三峡库区汝溪河流域柏木林土壤氮素及酶活性特征

doi:10.11707/j.1001-7488.20131204

Abstract

Abstract:

The soil nitrogen content, enzyme activities, and their relationships in the pure forest of Cupressus funebris and mixed forest of C. funebris+Cyclobalanopsis glauca in Ruxi River watershed were investigated in the Three Gorges Reservoir Area. The results showed that the content of ammonium nitrogen in three soil layers (0-20,20-40,and 40-60 cm) under the two forest stands were similar. However, the total nitrogen content in each soil layer of the mixed forest was respectively 61.1%, 55.7%, and 19.8% higher than those of the pure forest, and the differences were all significant. Compared to the pure forest, the nitrate nitrogen content in each soil layer of the mixed forest was also increased 10.3%, 10.5%,and 25.5%, respectively. The nitrogen content of soil microbial biomass in each soil layer of the mixed forest was respectively 1.2, 1.0,and 1.6 times higher than those of the pure forest. Moreover, the activities of protease, catalase, urease, and invertase in each soil layer of the mixed forest were significantly higher than those of the pure forest. The results indicated that, compared to the pure forest of C. funebris, the mixed forest of C. funebris+Cyclobalanopsis glauca could obviously improve soil enzyme activities, soil nitrogen conditions, and ecological environment in the stand.

Key words: Cupressus funebris pure forest, Cupressus funebris+Cyclobalanopsis glauca mixed forest, soil nitrogen, enzyme activities

CLC Number:

S714.2

Feng Dalan, Huang Xiaohui, Zhang Linan, Huang Zhonghua, Li Changxiao, Geng Yanghui, Zeng Jing. Characteristics of Soil Nitrogen Content and Enzymatic Activities in Cupressus funebris Plantations along Ruxi River Watershed in the Three Gorges Reservoir Area[J]. Scientia Silvae Sinicae, 2013, 49(12): 25-29.

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Characteristics of Soil Nitrogen Content and Enzymatic Activities in Cupressus funebris Plantations along Ruxi River Watershed in the Three Gorges Reservoir Area

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