Effects of nitrogen fertilization on soil nitrogen pools and microbial properties in a hoop pine (Araucaria cunninghamii) plantation in southeast Queensland, Australia

被引:38
作者
Chen, CR [1 ]
Xu, ZH
Hughes, JM
机构
[1] Griffith Univ, Cooperat Res Ctr Sustainable Prod Forestry, Nathan, Qld 4111, Australia
[2] Griffith Univ, Fac Environm Sci, Nathan, Qld 4111, Australia
[3] Queensland Forestry Res Inst, Indooroopilly, Qld 4068, Australia
关键词
Araucaria cunninghamii; nitrogen fertilization; soil nitrogen pools; microbial biomass; nitrogen-15;
D O I
10.1007/s00374-002-0532-y
中图分类号
S15 [土壤学];
学科分类号
0903 ; 090301 ;
摘要
A field study was conducted to investigate the effects of N fertilization on soil N pools and associated microbial properties in a 13-year-old hoop pine (Araucaria cunninghamii) plantation of southeast Queensland, Australia. The treatments included: (1) control (without N application); (2) 300 kg N ha(-1) applied as NH4NO3; and (3) 600 kg N ha(-1) as NH4NO3. The experiment employed a randomized complete block design with four replicates. Soil samples were taken approximately 5 years after the N application. The results showed that application of 600 kg N ha(-1) significantly increased concentrations of NH4+-N in 0-10 cm soil compared with the control and application of 300 kg N ha(-1). Concentrations of NO3--N in soil (both 0-10 cm and 10-20 cm) with an application rate of 600 kg N ha(-1) were significantly higher compared with the control. Application of 600 kg N ha(-1) significantly increased gross N mineralization and immobilization rates (0-10 cm soil) determined by N-15 isotope dilution techniques under anaerobic incubation, compared with the control. However, N application did not significantly affect the concentrations of soil total C and total N. N application appeared to decrease microbial biomass C and N and respiration, and to increase the metabolic quotient (qCO(2)) in 0-10 cm soil, but these effects were not statistically significant. The lack of statistical significance in these microbial properties between the treatments might have been associated with large spatial variability between the replicate plots at this experimental site. Spatial variability in soil microbial biomass C and N was found to relate to soil moisture, total C and total N.
引用
收藏
页码:276 / 283
页数:8
相关论文
共 38 条
[1]   Changes in enzyme activities and microbial biomass of tallgrass prairie soil as related to burning and nitrogen fertilization [J].
Ajwa, HA ;
Dell, CJ ;
Rice, CW .
SOIL BIOLOGY & BIOCHEMISTRY, 1999, 31 (05) :769-777
[2]  
BARTHA RICHARD, 1965, SOIL SCI, V100, P68, DOI 10.1097/00010694-196507000-00011
[3]   Effects of tree species, stand age and soil type on soil microbial biomass and its activity in a southern boreal forest [J].
Bauhus, J ;
Pare, D ;
Cote, L .
SOIL BIOLOGY & BIOCHEMISTRY, 1998, 30 (8-9) :1077-1089
[4]   CHLOROFORM FUMIGATION AND THE RELEASE OF SOIL-NITROGEN - THE EFFECTS OF FUMIGATION TIME AND TEMPERATURE [J].
BROOKES, PC ;
KRAGT, JF ;
POWLSON, DS ;
JENKINSON, DS .
SOIL BIOLOGY & BIOCHEMISTRY, 1985, 17 (06) :831-835
[5]   Plot-scale spatial patterns of soil water content, pH, substrate-induced respiration and N mineralization in a temperate coniferous forest [J].
Bruckner, A ;
Kandeler, E ;
Kampichler, C .
GEODERMA, 1999, 93 (3-4) :207-223
[6]  
Bundy LG, 1994, METHODS SOIL ANAL 2, V5, P951, DOI DOI 10.2136/SSSABOOKSER5.2.C41
[7]   ALKALINE PERSULFATE OXIDATION FOR DETERMINING TOTAL NITROGEN IN MICROBIAL BIOMASS EXTRACTS [J].
CABRERA, ML ;
BEARE, MH .
SOIL SCIENCE SOCIETY OF AMERICA JOURNAL, 1993, 57 (04) :1007-1012
[8]   NITROGEN MINERALIZATION IN RELATION TO SITE HISTORY AND SOIL PROPERTIES FOR A RANGE OF AUSTRALIAN FOREST SOILS [J].
CONNELL, MJ ;
RAISON, RJ ;
KHANNA, PK .
BIOLOGY AND FERTILITY OF SOILS, 1995, 20 (04) :213-220
[9]   Spatial and seasonal variation of gross nitrogen transformations and microbial biomass in a Northeastern US grassland [J].
Corre, MD ;
Schnabel, RR ;
Stout, WL .
SOIL BIOLOGY & BIOCHEMISTRY, 2002, 34 (04) :445-457
[10]  
DPI Forestry, 1998, OV QUEENSL FOR IND