辽东山区天然次生栎林土壤有机碳含量及其与理化性质的关系

发布时间：2018-02-15 20:30

本文关键词： 辽东山区天然次生林栎林土壤有机碳土壤理化性质　出处：《水土保持学报》2017年04期 　论文类型：期刊论文

【摘要】：通过对设置在辽东山区本溪市草河口镇和庄河市仙人洞镇两个典型天然次生栎林(Quercus spp.)样地内的土样进行分层(0—10,10—20,20—30,30—40cm)采集和室内分析,研究了0—40cm土层土壤有机碳、全氮、全磷等含量的剖面分布特征,探讨了有机碳与理化性质间的关系。结果表明:土壤有机碳及全氮、全磷、全钾、碱解氮、速效磷、速效钾、阳离子交换量的含量均随土层加深而降低,而土壤容重随土层加深而增加,由t检验和方差分析得知,各指标含量在土层间差异均达到5%显著水平;土壤有机碳与粉粒、pH、全氮、全磷、全钾、碱解氮、速效磷、速效钾、阳离子交换量间均呈显著正相关(r=0.430 9~0.919 0,n=44,P0.01),与土壤容重、砂粒间均呈显著负相关(r=0.388 3~0.670 6,n=44,P0.01),而与黏粒间无显著相关性;由逐步回归分析得知土壤碱解氮、碳氮比、全钾、pH、全氮与有机碳间关系最为紧密。土壤有机碳与其他理化性质间关系密切,且以全氮、碱解氮、碳氮比、全钾和pH对其影响最大;同时,各指标均具有明显的剖面分布规律。
[Abstract]:Based on the set in two typical natural secondary Quercus Liaodong mountain area of Benxi city the CAOHEKOU town and Zhuanghe city Xianrendong Zhen Lin (Quercus spp.) in the plots of the soil layer (0 - 10,10 - 20,20 - 30,30 - 40cm) acquisition and analysis indoor, on 0 40cm soil organic carbon and total nitrogen. Profile distribution characteristics of phosphorus content, discusses the relationship between organic carbon and physicochemical properties. The results showed that soil organic carbon and total nitrogen, total phosphorus, total potassium, available nitrogen, available phosphorus, available potassium, cation exchange capacity were decreased with depth, while the soil bulk density with depth increased, informed by t test and analysis of variance, the content of each index difference in soil were significant at 5% level; soil organic carbon powder, pH, total nitrogen, total phosphorus, total potassium, available nitrogen, available phosphorus, available potassium, cation exchange capacity there is a significant positive correlation between r=0.430 (0 9~0.919 n=44, P0.0. 1), and the soil bulk density and sand are negatively correlated (r=0.388, 3~0.670 6, n=44, P0.01), while no significant correlation between grain and clay; by stepwise regression analysis of soil nitrogen, carbon and nitrogen ratio, total potassium, total nitrogen and organic carbon pH, the relationship between soil organic most closely. Carbon and other physicochemical properties are closely related, and the total nitrogen, available nitrogen, carbon and nitrogen ratio, total potassium and pH had the greatest impact; at the same time, the index had a profile distribution law obviously.

【作者单位】：辽宁省森林经营研究所辽宁辽东半岛森林生态系统国家定位观测研究站;
【基金】：林业公益性行业科研专项(201404303) 辽宁辽东半岛森林生态系统国家定位观测研究站运行补助项目(2017-LYPT-DW-024)
【分类号】：S714.2

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