• 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 >Research on the threshold of aluminum toxicity and the alleviation effects of exogenous calcium, phosphorus, and nitrogen on the growth of Chinese fir seedlings under aluminum stress.
【24h】

Research on the threshold of aluminum toxicity and the alleviation effects of exogenous calcium, phosphorus, and nitrogen on the growth of Chinese fir seedlings under aluminum stress.

机译：研究铝胁迫的阈值以及铝胁迫下外源钙，磷和氮对杉木幼苗生长的缓解作用。

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

Chinese fir (Cunninghamia Lanceolata Lamb, Hook) is generally considered a superior timber in southern China and other areas in the world. In the past few decades, aluminum (Al) toxicity has become one of biggest stress factors in the production and growth of Chinese fir, although this species prefers an acidic environment. To date, the selection of indicator species for Al toxicity remains critical in the field, and Al toxicity has not been successfully treated by artificially controlling Chinese fir plantations. To assess the Al toxicity risk, the height of the dominant tree, the concentration of calcium (Ca2+)/Al3+ in soil solution, and the concentration of Ca2+/[Ca2++iron (Fe3+)+Al3+] in litter leached organic acids were introduced. The results indicated that eight plots had suffered Al toxicity. The threshold of Al toxicity was 37.53 mg kg-1 in soil or 1.39 mmol L-1 in soil solution, a pH of 4.15, a Ca2+/(Ca2++Fe3+ + Al3+) molar ratio of 0.487, and a Ca2+/Al3+ molar ratio of 1.599. The positive effects of exogenous nutrition (Ca, phosphorus [P], and nitrogen [N]) on the growth of Cunninghamia lanceolata seedlings was also studied in pot experiments based on results in the field. The cation nutrition can lead to detoxification, and the exogenous nutrition thresholds were Ca2+/Al3+ >=2.8, phosphorus (P)/Al3+ >=4.4, ammonium (NH4 -)-nitrogen (N)/Al3+ >=4.5. The data presented in this study are very helpful for the understanding of the degree of Al toxicity and have notable significance for the management of Chinese fir plantations.
机译：在中国南方和世界其他地区，杉木（Cunninghamia Lanceolata Lamb，Hook）通常被认为是优质木材。在过去的几十年中，铝（Al）的毒性已成为杉木生产和生长的最大压力因素之一，尽管该物种更喜欢酸性环境。迄今为止，铝毒性指示剂种类的选择在该领域仍然很关键，并且通过人工控制杉木人工林还没有成功地处理铝毒性。为了评估Al毒性风险，优势树的高度，土壤溶液中钙（Ca 2 + ）/ Al 3 + 的浓度以及Ca的浓度垃圾中的 2 + / [Ca 2 + +铁（Fe 3 + ）+ Al 3 + ]引入有机酸。结果表明，八块地块均具有铝毒性。 Al的毒性阈值为在土壤中为37.53 mg kg -1 或在土壤溶液中为1.39 mmol L -1 ，pH为​​4.15，Ca 2+ < / sup> /（Ca 2 + + Fe 3 + + Al 3 + ）摩尔比为0.487，Ca 2 + / Al 3 + 摩尔比为1.599。在盆栽试验的基础上，还根据田间试验结果研究了外源营养（Ca，磷[P]和氮[N]）对杉木的生长的积极影响。阳离子营养可导致排毒，外源营养阈值为Ca 2 + / Al 3 + 4 -）-氮（N）/ Al 3 +

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