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张星星,杨柳明,陈忠,李一清,林燕语,郑宪志,楚海燕,杨玉盛.中亚热带不同母质和森林类型土壤生态酶化学计量特征.生态学报,2018,(16).http://dx.doi.org/10.5846/stxb201708181492  
中亚热带不同母质和森林类型土壤生态酶化学计量特征
Patterns of ecoenzymatic stoichiometry on types of forest soils form different parent materials in subtropical areas
投稿时间:2017-08-18  修订日期:2018-03-30
DOI: 10.5846/stxb201708181492
关键词母质  森林类型  土壤生态酶化学计量  土壤酶活性  土壤养分
Key Wordsparent material  forest type  soil ecoenzymatic stoichiometry  soil enzyme activity  soil nutrient
基金项目国家自然科学基金(31300523,31600433)
作者单位E-mail
张星星 福建师范大学地理科学学院 1601217759@qq.com 
杨柳明 福建师范大学地理科学学院 yanglm2007@aliyun.com 
陈忠 福建师范大学地理科学学院  
李一清 福建师范大学地理科学学院  
林燕语 福建师范大学地理科学学院  
郑宪志 福建师范大学地理科学学院  
楚海燕 福建师范大学地理科学学院  
杨玉盛 福建师范大学地理科学学院  
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摘要:
土壤生态酶化学计量比作为衡量土壤微生物能量和养分资源限制状况的重要指标,是当前生态学领域研究的热点之一,然而关于土壤母质和森林类型在调控土壤生态酶化学计量比中所扮演的角色及作用机制尚不明确。分别以砂岩和花岗岩发育的米槠林和杉木林土壤为研究对象,通过测定土壤物理化学性质、微生物量碳、氮和磷及土壤酶活性,探讨不同母岩发育的米槠林和杉木林土壤生态酶化学计量特征。结果显示,花岗岩发育的土壤酸性磷酸酶活性(AP)显著高于砂岩发育的土壤,βG:AP和NAG:AP的值显著低于砂岩发育的土壤。其中,花岗岩发育的米槠林土壤βG:AP和NAG:AP的值都显著高于杉木林,砂岩发育的土壤βG:AP和NAG:AP的值在两个林分间呈相反的结果。结果表明土壤生态酶化学计量比能够反映不同森林土壤之间磷养分限制强度,花岗岩比砂岩土壤受磷养分限制更严重。相关分析表明,土壤酶活性及生态酶化学计量比与土壤生物因子和非生物因子密切相关,而冗余分析发现土壤pH、总磷(TP)和微生物量碳(MBC)分别解释土壤酶活性和生态酶化学计量比变异的56.9%、27.9%和12.3%。未来森林经营及管理应考虑土壤母质和森林类型差异对区域森林土壤养分循环的影响。
Abstract:
The stoichiometry of ecoenzymatic activity can be used as an important indicator to measure the energy of soil microbes and soil nutrient resource constraints, and is one of the hotspot issues in the field of ecology. However, the role and mechanism of soil parent material and forest types in regulating the stoichiometry of ecoenzymatic activity is uncertain. In this study, we investigated the variations in soil properties, microbial biomass carbon, nitrogen, phosphorus, and soil enzyme activity in the soils of a Castanopsis carlesii and Cunninghamia lanceolata forest developed from two kinds of parent materials (sandstone and granite). These study sites were expected to reveal the patterns of ecoenzymatic stoichiometry on two types of forest soils developed from different parent materials in subtropical areas. The results showed that soil acid phosphatase activity (AP) was significantly higher in granite plots than in sandstone plots, and the values of βG:AP and NAG:AP in granite plots were significant lower than that of sandstone plots. In granite plots, the values of βG:AP and NAG:AP were significantly higher in Castanopsis carlesii forest than Cunninghamia lanceolata forest, and in sandstone the values of βG:AP and NAG:AP were significant higher in Cunninghamia lanceolata forest than Castanopsis carlesii forest. In addition, the correlation analysis suggested that soil enzyme activity and the stoichiometry of ecoenzymatic activity were controlled by soil abiotic factors and biotic factors, and redundancy analysis (RDA) showed that soil pH, total phosphorus (TP), and microbial biomass carbon (MBC) accounted for the variation in soil enzyme activity and ecoenzymatic stoichiometry by 56.9%, 27.9%, and 12.3%, respectively. In summary, the ecoenzymatic stoichiometry could reflect the limitation of phosphorus in different forests, and they were more serious in granite than in sandstone. Thus, we suggested that the soil parent material and forest type should be considered as the important factors in forest management in the future.
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