川西亚高山不同演替阶段天然次生林土壤碳氮含量及酶活性特征

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胡宗达¹^,^*(

), 刘世荣³, 罗明霞¹, 胡璟⁴, 刘兴良², 李亚非¹, 余昊¹, 欧定华¹

Characteristics of soil carbon and nitrogen contents and enzyme activities in sub-alpine secondary forests with different successional stages in Western Sichuan, China

HU Zong-Da¹^,^*(

), LIU Shi-Rong³, LUO Ming-Xia¹, HU Jing⁴, LIU Xing-Liang², LI Ya-Fei¹, YU Hao¹, OU Ding-Hua¹

图2. 米亚罗林区不同林型土壤酶活性与土壤理化性质和土壤活性有机碳氮冗余分析。CK为岷江冷杉原始林; 80-NSF, 70-NSF和60-NSF分别代表20世纪80、70和60年代砍伐迹地的天然次生林; D, Simpson指数; H, Shannon-Wiener指数。 C:N, 土壤碳氮比; DOC, 可溶性有机碳; DON, 可溶性有机氮; LFOC, 轻组有机碳; pH, 土壤酸碱性; SOC, 土壤有机碳; SWC, 土壤含水率; TN, 全氮; TK, 全钾; βG, β-4-葡萄糖苷酶; CBH, 纤维素水解酶; NAG, β-4-N-乙酰基氨基葡萄糖苷酶; PEO, 过氧化物酶; PHO, 多酚氧化酶。

Fig. 2. Redundancy analysis on the relationship between soil enzyme activity and soil physicochemical properties, dissolved organic carbon and nitrogen, light fraction organic carbon in different forest types in Miyaluo forest area. CK, Abies faxoniana primary forest; 80-NSF, 70-NSF and 60-NSF indicate the natural secondary forest regenerated after logging of the primary forest in 1980s, 1970s and 1960s, respectively. D, Simpson dominance index; H, Shannon-Wiener diversity index. C:N, soil carbon-nitrogen ratio; DOC, dissolved organic carbon; DON, dissolved organic nitrogen; LFOC, light fraction organic carbon; pH, soil acidity-alkalinity; SOC, soil organic carbon; SWC, soil water content; TN, total nitrogen; TK, total potassium. βG, β-4-glucosidase; CBH, cellulose hydrolysis; NAG, β-4-N-acetylglucosaminidase; PEO, peroxidase; PHO, phenol oxidase.