论文部分内容阅读
采用凋落物分解袋法,研究了土壤动物对川西高山/亚高山森林代表性植物康定柳、方枝柏、红桦和岷江冷杉凋落物在分解第一年(2011年11月—2012年10月)不同关键时期质量损失的贡献.结果表明:在凋落物第一年的分解过程中,不同物种凋落物的分解速率大小依次为康定柳>红桦>岷江冷杉>方枝柏,且均为生长季节大于冻融季节.土壤动物对凋落物分解的贡献率(P fau)为方枝柏(26.7%)>岷江冷杉(18.8%)>红桦(15.7%)>康定柳(13.2%),其中康定柳和方枝柏的P fau在生长季节大于冻融季节,而红桦和岷江冷杉的P fau为冻融季节大于生长季节.冻融季节土壤动物的作用与凋落物初始C、P和N/P显著相关,而生长季节则与N、C/N、木质素、木质素/纤维素显著相关.
The litter decomposition bag method was used to study the effects of soil fauna on the litter of Kangdingliu, Fangzhibai, Betula platyphylla and Abies faxoniana in the first year (November 2011-October 2012) ) In different key periods.The results showed that during the first year of litter decomposition, the litter decomposition rates of different species were as follows: Kangdingliu> Betula albola> Abies faxoniana> The seasonal distribution of soil fauna was higher than that of freeze-thaw season. The contribution rate of soil fauna to litterfall decomposition was Pfau (26.7%), Minjiang fir (18.8%), birch (15.7%) and Kangdingliu P fau of Kangdingliu and Fangzubai were greater than those of freezing and thawing in the growing season and P fau of red birch and Abies faxoniana were larger than those in the growing season.The effects of soil animals in the freezing and thawing season were similar to those of litter C, P and N / P, while the growing season was significantly related to N, C / N, lignin and lignin / cellulose.