangye Oasis, China. The treatments included manure (M) and no manure (M0) as main plots; check (Ck), nitrogen (N), nitrogen + phosphorus (NP), and nitrogen + phosphorus + potassium (NPK) as subplots; and two amounts of irrigation (I1 and I2) as subsubplots. The application of N alone resulted in large NO3-N accumulation in soil, accounting for 6% of the applied N, and the lowest crop N recovery. Application of manure resulted in increased NO3-N in the soil profile compared to treatment with no manure, and the MN treatment resulted in the greatest amount of NO3-N in soil. Nitrogen applied with P and/or K reduced the amount of NO3-N in soil in both manure and no-manure treatments compared with N only. The unaccounted N was greatest (60%) in the N-alone treatment and lowest (30%) in the NPK treatment. When manure plus fertilizer were applied together, the unaccounted N ranged from 35%-42%. Based on results from only 2 years, greater amounts of irrigation (I2) caused greater leaching of NO3-N in the soil profile compared with I1, especially in treatments receiving manure. The implications of these findings are that these high amounts of accumulated NO3-N in surface and subsoil layers can be a potential threat to surface water, underground water, and air quality in the long run. This accumulated N in the soil profile can be used as a source of available N for future crops and should be recycled by using proper crop, soil, fertilizer, and water-management strategies/practices. The findings also suggest the need for further research to make an effective and efficient use of this accumulated NO3-N in the soil profile in order to save cost of N fertilizer application to future crops.
机译：进行了田间试验，以确定长期施用化肥和肥料（1982年至2003年）和短期灌溉水平（2002年和2003年）对张ye绿洲土壤硝态氮（NO3-N）积累的影响，中国。处理包括粪肥（M）和无粪肥（M0）作为主要地块。检查（Ck），氮（N），氮+磷（NP）和氮+磷+钾（NPK）作为子图;和两个灌溉量（I1和I2）作为子子图。单独施用氮肥会导致土壤中大量的NO3-N积累，占施用量N的6％，而作物N的回收率最低。与不施用粪肥相比，施用粪肥导致土壤剖面中NO3-N增加，而MN处理导致土壤中NO3-N含量最高。与仅施用氮肥相比，在施用肥料和不施用粪肥的情况下，施用磷和/或钾的氮肥减少了土壤中NO3-N的含量。在单独使用N的处理中，未解释的N最大（60％），而在NPK处理中的最低（30％）。当粪肥加肥料一起施用时，未测出的N在35％-42％之间。根据仅2年的结果，与I1相比，更大量的灌溉（I2）导致土壤剖面中NO3-N的淋溶增加，尤其是在施肥的处理中。这些发现的含义是，从长远来看，地表和地下土壤中大量的NO3-N累积可能对地表水，地下水和空气质量构成潜在威胁。土壤剖面中累积的氮可以用作未来作物的可用氮源，应通过采用适当的作物，土壤，肥料和水管理策略/措施进行回收。研究结果还表明需要进一步研究，以有效和有效地利用土壤中这种累积的NO3-N，以节省未来作物施用氮肥的成本。

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