摘要
以黄土丘陵沟壑区的子午岭人工油松林区的土壤为研究对象,综合研究了不同管理措施,不同深度土壤的腐殖质组成、结合形态及胡敏酸的光学特征。结果表明:不同管理方式下土壤腐殖质各组分有机碳含量为胡敏素(HM)>富里酸(FA)>胡敏酸(HA),其对土壤腐殖质组分和结合形态的影响主要集中在0-40cm土层之间;PQ值天然油松林(N)>粗放管理型(E)>精细管理型(F),油松林各层土壤的PQ均小于26%;E4/E6和色调系数(ΔlogK)的值为F>E>N,RF的平均值为N>E>F。综合研究表明,天然油松林土壤有机碳的腐殖化程度和芳化度较人工油松林显著提高,说明人为干扰不利于土壤腐殖质品质的提高,反而使其腐殖化程度下降,降低土壤胡敏酸的氧化稳定性,不利于森林土壤的肥力发展。
Taking the natural Pinus tabulaeformis forest soil in the Ziwuling mountain of Loess Plateau as experiment objects,different management mode and soil humus composition as well as morphology and its optical characteristics in different depths have been comprehensively investigated.The results show that：there is a trend of organic carbon content which show thatHumin （HM）〉Fulvic acid（FA）〉Humic acid （HA） under the different management mode,meanwhile,it plays a significant affect on the soil organic matter content and binding forms during the depth range of 0-40 cm;radio of loose/tight and loose/stability of fine-management is higher than extensive-management which indicate that fine-management is better to improve the soil fertility.PQ has a trend of N （Natural Pinus tabulaeformis forest）〉E （Extensive management）〉F （Fine management）,where its PQ is less than 26% at each mayor of the natural Pinus tabulaeformis forest soil.Also,the value of E4/E6 and hue coefficient（logK）demonstrate that F〉E〉N;the study proves that humification degree in natural Pinus tabulaeformis forest soil is significantly higher than artificial chinese pine forest which demonstrate that human disturbance is harmful to the improvement of humification degree and lead to the reduce of humification degree and oxidative stability of humic acid and is also harmful to the forest soil fertility development.
出处
《水土保持学报》
CSCD
北大核心
2010年第2期232-236,共5页
Journal of Soil and Water Conservation
基金
陇东学院科技创新基金项目(XYZK0705)
关键词
油松林
管理方式
腐殖质
胡敏酸
光学性质
Pinus tabulaeformis forest
management mode
humus
humic acid
optical characteristics
