沙地云杉幼苗根表土体中NPK的梯度分布

应用生态学报 ›› 2003, Vol. ›› Issue (12): 2145-2148.

沙地云杉幼苗根表土体中NPK的梯度分布

邹春静^1,2, 韩士杰¹, 徐文铎¹, 谷志静¹

1. 中国科学院沈阳应用生态研究所, 沈阳 110016;
2. 上海交通大学生命科学技术学院, 上海 200030

收稿日期:2003-06-25 修回日期:2003-08-12 出版日期:2003-12-15
通讯作者: 邹春静,男,1968年生,博士,副研究员,主要从事沙地森林生态学和植物生理生态学科研工作,发表论文60余篇和专著2部.Tel:024-83970343,021-54743342,E-mail:zou19680504@163.com.
基金资助:
国家自然科学基金项目(39900019,30070129);中国博士后科学基金资助项目

Gradient distribution of soil N,P,and K along the distance from Picea mongolica seedlings root surface

ZOU Chunjing^1,2, HAN Shijie¹, XU Wenduo¹, GU Zhijing¹

1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
2. College of Life Science and Biotechnology, Shanghai Jiaotong University, Shanghai 200030, China

Received:2003-06-25 Revised:2003-08-12 Online:2003-12-15

摘要/Abstract

摘要： 采用水平根和垂直根两种处理方法对6年生沙地云杉幼苗进行栽培实验.应用分层取样方法对幼苗根表不同距离土体进行取样,并测定不同层次土体中速效N、速效P、速效K的含量.结果表明,在沙地云杉根表不同距离的土体中,速效N、P、K呈现有规律的梯度分布,即在根表近距离土体中营养元素由于根系的吸附作用而含量较高,同时根系生命活动对营养元素的大量消耗又使得营养元素随即出现严重的亏缺区.再向外延伸营养元素含量又逐渐上升而达到土壤本底值.在水平根处理中,由于沙地云杉对N、P、K吸收和利用的强度不同,亏缺区出现的位置不同.速效N和速效K的亏缺区出现在距离根表1cm处;速效P出现在距离根表0.5cm处.在垂直根处理中,速效N、速效P、速效K的梯度变化与水平根处理的相似.速效N和速效K亏缺区出现在距离根表大约1cm处,而速效P在根表附近土壤中的含量始终少于根表远处.说明沙地云杉幼苗对速效P的吸收和利用强度大,速效P可能成为沙地云杉生长发育的限制因子.因此,在沙地云杉引种栽培时,应该选择含P丰富的土壤,或者对林地适当施用一些P肥.

Abstract: Six years old seedlings of Picea mongolica were planted in pots with horizontal and vertical root treatments. Soil samples were stratified collected,and their available nitrogen (N),phosphorus (P),and potassium (K) contents were determined.The results showed that the available contents of N,Pand Kin soils along the distance from Picea mongolica seedlings root surface had a special gradient distribution. Near root surface,there was a depletion zone of soil available N,P,and K,and along the distance from it,the nutrient element contents increased gradually and reached their background values in the bulk soil. In the horizontal root treatment,the depletion zone of soil available N,P,and Kexisted in different distance from root surface,owing to the absorption and the use intensity of the seedlings to these nutrient elements. The depletion zone of soil available Nand Kappeared from 1 cm from root surface,and that of available Pexisted in0.5 cm from root surface. In the vertical root treatment,the depletion zone of available Nand Kalso appeared from 1 cm from root surface as in the horizontal root treatment,but the available Pcontent near root surface was lower than that far away from root surface. It is proved that the absorption and the utilize intensity of soil available Pby Picea mongolica seedlings was intense,which might become a limiting factor to its growth and development. Therefore, Picea mongolica should be planted on soils rich in phosphorus,or Pand Nfertilizers should be applied to improve the absorption and the use efficiency of available Pby Picea mongolica .

中图分类号:

S715.5

邹春静, 韩士杰, 徐文铎, 谷志静. 沙地云杉幼苗根表土体中NPK的梯度分布[J]. 应用生态学报, 2003, (12): 2145-2148.

ZOU Chunjing, HAN Shijie, XU Wenduo, GU Zhijing. Gradient distribution of soil N,P,and K along the distance from Picea mongolica seedlings root surface[J]. Chinese Journal of Applied Ecology, 2003, (12): 2145-2148.

参考文献

[1] Chapin FS. 1980. The mineral nutrition of wild plants. Annu Rev Ecol Syst , 11:233～260
[2] Chen X-H(陈小红),LiX-W(李贤伟),Zhao A-J(赵安玖).2001.Advance in interrelationship between nutrient elements in trees.Sichuan For Designing(四川林业规划),(4):37～38(in Chinese)
[3] China Soil Society(中国土壤学会农业化学专业委员会).1983.Analysis Methods on Soil Agriculture Chemistry. Beijing: Science Press. (in Chinese)
[4] Enriques S. 1993. Patterns in decomposition rates among photosynthetic organisms: The importance of detritus C: N: P content. Oecologia, 94: 457～471
[5] Han S-J(韩士杰),Liao L-P(廖利平),Jiang F-Q(姜凤岐).1998.Considerations on forestinterface ecology.Chin JAppl Ecol(应用生态学报),9(5):538～542(in Chinese)
[6] He C-Q(何池全).2002.Distribution and the corelativety of plant nutrient element in Carex lasiocarpa wetland.Chin J Ecol(生态学杂志),21(1):10～13(in Chinese)
[7] Jiao S-R(焦树仁).1989.Structure and Function of Sand-control Forest Ecosystem in Zhanggutai. Shenyang: Liaoning Science and Technology Press.(in Chinese)
[8] Liu G-Q(刘广全),Tu X-N(土小宁),Shi L-F(史玲芳).2000.Spatial distribution for main nutrient elementsin bole of Norrh-ChinaLarch.Ecol Sci(生态科学),19(4):16～22(in Chinese)
[9] Liu G-Q(刘广全),Zhao S-D(赵士洞),Wang H(王浩),et al.2001.Nutrient distribution for non-photosyntheric organsin the sharp-tooth oak stands.Acta Ecol Sin(生态学报),21(3):422～429 (in Chinese)
[10] Liu WY, John EDF, Zaifu Xu. 2002. Biomass and nutrient accumulation in montane evergreen broad-leaved forest (Lithocarpus xylocarpus type) in Ailao Mountains, SW China. For E col Manag,158:223～235
[11] Luo J(罗辑).1995.Studies on the biocycliing of nutrient elements of three-hardwood forest.Mount Res(山地研究),13(2):103～108 (in Chinese)
[12] Montes N, Bertaudiere-Montes V, Badri W, et al. 2002. Biomass and nutrient content of a semi-arid mountain ecosystem: The Juniperus thurifera L. woodland of Azzaden Valley (Morocco). For Ecol Manag, 166:35～43
[13] Quentin P, Jacques R, Jean-Marc O, et al. 2001. Aboveground biomass and nutrient content of five Douglas-fir stands in France.For Ecol Manag, 142: 109～127
[14] Robert GQ. 2000. Comparison of the behavior of soluble organic and inorganic nutrients in forest soils. For Ecol Manag, 138: 29～50
[15] Song J(宋君),Wang B-S(王伯荪),Peng S-L(彭少麟),et al. 1999. The storage and cycling nutrient of Ixonanthes chinensis in south subtropic broad-leaf evergreen forests, Heishiding Natural Reserve,Guangdong Province.Acta EcolSin(生态学报),19(2):223～225 (in Chinese)
[16] Tyler G, Zohlen A. 1998. Plant seeds as mineral nutrient resource for seedlings-A comparison of plants from calcareous and silicate soils. Anna Bot, 81: 455～459
[17] Xie H-C(谢会成),Yang M-S(杨茂生).2002.The biocycle of Larix principis-ruppechtii forest Plantationin south slope of Qilin Mountains.J Nanjing For Univ(Nat Sci)(南京林业大学学报(自然科学版)),26(5):49～52(in Chinese)
[18] Xu W-D(徐文铎),Zou C-J(邹春静).1998.Sandy Forest Ecoeystem of China. Beijing: China Forestry Press. (in Chinese)