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中国农学通报

中国农学通报 ›› 2010, Vol. 26 ›› Issue (24): 188-192.

所属专题： 烟草种植与生产

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

重庆市植烟区不同肥力植烟土壤氮素矿化特性研究

韩晓飞 郑文冉 徐畅 慈恩 高明 杨超 马啸   

  • 收稿日期:2010-06-13 修回日期:2010-07-07 出版日期:2010-12-20 发布日期:2010-12-20
  • 基金资助:

    国家科技支撑计划及重庆市烟叶公司

Study on Nitrogen mineralization characteristics of different fertility soils in tobacco-growing areas of Chongqing

  • Received:2010-06-13 Revised:2010-07-07 Online:2010-12-20 Published:2010-12-20

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摘要：

通过室内培养试验研究了重庆市植烟区不同肥力植烟土壤氮素矿化规律，求得土壤氮素矿化参数，并探讨了氮素矿化潜势（N0）、有机质、全氮、pH、碱解氮之间的关系。结果表明，在35℃条件下培养，一级动力学方程能够很好的拟合氮素的矿化过程，相关系数均达到显著水平（r高肥力土=0.976、r中肥力土=0.986、r低肥力土=0.996），不同肥力土壤氮素矿化量存在显著差异。矿化潜势(N0)为：高肥力土（25.0mg?kg-1±0.60）﹥中肥力土（21.5mg?kg-1±0.61）﹥低肥力土（19.7mg?kg-1±1.14）；矿化速率（k）为：低肥力土（0.1596mg?kg-1?d-1±0.0104）﹥中肥力土（0.1492mg?kg-1?d-1±0.0155）﹥高肥力土（0.1029mg?kg-1?d-1±0.0071）。矿化潜势(N0)与全氮、有机质呈正相关，相关系数分别为0.9799和0.9788，与pH之间呈负相关（R=-0.9784）。表明不同肥力植烟土壤的供氮能力存在差异，在肥料管理上要因土、因时施肥。

关键词: 国外大豆资源, 国外大豆资源, 利用, 小粒大豆品种, 创新

Abstract:

Through the method of indoor culture experiment, the rule of Nitrogen mineralization on different fertility soils in tobacco-growing areas of Chongqing was studied. According to the results of this experiment, the soil nitrogen mineralization parameter was obtained, and the relationship between mineralization potential(N0),organic matter, total nitrogen, pH and available nitrogen was discussed.　The results showed that the first order dynamic model can excellent fit experimental data under 35℃.The correlation coefficients and the amount of soil mineralized nitrogen showed a high significance（r high fertile soil=0.976、r fertile soil=0.986、r low fertile soil=0.996），and the amount of soil mineralized nitrogen between different fertility showed the significant difference too.　The sequence of soil nitrogen mineralization potential(N0) was：Soil nitrogen mineralization potential（N0）comparison:　high fertile soil（25.0mg kg-1±0.60）>fertile soil（21.5mg kg-1±0.61）>low fertile soil（19.7mg kg-1±1.14）；The sequence of mineralization rate was：low fertile soil（0.1596mg kg-1 d-1±0.0104）>fertile soil（0.1492mg kg-1 d-1±0.0155）>high fertile soil（0.1029 mg kg-1 d-1±0.0071）.There were different degree of positive correlation between total N、the organic matter、pH and Nitrogen mineralization potential（N0）. So, we should manure depend on the situation of the soil and the climate in the respect of fertility management.