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| Effects of thinning on litter characteristics of semi-natural Larix olgensis + Picea asperata + Abies nephrolepis mixed forests |
| Li Weisong1, Mao Jun2, Zha Tonggang3, Wang Haiyan1, Li Xu3 |
| 1.College of Forestry, Beijing Forestry University, 100083, Beijing, China;2.Fanhua Construction Limited Co. ,100014, Beijing, China;3.College of Soil and Water Conservation, Beijing Forestry University, 100083, Beijing, China |
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Abstract We collected soil and litter samples from twenty plots of semi-natural Larix olgensis-Picea asperata-Abies nephrolepis mixed forests under four thinning intensities (0 (control), 20%, 30% and 40%) in Jingoulin Forest Farm, Jilin Province, in order to assess long-term effects of thinning on litter characteristics. The correlations between litter characteristics and soil nutrients were analyzed. The results are shown as follows: 1) The standing crop of litter in semi-natural L. olgensis-P. asperata-A. nephrolepis mixed forests was 51.44 - 181.60 t/ hm2, the water holding capacity of litter was 20.33 -47.27 t/ hm2, and the litter C:N ratio ranged between 61 and 72. Concentrations of litter N, P and K showed different orders under different thinning intensities and litter C concentration gradually increased with thinning intensity; however, there were no significant differences in standing crop, water holding capacity and nutrient concentration of litters under different thinning intensities ( P>0.05). 2)Correlations between litter characteristics and soil nutrients showed certain similarity under different thinning intensities, indicating that thinning intensity was not the main affecting factor. 3) Twenty-seven years after thinning, no significant differences were observed in litter characteristics under varying thinning intensities, showing no long-term thinning effects in our study.
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Received: 17 March 2014
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LI Changzhun, CHEN Lixin, DUAN Wenbiao, LI Shaoran, LI Yifei, YU Yingying, ZHU Jiahui, ZHAO Gerong. Effects of litter treatment on soil organic carbon, total nitrogen and total phosphorus in different forest types[J]. SSWC, 2020, 18(1): 100-109. |
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