摘要
以4个尾巨桉幼林林地土壤为研究对象，对土壤有机C、全N、全P、全K含量及其化学计量特征进行了研究。结果表明：土壤养分随着土层的加深而降低，土壤有机C和全N降幅较大，全P和全K降幅较小。4个林地土壤C/N比变化范围为7.95-21.78，平均值为12.36；土壤C/P比变化范围为23.85-57.52，平均值为40.85；土壤C/K比变化范围为3.61-13.09，平均值为9.05；土壤N/P比变化范围为1.24-7.36，平均值为4.30；土壤N/K比变化范围为0.18-2.37，平均值为1.05；土壤N/P比变化范围为0.16-0.35，平均值为0.25；土壤有机C与养分全量的N、P、K均呈正相关关系，其与全K呈现极显著正相关关系。
The soil organic C, total N, total P, total K content and stoichiometry in fourEucalyptusurophylla ×grandisplantations were studied. The results showed that with increasing soil depth the soil nutrients decreased including significant decreases in soil organic C and N whilst total P and total K decreased by smaller margins than C and N. The C/ N ratio ranged from 7.95 to 21.78, and the mean value was 12.36; the C/ P ratio ranged from 23.85 to 57.52, and the mean value was 40.85; the C/ K ratio ranged from 3.61 to 13.09 and the mean value was 9.05; the N/ P ratio ranged from 1.24 to 7.36, and the mean value was 4.30; the N/ K ratio ranged from 0.18 to 2.37, and the mean value was 1.05; and, the P/ K ratio ranged from 0.16 to 0.35, and the mean value was 0.25. Soil organic C and the total amount of the nutrients N, P and K were positively correlated with K.
出处
《桉树科技》
2014年第4期23-26,共4页
Eucalypt Science & Technology
基金
林业科技创新平台运行补助项目--广东湛江桉树生态系统定位观测研究站(2014-LYPT-DW-027)
关键词
尾巨桉
林地
化学计量特征
Eucalyptus urophylla × E. grandis
forest land
soil ecological stoichiometry
