杉木林采伐迹地连栽和撂荒对林地土壤养分与酶活性的影响

doi:10.11707/j.1001-7488.20091211

Scientia Silvae Sinicae ›› 2009, Vol. 12 ›› Issue (12): 65-71.doi: 10.11707/j.1001-7488.20091211

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Nutrient Contents and Enzyme Activities in the Soil of Cunninghamia lanceolata Forests of Successive Rotation and Natural Restoration with Follow after Clear-Cutting

Fang Xi^1,2,3,Tian Dalun^1,2,3,Qin Guoxuan^1,2,Xiang Wenhua^1,2,3

1.Research Section of Ecology，Central South University of Forestry and Technology Changsha 410004； 2.State Key Laboratory of Ecological Applied Technology in Forest Area of South China Changsha 410004； 3.Key Laboratory of Urban Forest Ecology of Hunan Province Changsha 410004

Received:2009-02-18 Revised:1900-01-01 Online:2009-12-25 Published:2009-12-25
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Abstract

Abstract:

Effects of successive rotation and natural restoration after fallow on forest soil nutrient contents and enzyme activities in the first generation Chinese Fir (Cunninghamia lanceolata) forests after clear-cutting were studied at Huitong Ecological Station, Hunan Province. Results showed that soil organic matter and nutrient contents of the naturally restored forests after fallow were generally higher than those of successive rotation of Chinese fir plantation in 0～30 cm and 30～60 cm layers. The differences in available phosphorus and humus carbon content were extremely significant, and the difference in total phosphorus content in 0～30 cm soil layers was significant. In the natural restoration forest, the activities of phosphatase, uresa and sucrase were significantly higher than those in successive rotation of Chinese fir plantation, and hydrogen peroxidase activity in 0～30 cm soil layers was extremely significant higher than that of the successive rotation forest, In 30～60 cm soil layers, the activities of Hydrogen peroxidase and sucrase in the natural restoration forest were significantly higher that in the successive rotation forest, however there was no significant difference in the activities of phosphatase and uresa. The activities of hydrogen peroxidase, phosphatase, uresa and sucrase had an extreme positive correlations with soil organic matter and nutrient contents, among which the correlations with hydrolysable N, available P and humus carbon were more significant than those with organic matter. Principal component analyses also indicated that soil enzyme activities played an important role in soil quality of forest ecosystem, of which the activities of phosphatase, uresa and sucrase could be used as indicators of soil quality in forest ecosystem. Natural restoration after fallow was able to restore soil nutrient contents and enzyme activities, and played an important role in maintaining sustainable forest-land productive forces of Chinese fir plantation.

Key words: Huitong, Hunan Province, Chinese Fir plantation, successive rotation, clear-cutting forestland, natural restoration after fallow, soil nutrients, enzyme activities

CLC Number:

Fang Xi;;Tian Dalun;;Qin Guoxuan;Xiang Wenhua;. Nutrient Contents and Enzyme Activities in the Soil of Cunninghamia lanceolata Forests of Successive Rotation and Natural Restoration with Follow after Clear-Cutting[J]. Scientia Silvae Sinicae, 2009, 12(12): 65-71.

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Nutrient Contents and Enzyme Activities in the Soil of Cunninghamia lanceolata Forests of Successive Rotation and Natural Restoration with Follow after Clear-Cutting

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