厚荚相思N、P内吸收率及其化学计量特征
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摘要
以福州滨海沙地厚荚相思人工林为研究对象,分析比较不同林龄(5年生、9年生)厚荚相思鲜叶、凋落叶和表层土壤(0～20 cm)的N、P浓度、内吸收率及N∶P化学计量特征。结果表明:不同年龄厚荚相思鲜叶N、P含量分别为14.26～19.68 mg·g~(-1)、0.66～0.88 mg·g~(-1);凋落叶N、P含量分别为11.58～12.69 mg·g~(-1)、0.32 mg·g~(-1);土壤全N、全P含量分别为0.13～0.23 mg·g~(-1)、0.19～0.25 mg·g~(-1)。鲜叶N、P含量显著高于土壤。不同林龄间鲜叶和土壤的N、P浓度差异极显著(P<0.01),鲜叶、凋落叶、土壤的N∶P值在不同林龄间差异显著(P<0.05),N∶P值大小排序为凋落叶>鲜叶>土壤。厚荚相思N、P内吸收率分别为27.16%、58.08%,且鲜叶平均N∶P为22.88。表明该地区厚荚相思的生长可能受到P的限制,研究结果可为沿海沙地人工林的经营和管理提供参考。
Taking Acacia crassicarpa plantations as the research objects on a sandy coastal plain area in Fuzhou,Fujian,China.Analyzed and compared the nitrogen(N)and phosphorus(P)concentrations of fresh leaves,litter leaves,and surface soil(0～20 cm),and N∶P stotichiometric,and resorption efficiency at the different forest ages(five-and nine-year-old),respectively.The results showed that the content of N and P were 14.26 to 19.68 mg·g~(-1),0.66 to 0.88 mg·g~(-1) in fresh leaves,were 11.58 to 12.69 mg·g~(-1) and about 0.32 mg·g~(-1) in leaves litter,and were 0.13 to 0.23 mg·g~(-1),0.19 to 0.25 mg g~(-1) in surface soil,respectively.The content of N and P in fresh leaves was significantly higher than those in the soil.The differences in N and P contents in leaves and in soil were very significant between different ages(P<0.01).The N∶P ratios were in the order of litter>leaves>soil,and there were significantly different between different forest ages(P<0.05).The N and P resorption efficiency were 27.16% and 58.08%,respectively,and their mean value of N∶P ratios in leaves was 22.88.The data showed that A.crassicarpa plantation was mainly restricted by P,which may provide a theoretical basis for plantation management in a sandy coastal plain area.
Taking Acacia crassicarpa plantations as the research objects on a sandy coastal plain area in Fuzhou,Fujian,China.Analyzed and compared the nitrogen(N)and phosphorus(P)concentrations of fresh leaves,litter leaves,and surface soil(0～20 cm),and N∶P stotichiometric,and resorption efficiency at the different forest ages(five-and nine-year-old),respectively.The results showed that the content of N and P were 14.26 to 19.68 mg·g~(-1),0.66 to 0.88 mg·g~(-1) in fresh leaves,were 11.58 to 12.69 mg·g~(-1) and about 0.32 mg·g~(-1) in leaves litter,and were 0.13 to 0.23 mg·g~(-1),0.19 to 0.25 mg g~(-1) in surface soil,respectively.The content of N and P in fresh leaves was significantly higher than those in the soil.The differences in N and P contents in leaves and in soil were very significant between different ages(P<0.01).The N∶P ratios were in the order of litter>leaves>soil,and there were significantly different between different forest ages(P<0.05).The N and P resorption efficiency were 27.16% and 58.08%,respectively,and their mean value of N∶P ratios in leaves was 22.88.The data showed that A.crassicarpa plantation was mainly restricted by P,which may provide a theoretical basis for plantation management in a sandy coastal plain area.
引文
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[24]邱岭军,何宗明,胡欢甜,等.滨海沙地不同树种碳氮磷化学计量特征[J].应用与环境生物学报,2017,23(3):555-559.
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[27]姜沛沛,曹扬,陈云明,等.陕西省3种主要树种叶片、凋落物和土壤N、P化学计量特征[J].生态学报,2017,37(2):443-454.
[28]王维奇,徐玲琳,曾从盛,等.河口湿地植物活体-枯落物-土壤的碳氮磷生态化学计量特征[J].生态学报,2011,31(23):7119-7124.
[29]邓浩俊,陈爱民,严思维,等.不同林龄新银合欢重吸收率及其C∶N∶P化学计量特征[J].应用与环境生物学报,2015,21(3):522-527.
[30]安卓,牛得草,文海燕,等.氮素添加对黄土高原典型草原长芒草氮磷钾重吸收率及C∶N∶P化学计量特征的影响[J].植物生态学报,2011,35(8):801-807.
[2]Aerts R.Nutrient resorption from senescing leaves of perennials:are there general patterns[J].Journal of Ecology,1996,84(4):597-608.
[3]Aerts R,Peijl M J V D.A simple model to explain the dominance of low-productive perennials in nutrient-poor habitats[J].Oikos,1993,66(1):144-147.
[4]Berg B.Nutrient release from litter and humus in coniferous forest soils —a mini review [J].Scandinavian Journal of Forest Research,1986,1(1-4):359-369.
[5]Liang D F,Zhang J J,Zhang S T.Patterns of nitrogen resorption in functional groups in a Tibetan alpine meadow [J].Folia Geobotanica,2015,50(3):267-274.
[6]Reed S C,Townsend A R,Davidson E A,et al.Stoichiometric patterns in foliar nutrient resorption across multiple scales[J].New Phytologist,2012,196(1):173-180.
[7]高志红,张万里,张庆费.森林凋落物生态功能研究概况及展望[J].东北林业大学学报,2004,32(6):79-80,83.
[8]Elser J J,Sterner R W,Gorokhova E,et al.Biological stoichiometry from genes to ecosystems [J].Ecology Letters,2000,3(6):540-550.
[9]王绍强,于贵瑞.生态系统碳氮磷元素的生态化学计量学特征[J].生态学报,2008,28(8):3937-3947.
[10]章广琦,张萍,陈云明,等.黄土丘陵区刺槐与油松人工林生态系统生态化学计量特征[J].生态学报,2018,38(4):1328-1336.
[11]Niklas K J.Plant allometry,leaf nitrogen and phosphorus stoichiometry,and interspecific trends in annual growth rates[J].Annals of Botany,2006,97(2):155-163.
[12]Tessier J T,Raynal D J.Use of nitrogen to phosphorus ratios in plant tissue as an indicator of nutrient limitation and nitrogen saturation [J].Journal of Applied Ecology,2003,40(3):523-534.
[13]林宇,邱岭军,林思祖,等.滨海沙地3种人工林表层土壤微生物量及其影响因素[J].东北林业大学学报,2017,45(5):85-90.
[14]苏波,韩兴国,黄建辉,等.植物的养分利用效率(NUE)及植物对养分胁迫环境的适应策略[J].生态学报,2000,20(2):335-343.
[15]Güsewell S.N:P ratios in terrestrial plants:Variation and functional significance[J].New Phytologist,2004,164(2):243-266.
[16]Han W X,Fang J Y,Guo D L,et al.Leaf nitrogen and phosphorus stoichiometry across 753 terrestrial plant species in China [J].New Phytologist,2005(168):377-385.
[17]邱岭军,胡欢甜,林宇,等.滨海沙地不同林龄尾巨桉内吸收率及其C∶N∶P化学计量特征[J].应用与环境生物学报,2017,23(4):739-744.
[18]林勇明,崔鹏,葛永刚,等.泥石流频发区人工恢复新银合欢林种内竞争——以云南东川蒋家沟流域为例[J].北京林业大学学报,2008,30(3):13-17.
[19]曾德慧,陈广生,陈伏生,等.不同林龄樟子松叶片养分含量及其再吸收效率[J].林业科学,2005,41(5):21-27.
[20]理永霞,茶正早,罗微,等.3种桉树幼苗叶片养分变化及其转移特性[J].林业科学,2009,45(1):152-157.
[21]李钦禄,莫其锋,王法明,等.华南热带沿海不同林龄木麻黄人工林养分利用特征[J].应用与环境生物学报,2015,21(1):139-146.
[22]Leonardus V,Stefano M,Amilcare P,et al.Global resorption efficiencies and concentrations of carbon and nutrients in leaves of terrestrial plants [J].Ecological Monographs,2012,82(2):205-220.
[23]宁秋蕊,李守中,姜良超,等.植物叶片再吸收特征及其影响因子[J].应用与环境生物学报,2017,23(5):811-817.
[24]邱岭军,何宗明,胡欢甜,等.滨海沙地不同树种碳氮磷化学计量特征[J].应用与环境生物学报,2017,23(3):555-559.
[25]Stock W D,Verboom G A.Phylogenetic ecology of foliar N and P concentrations and N∶P ratios across Mediterranean-type ecosystems [J].Global Ecology and Biogeography,2012,21(12):1147-1156.
[26]周丽,张卫强,唐洪辉,等.南亚热带中幼龄针阔混交林生态化学计量特征[J].生态环境学报,2014,23(11):1732-1738.
[27]姜沛沛,曹扬,陈云明,等.陕西省3种主要树种叶片、凋落物和土壤N、P化学计量特征[J].生态学报,2017,37(2):443-454.
[28]王维奇,徐玲琳,曾从盛,等.河口湿地植物活体-枯落物-土壤的碳氮磷生态化学计量特征[J].生态学报,2011,31(23):7119-7124.
[29]邓浩俊,陈爱民,严思维,等.不同林龄新银合欢重吸收率及其C∶N∶P化学计量特征[J].应用与环境生物学报,2015,21(3):522-527.
[30]安卓,牛得草,文海燕,等.氮素添加对黄土高原典型草原长芒草氮磷钾重吸收率及C∶N∶P化学计量特征的影响[J].植物生态学报,2011,35(8):801-807.