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应用生态学报 ›› 2016, Vol. 27 ›› Issue (3): 688-696.doi: 10.13287/j.1001-9332.201603.025

• 目次 • 上一篇    下一篇

不同典型地带性土壤氮素分布特征及其影响因素

曹小闯1, 钟楚1, 马庆旭2, 朱练峰1, 张均华1, 禹盛苗1, 金千瑜1, 吴良欢2*   

  1. 1中国水稻研究所/水稻生物学国家重点实验室, 杭州 310006;
    2浙江大学环境与资源学院/教育部环境修复与生态健康重点实验室, 杭州 310058
  • 收稿日期:2015-06-26 出版日期:2016-03-18 发布日期:2016-03-18
  • 通讯作者: * E-mail: finm@zju.edu.cn
  • 作者简介:曹小闯,男,1985年生,助理研究员.长期从事土壤氮养分循环、水稻好氧栽培、水稻氮素生理生态效应等研究,发表SCI和国内核心期刊论文13篇.E-mail:caoxiaochuang@126.com
  • 基金资助:
    本文由浙江省自然科学基金项目(LQ15C130004)、国家自然科学基金项目(31172032,31172032)和国家重点基础研究发展计划项目(2015CB150502)资助

Distribution characteristics of soil nitrogen and its influence factors in different typical zonal soils

CAO Xiao-chuang1, ZHONG Chu1, MA Qing-xu2, ZHU Lian-feng1, ZHANG Jun-hua1, YU Sheng-miao1, JIN Qian-yu1, WU Liang-huan2*   

  1. 1State Key Laboratory of Rice Biology/China National Rice Research Institute, Hangzhou 310006, China;
    2Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
  • Received:2015-06-26 Online:2016-03-18 Published:2016-03-18
  • Contact: * E-mail: finm@zju.edu.cn
  • Supported by:
    The work was supported by Zhejiang Provincial Natural Science Foundation of China (LQ15C130004), National Natural Science Foundation of China (31172032, 31270035) and National Key Basic Research Program of China (2015CB150502)

摘要: 在野外取样的基础上,研究中国不同典型地带性土壤各形态氮素分布特征及其影响因素.结果表明: 垂直地带性土壤中0.5 mol·L-1 K2SO4提取的提取态总氮、提取态有机氮、吸附氨基酸随取样点海拔的增加而显著增加,且提取态总氮、提取态有机氮和吸附氨基酸平均值都大于水平地带性土壤;水平地带性土壤各形态氮含量随土壤类型的不同而差异显著.土壤吸附氨基酸含量是游离氨基酸的5倍,占提取态有机氮百分比为21.1%,表明吸附氨基酸可能作为土壤有机氮库的一种重要存在形态.相关分析结果表明,垂直地带性土壤中提取态总氮、提取态有机氮、铵态氮、氨基酸态氮均与有机质、全氮呈显著正相关(r=0.57~0.93,P<0.05),但与pH、硝态氮呈显著负相关(r=-0.37~-0.91,P<0.05);水平地带性土壤pH与提取态总氮、硝态氮、有机质、全氮、碱解氮及盐基离子(K+、Ca2+、Mg2+)呈显著正相关(r=0.36~0.85,P<0.05),与铵态氮、氨基酸态氮呈显著负相关(r=-0.39~-0.81,P<0.05).

Abstract: On the basis of field soil sampling, this paper investigated the distribution characteristics of soil different nitrogen (N) forms and its influence factors in the different typical zonal soils. The results showed that the concentrations of soil extractable total N, extractable organic N and adsorbed amino acids extracted with 0.5 mol·L-1 K2SO4 significantly increased along the altitudinal gradient in the different vertical soils, and their mean concentrations were greater than that in the horizontal soils. The concentrations of soil different N forms widely varied with the soil type in the different horizontal soils. On average, the concentration of soil adsorbed amino acids was approximately 5-fold greater than that of the free amino acids, representing 21.1% of soil extractable organic N. It indicated that the soil adsorbed amino acids extracted with the strong salt solution could serve as an important form of soil organic N. Pearson correlation analysis showed that extractable total N, extractable organic N, ammonium and amino acids in vertical soils were positively correlated with soil organic matter and total N (r=0.57-0.93, P<0.05), but negatively correlated with soil pH and nitrate (r=-0.37--0.91, P<0.05). In the horizontal soils, soil extractable total N, nitrate, organic matter, total N, alkali-hydrolyzable N and cation ions (e.g. K+, Ca2+, Mg2+) were all positively correlated with soil pH (r=0.36-0.85, P<0.05), whereas negatively correlated with soil ammonium and amino acids (r=-0.39--0.81, P<0.05).