Soil gross nitrogen transformations are related to land-uses in two agroforestry systems

被引:30
作者
Lang, Man [1 ,2 ,3 ]
Li, Ping [1 ,2 ,3 ]
Ti, Chaopu [3 ]
Zhu, Shixi [4 ]
Yan, Xiaoyuan [3 ]
Chang, Scott X. [2 ,3 ]
机构
[1] Nanjing Univ Informat Sci & Technol, Jiangsu Key Lab Agr Meteorol, Nanjing 210044, Jiangsu, Peoples R China
[2] Univ Alberta, Dept Renewable Resources, Edmonton, AB T6G 2E3, Canada
[3] Chinese Acad Sci, State Key Lab Soil & Sustainable Agr, Inst Soil Sci, Nanjing 210008, Jiangsu, Peoples R China
[4] Guizhou Minzu Univ, Sch Ecoenvironm Engn, Guiyang 550025, Guizhou, Peoples R China
基金
中国国家自然科学基金;
关键词
Gross nitrogen transformation; N-15 dilution technique; Land-use type; Hedgerow; Shelterbelt; N-15 POOL DILUTION; CENTRAL ALBERTA; BACTERIAL COMMUNITIES; MINERALIZATION RATES; CARBON SEQUESTRATION; GRASSLAND SOILS; ORGANIC-MATTER; N2O EMISSIONS; NITRIFICATION; FOREST;
D O I
10.1016/j.ecoleng.2018.12.022
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
A better understanding of gross nitrogen (N) transformation rates in agroforestry systems is crucial for testing the land use management effects on soil N retention. In this study, gross N transformation rates in forest and adjacent agricultural soils in two agroforestry systems, hedgerow and shelterbelt, located near Edmonton, Alberta, Canada were investigated using the N-15 labeled technique and a numerical model, FLUAZ. Gross N mineralization rates in the forested land use were higher than that in the agricultural land use for hedgerow and shelterbelt agroforestry system, and the pattern was the same for gross N immobilization rates. However, gross nitrification rates in the forested land use were lower than that in the agricultural land use for both agroforestry systems. The ratios of gross nitrification to ammonium immobilization rates and the ratios of gross N mineralization to immobilization rates in the agricultural land use were higher than that in the forested land use irrespective of the type of agroforestry system studied. Our study suggested that the agricultural land use had a lower potential to conserve N, posing a higher risk of N loss, whereas mineralization and immobilization processes were tightly coupled in the forested land use, leaving less N available for nitrification and subsequent N loss to the environment.
引用
收藏
页码:431 / 439
页数:9
相关论文
共 55 条
  • [11] RELATIONSHIPS BETWEEN DENITRIFICATION CAPACITIES OF SOILS AND TOTAL, WATER-SOLUBLE AND READILY DECOMPOSABLE SOIL ORGANIC-MATTER
    BURFORD, JR
    BREMNER, JM
    [J]. SOIL BIOLOGY & BIOCHEMISTRY, 1975, 7 (06) : 389 - 394
  • [12] Seasonal trends in selected soil biochemical attributes: Effects of crop rotation in the semiarid prairie
    Campbell, CA
    Biederbeck, VO
    Wen, G
    Zentner, RP
    Schoenau, J
    Hahn, D
    [J]. CANADIAN JOURNAL OF SOIL SCIENCE, 1999, 79 (01) : 73 - 84
  • [13] Low nitrogen use efficiency and high nitrate leaching in a highly fertilized Coffea arabica-Inga densiflora agroforestry system: a 15N labeled fertilizer study
    Cannavo, P.
    Harmand, J. -M.
    Zeller, B.
    Vaast, P.
    Ramirez, J. E.
    Dambrine, E.
    [J]. NUTRIENT CYCLING IN AGROECOSYSTEMS, 2013, 95 (03) : 377 - 394
  • [14] Soil pH has contrasting effects on gross and net nitrogen mineralizations in adjacent forest and grassland soils in central Alberta, Canada
    Cheng, Yi
    Wang, Jing
    Mary, Bruno
    Zhang, Jin-bo
    Cai, Zu-cong
    Chang, Scott X.
    [J]. SOIL BIOLOGY & BIOCHEMISTRY, 2013, 57 : 848 - 857
  • [15] Soil nitrogen transformations and the role of light fraction organic matter in forest soils
    Compton, JE
    Boone, RD
    [J]. SOIL BIOLOGY & BIOCHEMISTRY, 2002, 34 (07) : 933 - 943
  • [16] Controls on soil nitrogen cycling and microbial community composition across land use and incubation temperature
    Cookson, W. R.
    Osman, M.
    Marschner, P.
    Abaye, D. A.
    Clark, I.
    Murphy, D. V.
    Stockdale, E. A.
    Watson, C. A.
    [J]. SOIL BIOLOGY & BIOCHEMISTRY, 2007, 39 (03) : 744 - 756
  • [17] INTERNAL CYCLING OF NITRATE IN SOILS OF A MATURE CONIFEROUS FOREST
    DAVIDSON, EA
    HART, SC
    FIRESTONE, MK
    [J]. ECOLOGY, 1992, 73 (04) : 1148 - 1156
  • [18] Nitrification in acid soils: micro-organisms and mechanisms
    De Boer, W
    Kowalchuk, GA
    [J]. SOIL BIOLOGY & BIOCHEMISTRY, 2001, 33 (7-8) : 853 - 866
  • [19] Environment Canada, 2012, ALB WEATH COND
  • [20] Long-term impact of fertilization on activity and composition of bacterial communities and metabolic guilds in agricultural soil
    Enwall, Karin
    Nyberg, Karin
    Bertilsson, Stefan
    Cederlund, Harald
    Stenstrom, John
    Hallin, Sara
    [J]. SOIL BIOLOGY & BIOCHEMISTRY, 2007, 39 (01) : 106 - 115