侵蚀红壤人工恢复的马尾松林水源涵养功能研究

该文对严重侵蚀红壤3种人工治理措施种草促林、乔灌混交、乔木混交(分别简称为模式Ⅰ,Ⅱ和Ⅲ)恢复的水土保持林及对照(未治理)的水源涵养功能进行了研究.结果表明: 3种模式的水土保持林的林分持水量大小顺序为模式Ⅱ＞模式Ⅲ＞模式Ⅰ,分别比对照高24.97% ,17.57%和9.58%;林分地上部分涵蓄水分功能远大于对照,分别是对照的49.2,27.2和15.8倍.灌木、草本、苔藓3个层次涵蓄水分的能力较低;40cm厚土层饱和持水量以乔灌混交模式的最好,而种草促林模式的最小; 3种水土保持林的土壤初渗值和稳渗值均大于对照的.保护和改善土壤结构,提高土壤层的涵蓄水分能力和土壤渗透性,是提高严重侵蚀地水土保持林水源涵养功能的关键.

Water resources conservation function of Pinus massoniana stands by artificially recovering in eroded red soil

In this paper the functions of water resources conservation were studied on three kinds of artificially recovering plantations of soil and water conservation, grass planting, arbor mixed with shrub, mixed arbors(called patternⅠ,Ⅱand Ⅲ for short respectively) and control(not improving), in seriously eroded areas of subtropical granite red soil. The results showed that: the order of the maximum gross water capacity of stands was pattern Ⅱ> pattern Ⅲ> patternⅠ, respectively higher than control by 24.97%, 17.57% and 9.58%; the water capacity of ground vegetation of stands was respectively 49.2, 27.2 and 15.8 times of control; the ability of water conservation of bush, herbaceous and bryophyte was lower; the quantity of holding water in the 40?cm soil layer of patternⅡ was the best, patternⅠwas the worst. The ratio of initial and stable infiltration of different patterns were higher than that of the control in surface soil, ability of the infiltration in soil was improved to some extent. Protecting and improving soil structure for enhancing soil conserving water ability and soil infiltration, should be the key in improving the functinons of water resources conservation of forests of soil and water conservation in severely eroded soil.