摘要
以正交试验好气培养土壤方法分析了祁连山青海云杉林和高寒草甸下土壤N矿化及其与温度、湿度、土层和海拔的关系。结果显示:以土壤N矿化量极差计,土层和温、湿度交互作用对土壤N矿化影响最大,其次是温度,湿度影响较小;以土壤N矿化比例极差计,温度和温、湿度交互作用对土壤N矿化影响最大,其次是湿度,土层影响较小。温度和温、湿度交互作用对土壤N矿化量影响显著,对土壤N矿化比例影响却不显著(P<0.05)。35℃下土壤N矿化量比5℃和15℃下高,而25℃与5℃和15℃下差异不显著;35℃下土壤N矿化比例比15℃下高,15℃与5℃和25℃差异不显著(P<0.05)。不同湿度下土壤N矿化量差异不显著,土壤含水量为20%时土壤N矿化比例比60%时低(P<0.05)。海拔高度3200 m处森林土壤N矿化量比3 500 m处高寒灌丛草甸土壤中低(P<0.05),3600 m与3400 m、3200 m及3500 m与3600 m差异却不显著(P<0.05)。0~15 cm土层土壤N矿化量比15~35 cm土层高,但两个土层土壤N矿化比例差异不显著(P<0.05)。Q10在0.7~2.0,5℃升高到15℃较低,15℃升高到25℃及25℃...
To understand the effects of varying soil temperature and changing in soil water content on the decomposition of soil nitrogen,an anaerobic incubation experiment with orthogonal experiment in an artificial climatic chamber was conducted to investigate how the mineralization of soil nitrogen of the slopes under the Qilian Mountains forest(dominated by Picea crassifolia) and alpine meadows were affected by temperature,soil water content,soil depth,and mountain altitudes.The results showed that based on the ra...
出处
《林业科学研究》
CSCD
北大核心
2008年第2期161-167,共7页
Forest Research
基金
国家自然科学基金项目资助(40543014)
关键词
祁连山
土壤N矿化
山地森林
高寒草甸
Qilian Mountains
mineralization of soil nitrogen
mountain forest
alpine meadows
