欢迎访问《中国农学通报》，
中国农学通报

中国农学通报 ›› 2009, Vol. 25 ›› Issue (24): 428-433.

• 目次 • 上一篇    下一篇

长期施肥下红壤旱地CO2、N2O排放特征

黄 晶,刘宏斌,王伯仁   

  • 收稿日期:2009-09-03 修回日期:2009-10-10 出版日期:2009-12-20 发布日期:2009-12-20
  • 基金资助:

    973项目;“十一五”国家科技支撑计划

CO2、N2O Emission from red soil dry-land under long-term fertilization

  • Received:2009-09-03 Revised:2009-10-10 Online:2009-12-20 Published:2009-12-20

PDF (PC)

1164

摘要：

摘 要：基于中国农业科学院红壤实验站长期定位试验，采用静态箱/气相色谱法，研究红壤旱地小麦生长季节不同施肥处理(CK、NP、NPK、NPKM、1.5NPKM)下土壤CO2、N2O排放差异。结果表明，长期不同施肥处理形成不同的土壤肥力以及作物生长的差异是影响土壤呼吸CO2、N2O排放的重要因素，红壤旱地小麦季土壤呼吸CO2、N2O排放具有明显的季节变化特征；在小麦生长季，不同施肥处理之间土壤呼吸CO2、N2O排放通量差异显著，土壤呼吸CO2年累积排放量在8284.02 kg?ha-1～15863.48 kg?ha-1之间，N2O年累积排放量在0.37 kg?ha-1～2.04 kg?ha-1之间。各处理土壤呼吸CO2排放通量的大小变化：1.5NPKM>NPKM>NPK>CK>NP；土壤呼吸N2O平均排放通量大小顺序为1.5NPKM>NPKM>NPK>NP>CK；有机肥的施用显著增加了土壤呼吸CO2和N2O的排放(P<0.05)。土壤呼吸CO2与N2O排放分别与土壤温度和土壤水分显著相关性。

关键词: 甜玉米, 甜玉米, 区域试验, 地点鉴别力, AMMI模型

Abstract:

Abstract: Diurnal variation of soil respiration affected by long-term different fertilization at various growth stages of wheat in red soil dry-land was investigated with the static dark chamber method and gas chromatograph technique at the Experimental station of red soil CAAS. Results show that the different soil fertility and crop growth under long-term different fertilization is an important factor to effect the soil CO2, N2O emissions. During the growth stages of wheat, soil respiration rate displayed an obvious seasonal curve. CO2, N2O emission fluxes in different experimental treatments had significant differences Cumulative emissions of CO2 and N2O in the year varying in the range of 8284.02 kg?ha-1～15863.48 kg?ha-1 and 0.37 kg?ha-1～2.04 kg?ha-1. In terms of the effect of fertilization, the CO2 emissions followed an order of 1.5NPKM>NPKM>NPK>CK>NP, and N2O emissions followed an order of 1.5NPKM>NPKM>NPK>NP>CK, The treatment with organic manure increase in CO2 and N2O emissions significantly (p < 0.05) than the others. The change of CO2 emissions was obviously related to soil temperature, but the change of N2O emissions was obviously related to soil water content.