Chemical changes and phosphorus release during decomposition of pea residues in soil

被引:28
作者
Ha, K. V. [1 ]
Marschner, P. [1 ]
Buenemann, E. K. [1 ]
Smernik, Rt [1 ]
机构
[1] Univ Adelaide, Sch Earth & Environm Sci, Adelaide, SA 5005, Australia
关键词
C chemistry; C-13; NMR; decomposition; microbial biomass P; P mineralisation; plant residues; residue-oil interface;
D O I
10.1016/j.soilbio.2007.05.017
中图分类号
S15 [土壤学];
学科分类号
0903 ; 090301 ;
摘要
To study C chemistry and nutrient dynamics in decomposing residues and P dynamics at the residue-soil interface, young pea (Pea-Y) and mature pea (Pea-M) residues were incubated in a sandy soil with low P availability. The study was conducted in microcosms in which the residues were separated from the soil by a nylon mesh. Controls consisted of microcosms without residues. Residues and the soil in the immediate vicinity of the nylon mesh were sampled after 5, 15, 28, 42 and 61 days. Residue chemistry was studied by C-13 nuclear magnetic resonance (NMR) spectroscopy and determination of C, N and P concentrations. Compared to Pea-M, Pea-Y was characterised by higher N and P concentrations, higher percentage of proteins, esters, fatty acids and sugars, and was more easily decomposable in the first 15 days. Pea-M residues had a greater percentage of cellulose and other polysaccharides than Pea-Y and showed a more gradual loss in dry weight. Differences in C chemistry and N and P concentration between the residues decreased with time. The decomposition of Pea-Y and Pea-M residues resulted in an increase in microbial P in the residue-soil interface compared to the control, but available P was increased only in the vicinity of Pea-Y residues. (C) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码:2696 / 2699
页数:4
相关论文
共 11 条
[1]  
Bünemann EK, 2004, SOIL SCI SOC AM J, V68, P1645, DOI 10.2136/sssaj2004.1645
[2]   Carbon mineralisation in soil adjacent to plant residues of contrasting biochemical quality [J].
Gaillard, V ;
Chenu, C ;
Recous, S .
SOIL BIOLOGY & BIOCHEMISTRY, 2003, 35 (01) :93-99
[3]  
Isbell R. F., 1996, The Australian soil classification.
[4]   Organic amendments and phosphorus dynamics .1. Phosphorus chemistry and sorption [J].
Iyamuremye, F ;
Dick, RP ;
Baham, J .
SOIL SCIENCE, 1996, 161 (07) :426-435
[5]   Carbon dynamics determined by natural 13C abundance in microcosm experiments with soils from long-term maize and rye monocultures [J].
John, B ;
Ludwig, B ;
Flessa, H .
SOIL BIOLOGY & BIOCHEMISTRY, 2003, 35 (09) :1193-1202
[6]   PHOSPHORUS CHANGES DURING LEACHING AND DECOMPOSITION OF HAYED-OFF PASTURE PLANTS [J].
JONES, OL ;
BROMFIELD, SM .
AUSTRALIAN JOURNAL OF AGRICULTURAL RESEARCH, 1969, 20 (04) :653-+
[7]   Xylanase, invertase and protease at the soil-litter interface of a loamy sand [J].
Kandeler, E ;
Luxhoi, J ;
Tscherko, D ;
Magid, J .
SOIL BIOLOGY & BIOCHEMISTRY, 1999, 31 (08) :1171-1179
[8]  
Kumar K, 2000, ADV AGRON, V68, P197
[9]  
KUONO K, 1995, SOIL BIOL BIOCHEM, V27, P1353
[10]  
Murphy J., 1962, ANAL CHIM ACTA, V27, P31, DOI [DOI 10.1016/S0003-2670(00)88444-5, 10.1016/S0003-2670]