长期施肥对西南黄壤碳氮磷生态化学计量学特征的影响

发布时间：2019-08-19 07:16

【摘要】：为了解长期不同施肥措施下黄壤碳、氮、磷生态化学计量学特征,研究以贵州黄壤长期定位试验2003~2013共11年土样为研究对象,测定分析土壤碳、氮、磷养分及生态化学计量指标变化特征,旨为黄壤培肥、增加土壤碳汇提供重要理论依据。结果表明:(1)长期不同施肥措施下,有机碳、全氮、全磷含量变化较一致,均以有机肥处理较高,且随有机肥施用量增加而增加;(2)不同处理土壤C/N、C/P、N/P比变化范围为13.49~15.58、13.72~17.86、0.99~1.28,通过各处理变异系数和碳、氮、磷两两相关分析可知,黄壤C/N比较稳定,碳氮变化一致,而C/P、N/P比变化较大;(3)C/N、C/P比与有机碳呈极显著正相关关系,N/P比与全氮呈极显著正相关关系,但相关系数各不同;(4)与中国和世界土壤C/N/P比平均水平相比,黄壤碳、氮、磷比例失衡。
[Abstract]:In order to understand the ecological chemometrics characteristics of carbon, nitrogen and phosphorus in yellow soil under different fertilizer application measures for a long time, the soil samples of Guizhou yellow soil long-term positioning experiment 2003 / 2013 were studied. The changes of soil carbon, nitrogen, phosphorus nutrients and ecological stoichiometric indexes were determined and analyzed in order to provide an important theoretical basis for the cultivation of yellow soil fertilizer and the increase of soil carbon sequestration. The results showed that: (1) under different fertilizer measures for a long time, the contents of organic carbon, total nitrogen and total phosphorus changed in the same way, and the organic fertilizer treatment was higher and increased with the increase of organic fertilizer application rate; (2) the variation range of C 鈮，

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