摘要
为探讨森林植被演替过程中土壤有机碳含量及其季节性变化，本研究选取太行山南麓不同演替阶段典型植被群落类型：裸地、草地（白草Pennisetum flaccidum）群落、灌木I（荆条Vitex negundo L．var）群落、灌木Ⅱ（酸枣Ziziphus jujuba var）群落、20a（检皮栎Quercus variabilis）人工林、40a（栓皮栎quercus variabilis）人工林不同土层（0～20、20—40、40—60cm）土壤有机碳及土壤活性有机碳进行研究。结果表明，土壤有机碳及土壤活性有机碳含量表现出随植被演替的推进而逐渐增加的规律性，人工林土壤有机碳含量比演替初期植被类型土壤有机碳含量有了明显增长，且差异显著（P〈0．05）。6种植被类型土壤有机碳含量随土层深度增加而逐渐降低，均呈现一定程度的表聚性。不同演替阶段土壤有机碳及土壤活性有机碳含量受植物生长节律及环境因素的影响，呈现出显著的季节性变化。由此得出，植被演替的正向发展是增加森林土壤碳库的有效途径。
In order to investigate the content of vertical and the seasonal variations of SOC under differ- ent natural succession stages,soils samples at different depth （0 -20, 20 - 40, 40- 60 cm）were col- lected from six vegetation types：bare land stage, grass stage, shrub stage I （ Vitex negundo L. var） , shrub stage H （Ziziphus jujuba var） ,trees stage of 20 a, trees stage of 40 a. The results showed that the content of SOC and DOC increased with the community succession. The soil organic carbon content of plantation had an obvious increase compared with the early succession of vegetation types, and the difference was significant （P 〈 0.05）. The soil organic carbon content of six vegetation types gradual- ly reduced with the increase of soil depth and concentrated on the surface of the soil. Seasonal varia- tions of SOC and DOC had significant seasonal regularity by the affection of plant growth rhythm and environmental factors. In short, the positive development of vegetation succession was the effective way to increase forest soil carbon pool .
出处
《河南农业大学学报》
CAS
CSCD
北大核心
2016年第3期318-324,共7页
Journal of Henan Agricultural University
基金
国家自然科学基金项目(31270493)
中国科学院植物研究所植被与环境变化国家重点实验室2012年开放课题(LVEC-2012kf06)
关键词
太行山南麓
演替
土壤有机碳
土壤可溶性有机碳
季节变化
southern foot of Taihang Mountains
succession
soil organic carbon
Soil dissolved organ- ic carbon
seasonal dynamics
