QIAO Yanhui,QI Yukun,WANG Yuehai,et al.Analysis and Evaluation on Replacement Models of Secondary Tamarix chinensis Degraded Forest in Yellow River Delta[J].Research of Soil and Water Conservation,2020,27(06):370-376.
黄河三角洲次生柽柳退化林更替改造模式分析评价
- Title:
- Analysis and Evaluation on Replacement Models of Secondary Tamarix chinensis Degraded Forest in Yellow River Delta
- 文章编号:
- 1005-3409(2020)06-0370-07
- Keywords:
- Yellow River delta; secondary Tamarix chinensis; degradedforest; alternate transformation mode
- 分类号:
- S756.4
- 文献标志码:
- A
- 摘要:
- 为筛选出黄河三角洲盐碱地柽柳退化林更替改造的最优林分模式,指导生产中天然次生柽柳林的保护与改造,以黄河三角洲次生柽柳退化林更替改造形成的4种林分和未进行改造的次生柽柳林(对照)为研究对象,对其林分(生长)状况、林地植被和土壤理化特征等方面的效应进行了比较分析和评价。结果表明:(1)次生柽柳退化林分更替改造5 a后的林分状况(林分郁闭度、林木保存率、胸径、树高、冠幅)虽因林分模式不同而有较大差异,但都明显好于次生柽柳退化林分。(2)在植被的种类和生长情况方面,更替改造后形成的林分生境明显好于次生柽柳退化林,林下植物种类增多,耐重—中度盐碱植物种类减少,耐轻—中度盐碱植物种类增加。(3)更替改造的4种林分在土壤孔隙度、有机质及养分含量的指标上均得到显著提高,土壤密度、pH值和含盐量呈降低趋势,土壤理化状况得到明显改善。(4)对林分(生长)状况和土壤理化指标的综合评价分析显示,更替改造的4种林分模式和未进行改造的柽柳退化林分的效应综合评价为:刺槐林>白榆林>白蜡林>盐柳林>次生柽柳退化林。依据柽柳退化林更替改造的4种模式在林分状况、林地土壤理化指标、林下植被的比较分析及综合评价,以刺槐林为最佳,白榆林次之,白蜡林较差,盐柳林最差,不宜选用。
- Abstract:
- In order to select the optimal stand model for replacement and transformation of degraded Tamarix chinensis forest in the saline-alkali region of the Yellow River delta, and guide protection and transformation of natural secondary T. chinensis forest in practice, 4 kinds of replaced and transformed stands of and the unmanaged T. chinensis were selected as the samples, the growth levels of 4 kinds stands, the effects of the 4 kinds of stands and the unmanaged secondary T. chinensis on woodland vegetation and soil physicochemical properties in the Yellow River delta were compared and evaluated. The results showed that:(1)the stand conditions(stand density, tree preservation rate, breast diameter, tree height, crown width)of secondary T. chinensis after replacement transformation of 5 years were significantly better than those of the degraded secondary T. chinensis stand;(2)in terms of the species and growth of vegetation, the stand habitat formed after replacement transformation was obviously better than that of the degraded secondary T. chinensis forest, and the plant species of undergrowth increased, the species of heavy-moderate saline-alkali tolerant plants decreased, and the species of moderate saline-alkali tolerant plants increased;(3)the soil porosity, organic matter and nutrient contents of the four replaced stands were significantly improved, and the soil density, pH value and salinity showed a decreasing trend, and the physicochemical condition of the soil was significantly improved.(4)the comprehensive evaluation of the stand growth status and soil physicochemical indexes showed that the comprehensive evaluation of the effects of the four replaced stand models and the degraded T. chinensis stands without modification decreased in the order: Robinia pseudoacacia>Ulmus pumila>Fraxinu velutina>Salix americana> degraded secondary T. chinensis forest. According to the comparative analysis and evaluation of stand status, soil physicochemical indexes of forest land and undergrowth vegetation of the four models of replacement and transformation of degraded T. chinensis forest, the R. pseudoacacia forest was the best, followed by the U. pumila forest, the F. velutina forest was poor, and the S. americana forest was the worst and should not be selected.
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备注/Memo
收稿日期:2020-01-14 修回日期:2020-02-08
资助项目:山东省林业科技创新项目“滨海盐碱地退化防护林提质增效关键技术研究与示范”(LYCX07-2018-38); 山东省重点研发计划项目“黄河三角洲盐碱地低效防护林恢复及重建关键技术研究”(2017GSF17115)
第一作者:乔艳辉(1974—),女,山东烟台人,大学本科,工程师,主要从事生态、森林培育研究。E-mail:qiaoyanhui66@163.com
通信作者:王月海(1962—),男,山东莱阳人,大学本科,研究员,主要从事生态、森林培育、植被恢复及盐碱地改良研究。E-mail:wyuehai@163.com