张权峰,王益权,赵晓进,胡明,景小丽.关中东部地区农田土壤养分演化趋势——以临渭区为例[J].干旱地区农业研究,2013,31(2):78~83
关中东部地区农田土壤养分演化趋势——以临渭区为例
Variation trend of soil nutrients in farmlands in east Guanzhong plain——A case study of Linwei District
  
DOI：10.7606/j.issn.1000-7601.2013.02.15
中文关键词:  土壤肥力  临渭区  农田
英文关键词:soil fertility  Linwei District  farmland
基金项目:
作者单位
张权峰 西北农林科技大学资源环境学院, 陕西 杨凌 712100； 渭南市农产品安全质量检验检测中心， 陕西 渭南 714000； 渭南市农业技术推广中心， 陕西 渭南 714000 
王益权 西北农林科技大学资源环境学院, 陕西 杨凌 712100 
赵晓进 渭南市农业技术推广中心， 陕西 渭南 714000 
胡明 渭南师范学院， 陕西 渭南 714000 
景小丽 渭南市农业技术推广中心， 陕西 渭南 714000 
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中文摘要:
      以临渭区2007—2010年测土配方施肥项目土壤监测数据和第二次全国土壤普查资料为基础，分析研究关中东部地区农田土壤养分状况及其变异趋 势。结果表明，临渭区农田土壤有机质、全氮、碱解氮、有效磷平均含量均比1982年土壤普查时有了很大程度的提高，分别提高了6.02 g·kg-1、0.21 g·kg-1、28.6 mg·kg-1、13.6 mg·kg-1。土壤速效钾平均含量比第二次土壤普查时降低了12.6 mg·kg-1，农田土壤有效铁、有效锰、有效铜、有效锌等微量元素的平均含量与1982年前相比有不同程度提高，分别提高了3.157 mg·kg-1、2.305 mg·kg-1、1.485 mg·kg-1、0.852 mg·kg-1。由此可看出，临渭区农田土壤有机质、全氮、碱解氮、有效磷均呈累积态势；耕层土壤氮素盈余、磷素富积、钾素虽有减少，但仍处于适量状态，有效硫和有效锌在田块间盈缺不一，有效铁、有效锰处于普遍缺乏状态，有效铜较为丰富。
英文摘要:
      Based on the monitoring data of soil testing and fertilization project conducted in Linwei District in 2007—2010 and the second nationwide general soil survey data, the status and variation trend of soil nutrients in farmlands in east Guanzhong plain was analyzed. The results showed that the contents of soil organic matter, total N, alkali hydrolyzable N and available P were greatly increased by 6.02 g·kg-1, 0.21 g·kg-1, 28.6 mg·kg-1 and 13.6 mg·kg-1 respectively, but the average content of exchangeable K was decreased by 12.6 mg·kg-1, compared with the data given in the second soil survey in 1982. The average contents of micro elements such as available Fe, available Mn, available Cu and available Zn in the soil were also increased by 3.157 mg·kg-1, 2.305 mg·kg-1, 1.485 mg·kg-1 and 0.852 mg·kg-1 respectively, compared with the data in 1982. It was concluded that the soil organic matter, total N, alkali-hydrolyzable N and available P tended to be accumulated. As a whole, the soil nitrogen was surplus, the phosphorus was accumulated, while the potassium was decreased but it was still at adequate level; the situation of available S and available Zn varied among different fields; the available Fe and available Mn were generally short; and the available Cu was relatively rich.
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