Effects of plant species on phosphorus availability in a range of grassland soils

被引:47
作者
Chen, CR [1 ]
Condron, LM
Sinaj, S
Davis, MR
Sherlock, RR
Frossard, E
机构
[1] Lincoln Univ, Soil Plant & Ecol Sci Div, Canterbury, New Zealand
[2] Swiss Fed Inst Technol Zurich ETHZ, Inst Plant Sci, CH-8315 Eschikon Lindau, Switzerland
[3] New Zealand Forest Res Inst, Christchurch, New Zealand
[4] Griffith Univ, Fac Environm Sci, Cooperat Res Ctr Sustainable Prod Energy, Nathan, Qld 4111, Australia
关键词
isotopic exchange kinetics; Lolium perenne; P-33; phosphorus uptake; Pinus radiata; root phosphatase activity; soil phosphorus availability;
D O I
10.1023/A:1026273529177
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
Vegetative conversion from grass to forest may influence soil nutrient dynamics and availability. A short-term ( 40 weeks) glasshouse experiment was carried out to investigate the impacts of ryegrass ( Lolium perenne) and radiata pine ( Pinus radiata) on soil phosphorus ( P) availability in 15 grassland soils collected across New Zealand using P-33 isotopic exchange kinetics (IEK) and chemical extraction methods. Results from this study showed that radiata pine took up more P (4.5 - 33.5 mg P pot(-1)) than ryegrass (1.1 - 15.6 mg pot(-1)) from the soil except in the Temuka soil in which the level of available P (e.g., E-1min P-i, bicarbonate extractable P-i) was very high. Radiata pine tended to be better able to access different forms of soil P, compared with ryegrass. There were no significant differences in the level of water soluble P (Cp, intensity factor) between soils under ryegrass and radiata pine, but the levels of Cp were generally lower compared with original soils due to plant uptake. The growth of both ryegrass and radiata pine resulted in the redistribution of soil P from the slowly exchangeable P-i pool ( E->10m P-i, reduced by 31.8% on the average) to the rapidly exchangeable P-i ( E1min- 1d P-i, E1d- 10m P-i) pools in most soils. The values of R/r(1) ( the capacity factor) were also generally greater in most soils under radiata pine compared with ryegrass. Specific P mineralisation rates were significantly greater for soils under radiata pine (8.4 - 21.9%) compared with ryegrass (0.5 - 10.8%), indicating that the growth of radiata pine enhanced mineralisation of soil organic P. This may partly be ascribed to greater root phosphatase activity for radiata pine than for ryegrass. Plant species x soil type interactions for most soil variables measured indicate that the impacts of plant species on soil P dynamics was strongly influenced by soil properties.
引用
收藏
页码:115 / 130
页数:16
相关论文
共 43 条
[1]  
ALEXANDER I J, 1981, Soil Biology and Biochemistry, V13, P301, DOI 10.1016/0038-0717(81)90066-3
[2]  
[Anonymous], PHOSPHORUS GLOBAL EN
[3]  
[Anonymous], 1996, PLANT ROOTS HIDDEN H
[4]   PHOSPHATASE-ACTIVITIES AND PHOSPHORUS UPTAKE FROM INOSITOL PHOSPHATE BY ECTOMYCORRHIZAL FUNGI [J].
ANTIBUS, RK ;
SINSABAUGH, RL ;
LINKINS, AE .
CANADIAN JOURNAL OF BOTANY-REVUE CANADIENNE DE BOTANIQUE, 1992, 70 (04) :794-801
[5]   NUTRIENT CYCLING IN FORESTS [J].
ATTIWILL, PM ;
ADAMS, MA .
NEW PHYTOLOGIST, 1993, 124 (04) :561-582
[6]  
Beckett PHT., 1964, PLANT SOIL, P253, DOI DOI 10.1007/BF01377744
[7]   Effects of afforestation on phosphorus dynamics and biological properties in a New Zealand grassland soil [J].
Chen, CR ;
Condron, LM ;
Davis, MR ;
Sherlock, RR .
PLANT AND SOIL, 2000, 220 (1-2) :151-163
[8]   Characterization of phosphorus availability in selected New Zealand grassland soils [J].
Chen, CR ;
Sinaj, S ;
Condron, LM ;
Frossard, E ;
Sherlock, RR ;
Davis, MR .
NUTRIENT CYCLING IN AGROECOSYSTEMS, 2003, 65 (01) :89-100
[9]  
CHUCHOU M, 1990, SOIL BIOL BIOCHEM, V22, P959
[10]   Influence of conifers on the forms of phosphorus in selected New Zealand grassland soils [J].
Condron, LM ;
Davis, MR ;
Newman, RH ;
Cornforth, IS .
BIOLOGY AND FERTILITY OF SOILS, 1996, 21 (1-2) :37-42