• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Soil Science Society of America Journal >Evaluation of Some Indices of Potentially Mineralizable Nitrogen in Soil
【24h】

Evaluation of Some Indices of Potentially Mineralizable Nitrogen in Soil

机译：土壤中潜在矿化氮某些指标的评价

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 series of soil N mineralization indices were evaluated using 153 samples chosen from arable fields representing a wide range of soil types, management practices, and climatic zones. These indices were compared against potentially mineralizable N (N0) determined by aerobic incubation at 25°C for 24 wk. Three different pools of mineralizable N were recognized: Pool I, the mineralization flush on rewetting in the first 2 wk; Pool II, gross N mineralization in the next 22 wk; and Pool III, the potentially mineralizable N, predicted from the fitted curve, that did not mineralize during the incubation period. Pool I was highly correlated with CaCl2–N, KCl-NH4, and KCl-NO3, which extract soil mineral N. Pool III was significantly correlated with ultraviolet absorbance of NaHCO3 extract at 205 and 260 nm (NaHCO3–205 and –260), Illinois soil N test, NaOH direct-distillation N, and hot KCl-NH4, which mostly extract hydrolyzable organic N. All indices except the mineral N based methods, phosphate-borate buffer method, and microbial biomass C were significantly related to N0, which includes both Pools II and III. The NaHCO3–260, NaOH direct-distillation N, and Illinois soil N test had the highest correlations with N0 (r2 = 0.74, 0.61, and 0. 51, respectively). Total organic C and N represent long-term changes in N0 and were almost as effective in predicting N0 as the other indices (r2 = 0.60 and 0.67, respectively); however, they would be expected to be less sensitive to short-term changes in N0 due to changes in soil management practices and history.
机译：使用选自土壤田间，耕作方式和气候带等广泛耕地的 153个样本评估了一系列土壤N矿化指数。将这些 指标与潜在可矿化的N（N 0 ） 进行比较，该氮是通过在25°C下进行24周有氧温育确定的。识别出三个 矿化氮的不同矿池：矿池I， 在前2周重新润湿后矿化冲洗； Pool II，接下来22周的总N矿化度；池III， 根据拟合曲线预测的可能矿化的N， ，在孵育期间未矿化。池I 与CaCl 2 –N，KCl-NH 4 和KCl-NO 3 高度相关， 提取土壤矿质N。PoolIII与205和260 的NaHCO 3 提取物的紫外线吸收显着相关。 nm（NaHCO 3 –205和–260），伊利诺伊州土壤N测试， NaOH直接蒸馏N和热KCl-NH 4 大部分提取 可水解有机氮。除基于矿物的N 方法，磷酸盐-硼酸盐缓冲液方法和微生物生物量 C以外的所有指标均显着相关到N 0 ，其中包括Pools II和III。 NaHCO 3 –260，NaOH直接蒸馏N， 和伊利诺伊州土壤N检验与N 0 的相关性最高。 sup>（r 2 = 0.74、0.61和0. 51）。总有机C 和N代表N 0 的长期变化，并且在预测N 0 时几乎一样有效。与其他指标一样（分别为r 2 = 0.60和0.67）；但是， 对短期 的敏感性较低。 N 0 的变化归因于土壤管理实践和 历史的变化。

著录项

  • 来源
    《Soil Science Society of America Journal》 |2007年第4期|1233-1239|共7页
  • 作者

    M. Sharifi; B. J. Zebarth; D. L. Burton; C. A. Grant; J. M. Cooper;

  • 作者单位

    Agriculture and Agri-Food Canada, Potato Research Centre, P.O. Box 20280, Fredericton, NB, Canada E3B 4Z7,Agriculture and Agri-Food Canada, Brandon Research Centre, Grand Valley Rd., Brandon, MB, Canada R7A 5Y3;

    Dep. of Environmental Science, Nova Scotia Agricultural College, P.O. Box 550, 21 Cox Rd., Truro, NS, Canada B2N 5E3,Agriculture and Agri-Food Canada, Brandon Research Centre, Grand Valley Rd., Brandon, MB, Canada R7A 5Y3;

    Agriculture and Agri-Food Canada, Potato Research Centre, P.O. Box 20280, Fredericton, NB, Canada E3B 4Z7,Agriculture and Agri-Food Canada, Brandon Research Centre, Grand Valley Rd., Brandon, MB, Canada R7A 5Y3;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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