不同年龄马尾松人工林水源涵养能力比较研究

摘要

对广西横县镇龙林场不同年龄马尾松人工林凋落物层和土壤层的水源涵养能力进行比较研究.结果表明,随着马尾松人工林林龄增大,地表凋落物量逐渐增多,到16年生林分达到最高,此后,凋落物量逐渐降低,并趋于稳定；凋落物层最大持水量与凋落物量呈极显著正相关(P＜0.001).表层土壤非毛管孔隙度和非毛管孔隙度/毛管孔隙度等指标随林龄增大呈逐渐增加的趋势；土壤总持水量及综合水源涵养力随林龄增大也逐渐升高.%The water-holding capability of litter and soil in Pinus massoniana plantations at different ages was compared in Zhenlong Forest Farm, Cuangxi Province. The results showed that litter accumulation and its maximum water-holding capacity increased with stand age and reached its peak in 16 years old plantation, decreased and reached a steady state afterwards. There were positive relationships between litter accumulation and its maximum water-holding capacity (P<0.001). Noncapillary porosity and the ratios of noncapillary porosity and capillary porosity gradually increased with stand age. The water-holding capacity of 0 - 60 cm soil and the integrated water-holding capacity all tended to increase with the augmentation of stand age.