| 杉木林采伐迹地再造林后土壤调蓄水分功能恢复研究 |
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| 引用本文： | 杨贤均,邓云叶,段林东.杉木林采伐迹地再造林后土壤调蓄水分功能恢复研究[J].林业科学研究,2016,29(2):261-267. |
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| 作者姓名： | 杨贤均 邓云叶 段林东 |
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| 作者单位： | 邵阳学院城市建设系, 湖南 邵阳 422004;邵阳学院城市建设系, 湖南 邵阳 422004;邵阳学院城市建设系, 湖南 邵阳 422004 |
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| 基金项目： | 湖南省教育厅项目(2011C1124) 、湖南省科技厅项目( 2012SK3163) |
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| 摘 要： | 目的]探讨杉木人工林采伐前、后及其采伐迹地造林后林地土壤调蓄水分功能的变化,揭示采伐地造林后,幼林对土壤蓄水功能的调节恢复作用.方法]采用定位连续观测方法,在24年生杉木人工林伐前、伐后以及造林后1年、3年、5年、8年的样地内采集土壤样品,进行室內测试分析.结果]表明:与伐前相比,杉木人工林采伐后1 m深土壤层毛管孔隙度提高了1.70%,非毛管孔隙度下降了4.95%;伐后1 m深土壤层最大持水力、最小持水力和毛管持水力比伐前分别提高了4.02%、2.67%和5.31%,但土壤贮水力下降14.30%;0~20,20~40 cm土层的初渗速率分别下降19.81%和16.95%,稳渗速率分别下降12.97%和14.49%;造林后林分对土壤调蓄水分功能的调节作用,随着林龄增加而增大,8年生幼林0~20,20~40 cm土层对土壤水分的初渗调控能力恢复到采伐前的62.50%和58.83%,稳渗的调控恢复到采伐前的62.22%和48.79%;若以伐后与伐前土壤的最大持水力、最小持水力和毛管持水力的差值为100%,8年生幼林其与伐前的差异只有16.90%,17.84%和23.20%.土壤贮水力恢复到采伐前33.34%的水平.结论]杉木人工林的采伐导致土壤调蓄水分功能减弱,采伐迹地再造林能逐步改善林地土壤调蓄水分功能,而且随着幼林林龄增加调节功能逐步增强.
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| 关 键 词： | 杉木人工林 土壤 蓄水功能 采伐迹地 再造林 功能恢复 |
| 收稿时间： | 2015/7/28 0:00:00 |
Research on Restoration of Soil Moisture Regulation Function in the Harvested Chinese Fir Plantation after Reforestation |
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| YANG Xian-jun,DENG Yun-ye and DUAN Lin-dong.Research on Restoration of Soil Moisture Regulation Function in the Harvested Chinese Fir Plantation after Reforestation[J].Forest Research,2016,29(2):261-267. |
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| Authors: | YANG Xian-jun DENG Yun-ye and DUAN Lin-dong |
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| Institution: | Department of City Construction, Shaoyang University, Shaoyang 422004, Hunan, China;Department of City Construction, Shaoyang University, Shaoyang 422004, Hunan, China;Department of City Construction, Shaoyang University, Shaoyang 422004, Hunan, China |
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| Abstract: | Objective]In order to understand the changes of regulation function of soil moisture for the pre-harvest, post-harvest and reforestated Chinese fir (Cunninghamia lanceolata) plantation.Method]By continuous observation in fixed locations of 24-year-old Chinese fir plantation, the soil samples before harvest, 1 year after harvest and 1 year, 3 years, 5 years, and 8 years after reforestation were collected, and the function of soil water regulation and storage capacity were investigated by laboratory data analysis.Result]The results showed that compared with pre-harvest period, the capillary porosity of soil 1 m in depth increased by 1.70% at post-harvest period, and the non-capillary porosity decreased by 4.95%; the water holding capacity, the minimum holding capacity and capillary power of the soil increased by 4.02%, 2.67% and 5.31% respectively, but the water storage capacity declined by 14.30%; the initial infiltration capacity of the soil 0~20cm and 20~40 cm in depth decreased by 19.81% and 16.95% respectively, the stable infiltration capacity also fell by 12.97% and 14.49% respectively; during the reforestation stage, the water regulation and storage function gradually improved along with the ages of the Chinese fir plantation, for example, the initial infiltration capacity of the soil with 0~20 cm and 20~40 cm in depth at Chinese fir plantation 8 years after reforestation recovered to 62.50% and 58.83% respectively, the stable infiltration capacity also recovered to 62.22% and 48.79% compared with pre-harvest stage; If the soil before cutting with the maximum water holding capacity after cutting, minimum water holding capacity and capillary water holding capacity of 100% of the difference. with the 8-year-old stand differences before cutting only 16.90%, 17.84% and 23.20%; the soil water storage capacity returned to 33.34% of pre-harvest level. Conclusion]The regulating function of soil moisture was weakened by harvest; however, with the reforestation activities, all the capacity of soil moisture will gradually recovered. |
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| Keywords: | Chinese fir plantation soil water storage function cutover land reforestation function recovery |
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