Plant species and nutritional-mediated control over rhizodeposition and root decomposition

被引:92
作者
Van der Krift, TAJ
Kuikman, PJ
Möller, F
Berendse, F
机构
[1] Univ Wageningen & Res Ctr, Dept Environm Sci, Nat Conservat & Plant Ecol Grp, NL-6708 PD Wageningen, Netherlands
[2] Univ Wageningen & Res Ctr, Dept Water & Environm, Alterra Green World Res, NL-6700 AA Wageningen, Netherlands
关键词
C-labeling; decomposition; grass species; nitrogen-level; rhizodeposition; roots;
D O I
10.1023/A:1004834128220
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
This study focuses on the influence of nitrogen (N) availability and species on rhizodeposition and on decomposition of rhizodeposits, roots and soil organic matter. Four perennial grass species were studied that are characteristic of grassland habitats that differ in nutrient availability. These perennial grass species, Holcus lanatus L., Festuca rubra L., Anthoxanthum odoratum L. and Festuca ovina L., were homogeneously labeled with (CO2)-C-14. Plants were grown on soil without N addition and with N addition (14 g N m(-2)). After 8 weeks, plants were harvested and root production and the remaining amount of rhizodeposits in the soil were measured. C-14-labelled roots were incubated in fresh soil. Decomposition was measured of 1) the labeled rhizodeposits in the soil in which the plants had been growing and 2) the labeled dead roots incubated in fresh soil, by trapping the evolved (CO2)-C-14, over 69 days. In general, decomposability of both roots and rhizodeposits increased when nitrogen availability increased. Moreover, the species differed in their response to N. Higher N supply increased total rhizodeposition of H. lanatus and the decomposability of rhizodeposited carbon compounds of this high fertility species was greater than of the low fertility species F. ovina, but lower than of A. odoratum. The presented study gives no evidence for a relation between root decomposition rate and the nutrient availability of the habitat of the four species. Overall, we suggest on the basis of the results that species can affect nutrient cycling by differences in rates of rhizodeposition and litter production. This offers a mechanism whereby species can influence species replacement during succession.
引用
收藏
页码:191 / 200
页数:10
相关论文
共 44 条
[31]   Carbon and nitrogen allocation in Lolium perenne in response to elevated atmospheric CO2 with emphasis on soil carbon dynamics [J].
vanGinkel, JH ;
Gorissen, A ;
vanVeen, JA .
PLANT AND SOIL, 1997, 188 (02) :299-308
[32]  
vanVeen JA, 1993, TRENDS IN MICROBIAL ECOLOGY, P239
[33]   CHANGES IN SOIL ORGANIC-MATTER AND NET NITROGEN MINERALIZATION IN HEATHLAND SOILS, AFTER REMOVAL, ADDITION OR REPLACEMENT OF LITTER FROM ERICA-TETRALIX OR MOLINIA-CAERULEA [J].
VANVUUREN, MMI ;
BERENDSE, F .
BIOLOGY AND FERTILITY OF SOILS, 1993, 15 (04) :268-274
[34]   NITROGEN MINERALIZATION IN HEATHLAND ECOSYSTEMS DOMINATED BY DIFFERENT PLANT-SPECIES [J].
VANVUUREN, MMI ;
AERTS, R ;
BERENDSE, F ;
DEVISSER, W .
BIOGEOCHEMISTRY, 1992, 16 (03) :151-166
[35]  
Vaughan D., 1996, APPL SOIL ECOL, V5, P29, DOI DOI 10.1016/S0929-1393(96)00126-6
[36]   INTERACTIONS BETWEEN INDIVIDUAL PLANT-SPECIES AND SOIL NUTRIENT STATUS IN SHORTGRASS STEPPE [J].
VINTON, MA ;
BURKE, IC .
ECOLOGY, 1995, 76 (04) :1116-1133
[37]   BIOLOGICAL INVASION BY MYRICA-FAYA ALTERS ECOSYSTEM DEVELOPMENT IN HAWAII [J].
VITOUSEK, PM ;
WALKER, LR ;
WHITEAKER, LD ;
MUELLERDOMBOIS, D ;
MATSON, PA .
SCIENCE, 1987, 238 (4828) :802-804
[38]   LITTER DECOMPOSITION ON THE MAUNA-LOA ENVIRONMENTAL MATRIX, HAWAII - PATTERNS, MECHANISMS, AND MODELS [J].
VITOUSEK, PM ;
TURNER, DR ;
PARTON, WJ ;
SANFORD, RL .
ECOLOGY, 1994, 75 (02) :418-429
[39]   Biodiversity and plant litter: Experimental evidence which does not support the view that enhanced species richness improves ecosystem function [J].
Wardle, DA ;
Bonner, KI ;
Nicholson, KS .
OIKOS, 1997, 79 (02) :247-258
[40]   Can comparative approaches based on plant ecophysiological traits predict the nature of biotic interactions and individual plant species effects in ecosystems? [J].
Wardle, DA ;
Barker, GM ;
Bonner, KI ;
Nicholson, KS .
JOURNAL OF ECOLOGY, 1998, 86 (03) :405-420