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彭建勤,林成芳,洪慧滨,林伟盛,熊德成,杨智榕,杨玉盛.中亚热带森林更新方式对土壤磷素的影响.生态学报,2016,36(24):8015~8024 本文二维码信息
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中亚热带森林更新方式对土壤磷素的影响
Effect of forest regeneration on soil phosphorus in mid-subtropical area
投稿时间:2015-06-07  修订日期:2016-10-17
DOI: 10.5846/stxb201506071150
关键词更新方式  天然林  全磷  有效磷  可溶性有机磷
Key Wordsregeneration method  natural forest  total phosphorus  available phosphorus  dissolved organic phosphorus
基金项目国家自然科学基金面上项目(31270584);国家自然科学基金重点项目(31130013)
作者单位E-mail
彭建勤 福建师范大学地理科学学院, 福州 350007
湿润亚热带山地生态国家重点实验室培育基地, 福州 350007 
 
林成芳 福建师范大学地理科学学院, 福州 350007
湿润亚热带山地生态国家重点实验室培育基地, 福州 350007 
tonylcf99@163.com 
洪慧滨 福建师范大学地理科学学院, 福州 350007
湿润亚热带山地生态国家重点实验室培育基地, 福州 350007 
 
林伟盛 福建师范大学地理科学学院, 福州 350007
湿润亚热带山地生态国家重点实验室培育基地, 福州 350007 
 
熊德成 福建师范大学地理科学学院, 福州 350007
湿润亚热带山地生态国家重点实验室培育基地, 福州 350007 
 
杨智榕 福建师范大学地理科学学院, 福州 350007
湿润亚热带山地生态国家重点实验室培育基地, 福州 350007 
 
杨玉盛 福建师范大学地理科学学院, 福州 350007
湿润亚热带山地生态国家重点实验室培育基地, 福州 350007 
 
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摘要:
为了深入了解磷(P)在中亚热带森林生态系统内的有效性,在三明市梅列区陈大采育场黄坑工区,选择天然林采伐后采取不同更新方式的多种森林,以米槠天然林为对照,研究森林不同更新方式对中亚热带森林土壤全磷、有效磷及可溶性有机磷的影响。结果显示:在0-100 cm土层,(1)土壤全磷平均含量大小顺序依次为米槠天然林(NF)(0.49±0.09)g/kg,米槠轻度干扰人促更新林(LAR)(0.35±0.04)g/kg,米槠强度干扰人促更新林(HAR)(0.34±0.03)g/kg,马尾松人工林(PIM)(0.32±0.02)g/kg,杉木人工林(CUL)(0.3±0.03)g/kg,人促更新林比人工林高,NF显著高于其它的林分(P < 0.05);(2)土壤有效磷(NaHCO3提取)平均含量大小顺序依次为NF(0.41±0.39)mg/kg,LAR(0.26±0.2)mg/kg,HAR(0.23±0.16)mg/kg,PIM(0.17±0.05)mg/kg,CUL(0.13±0.06)mg/kg,NF显著高于其它林分,LAR显著比人工林高(P < 0.05)。(3)在0-10 cm土层,各林分可溶性有机磷含量在夏季最高,冬季最低,温度和降水量的季节变化是影响其重要因子之一;同一季节,人促更新林比人工林高,NF显著高于人工林(P <0.05)。结果表明,全磷、有效磷和可溶性有机磷含量随人为干扰强度的增强呈降低趋势,其与年凋落物量和土壤有机碳储量呈显著正相关,与土壤容重呈显著负相关,全磷和有效磷在土壤剖面呈表聚性特征。相比于人工林经营,采取人促天然更新的方式,更有利于中亚热带森林养分的贮存和转化,有利于森林的长期经营和管理。
Abstract:
To better understand the availability of phosphorus (P) in mid-subtropical forest ecosystems, various forests that originated from natural tree felling were selected in the Huangkeng work area of the Chenda state-owned forestry farm, and the effect of different regeneration patterns on soil total, available, and dissolved organic P were studied. The results indicated that, in the 0-100 cm soil layer, (1) Average soil total P content from highest to lowest was (0.49±0.09) g/kg in the Castanopsis carlesii forest (NF), (0.35±0.04) g/kg in the mild disturbance forest with natural regeneration (LAR), (0.34±0.03) g/kg in the intensive disturbance forest with natural regeneration (HAR), (0.32±0.02) g/kg in the Pinus massoniana plantation (PIM), and (0.3±0.03) g/kg in the Cunninghamia lancealata plantation. Natural regeneration forests had higher total P than plantations, and total P for NF was significantly higher than that of the plantations (P < 0.05). (2) Average soil available P content (NaHCO3 extraction) from highest to lowest was (0.41±0.39) mg/kg for NF, (0.26±0.2) mg/kg for LAR, (0.23±0.16) mg/kg for HAR, (0.17±0.05) mg/kg for PIM, and (0.13±0.06) mg/kg for CUL. Available P of LAR was significantly higher than that of plantations (P < 0.05). (3) In the 0-10 cm soil layer, dissolved organic P content was highest in summer and lowest in winter for every forest type, which was probably caused by seasonal changes in temperature and precipitation. In the same season, dissolved organic P from NF was significantly higher than that of plantations (P < 0.05), and dissolved organic P is natural regeneration forests was higher than in plantations. Correlation analysis showed total P, available P, and dissolved organic P were significantly positively correlated with litterfall and soil organic carbon storage, but had a significant negative correlation with soil bulk density, and exhibited a declining trend with increasing human disturbance. Total P and available P in the soil profile exhibited characteristics of surface accumulation. Compared to plantation management, natural forest regeneration was more conducive to storage and transformation of nutrients, and for the long-term management of the mid-subtropical forests.
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