Chin J Plant Ecol ›› 2011, Vol. 35 ›› Issue (1): 9-16.DOI: 10.3724/SP.J.1258.2011.00009
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CHEN Jin1,2, LI Yang1, HUANG Jian-Hui1,*()
Received:
2010-01-20
Accepted:
2010-09-03
Online:
2011-01-20
Published:
2011-01-24
Contact:
HUANG Jian-Hui
CHEN Jin, LI Yang, HUANG Jian-Hui. Decomposition of mixed litter of four dominant species in an Inner Mongolia steppe[J]. Chin J Plant Ecol, 2011, 35(1): 9-16.
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URL: https://www.plant-ecology.com/EN/10.3724/SP.J.1258.2011.00009
凋落物类型 Litter type | C (%) | N (%) | P (%) | C/N | C/P | N/P |
---|---|---|---|---|---|---|
克氏针茅 Stipa krylovii | 40.75 ± 0.62a | 0.561 ± 0.035a | 0.096 ± 0.003a | 72.12 ± 4.29a | 425.75 ± 16.12a | 5.957 ± 0.285a |
糙叶黄芪 Astragalus scaberrimus | 43.82 ± 0.58b | 2.205 ± 0.023b | 0.159 ± 0.001b | 19.82 ± 0.20b | 275.20 ± 3.73b | 13.884 ± 0.074b |
星毛委陵菜 Potentila acaulis | 42.17 ± 0.51ac | 1.114 ± 0.020c | 0.164 ± 0.001b | 37.58 ± 1.01c | 256.78 ± 4.14b | 6.843 ± 0.115c |
羊草 Leymus chinensis | 43.21 ± 0.30bc | 0.547 ± 0.031a | 0.096 ± 0.006a | 76.00 ± 5.57a | 454.79 ± 27.68a | 6.005 ± 0.097a |
Table 1 Initial chemical composition of single litter
凋落物类型 Litter type | C (%) | N (%) | P (%) | C/N | C/P | N/P |
---|---|---|---|---|---|---|
克氏针茅 Stipa krylovii | 40.75 ± 0.62a | 0.561 ± 0.035a | 0.096 ± 0.003a | 72.12 ± 4.29a | 425.75 ± 16.12a | 5.957 ± 0.285a |
糙叶黄芪 Astragalus scaberrimus | 43.82 ± 0.58b | 2.205 ± 0.023b | 0.159 ± 0.001b | 19.82 ± 0.20b | 275.20 ± 3.73b | 13.884 ± 0.074b |
星毛委陵菜 Potentila acaulis | 42.17 ± 0.51ac | 1.114 ± 0.020c | 0.164 ± 0.001b | 37.58 ± 1.01c | 256.78 ± 4.14b | 6.843 ± 0.115c |
羊草 Leymus chinensis | 43.21 ± 0.30bc | 0.547 ± 0.031a | 0.096 ± 0.006a | 76.00 ± 5.57a | 454.79 ± 27.68a | 6.005 ± 0.097a |
Fig. 1 Single litter decomposition rates and nutrient dynamics during decomposition. LSD method was used in multiple comparisons. Different letters beside the lines mean significant difference at p < 0.05 among species of a specific sampling time.
凋落物混合组合 Litter mixing combinations | 重量剩余率 Mass remaining percentage (%) | 混合效应 Mixing effects | |
---|---|---|---|
实测值 Observed value | 期望值 Expected value | ||
克氏针茅-糙叶黄芪(Sk-As) Stipa krylovii + Astragalus scaberrimus | 66.0 ± 0.7 | 65.9 ± 0.9 | ns |
糙叶黄芪-星毛委陵菜(As-Pa) A. scaberrimus + Potentila acaulis | 67.4 ± 1.1*** | 59.9 ± 0.5 | – |
星毛委陵菜-克氏针茅(Pa-Sk) P. acaulis + S. krylovii | 71.4 ± 1.5 | 73.8 ± 0.7 | ns |
克氏针茅-羊草(Sk-Lc) S. krylovii + Leymus chinensis | 81.6 ± 1.2 | 79.0 ± 0.4 | ns |
克氏针茅-糙叶黄芪-星毛委陵菜(Sk-As-Pa) S. krylovii + A. scaberrimus + P. acaulis | 68.2 ± 0.6*** | 66.5 ± 0.6 | – |
Table 2 Observed and expected mass remaining percentage (%) of different litter mixing combinations (mean ± SE, n = 5)
凋落物混合组合 Litter mixing combinations | 重量剩余率 Mass remaining percentage (%) | 混合效应 Mixing effects | |
---|---|---|---|
实测值 Observed value | 期望值 Expected value | ||
克氏针茅-糙叶黄芪(Sk-As) Stipa krylovii + Astragalus scaberrimus | 66.0 ± 0.7 | 65.9 ± 0.9 | ns |
糙叶黄芪-星毛委陵菜(As-Pa) A. scaberrimus + Potentila acaulis | 67.4 ± 1.1*** | 59.9 ± 0.5 | – |
星毛委陵菜-克氏针茅(Pa-Sk) P. acaulis + S. krylovii | 71.4 ± 1.5 | 73.8 ± 0.7 | ns |
克氏针茅-羊草(Sk-Lc) S. krylovii + Leymus chinensis | 81.6 ± 1.2 | 79.0 ± 0.4 | ns |
克氏针茅-糙叶黄芪-星毛委陵菜(Sk-As-Pa) S. krylovii + A. scaberrimus + P. acaulis | 68.2 ± 0.6*** | 66.5 ± 0.6 | – |
Fig. 2 Observed and expected nitrogen remaining percentage in litter mixtures. Asterisks denote significant differences between the observed and expected values (*, p < 0.05, ***, p < 0.001). Sk-As, Stipa krylovii + Astragalus scaberrimus; As-Pa, Astragalus scaberrimus + Potentila acaulis; Pa-Sk, Potentila acaulis + Stipa krylovii; Sk-Lc, Stipa krylovii + Leymus chinensis; Sk-As-Pa, Stipa krylovii + Astragalus scaberrimus + Potentila acaulis.
Fig. 3 Observed and expected phosphorus remaining percentage in litter mixtures. Asterisks denote significant differences between the observed and expected values (*, p < 0.05; **, p < 0.01; ***, p < 0.001). Sk-As, As-Pa, Pa-Sk, Sk-Lc, Sk-As-Pa, see Fig. 2.
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