%0 Journal Article
%A and HE Wei-Ming*
%A SHEN Yan
%A YANG Hui-Ling
%T Nutrient availability in habitats affects carbon and nitrogen releases of litter in winter wheat
%D 2010
%R 10.3773/j.issn.1005-264x.2010.05.003
%J Chinese Journal of Plant Ecology
%P 498-504
%V 34
%N 5
%X *Aims* Our objective is to test whether C and N releases in winter wheat (*Triticum aestivum*) litter change monotonically or unimodally with soil nutrients in its habitats.

*Methods* We conducted a growth experiment where winter wheat was subjected to 6-level nutrient regimes and a common garden decomposition experiment. We determined initial C:N ratios of live tissues, biomass loss of litters, C:N ratios of remaining litter, and the amounts of C and N releases. We analyzed correlations between initial C:N ratios and C/N release or between C:N ratios. All data were analyzed with SPSS 13.0 and R 2.9.1.

*Important findings* Litterfall, initial leaf/root C:N ratios, C:N ratios of remaining litter, and C and N releases changed monotonically along a soil nutrient gradient. Soil nutrients had significant effects on biomass loss of leaves, but not of roots. There were negative correlations between initial leaf/root C:N ratios and C and N releases. Initial leaf/root C:N ratios were strongly and positively correlated with C:N ratios of remaining litter. These findings suggest that (1) increased soil nutrients surrounding winter wheat plants enhance C and N return in litter, thereby being beneficial to its growth, (2) C:N ratios indicate the potential amounts of C and N releases, and (3) decomposition processes decrease C:N ratios in remaining litter.
%U http://www.plant-ecology.com/EN/10.3773/j.issn.1005-264x.2010.05.003