摘要
为了明确林龄对杂交楝(印楝×苦楝)人工林土壤水土保持功能的影响,通过测定土壤持水能力、渗透能力和抗蚀能力来综合评价不同林龄杂交楝人工林保持水土功能。结果表明,随着杂交楝林龄增加,林地土壤孔隙结构得到改善、持水性能增加、渗透能力增大,提高了土壤水稳性指数,增加了土壤抗蚀性,土壤水土保持功能得到增强。3年生杂交楝林分的土壤持水性能、渗透能力和抗蚀性与1年生林分之间无显著差异,5年生杂交楝林地各指标均比1年生和3年生林分有显著提高。5年生杂交楝林地的土壤最大持水量、总孔隙度、非毛管孔隙度、平均渗透速率和水稳性指数分别比1年生林地增加18.6%、11.4%、19.8%、45%、30.1%。因此,种植杂交楝可以在短期内提高林分的土壤水土保持功能,在山地丘陵地区值得大力发展杂交楝。
In order to evaluate the effect of forest age of Azadirachta indica × Melia azedarach（hybrid neem tree） plantation on soil and water conservation function,soil water-holding capacity,infiltration capacity and erosion resistance of hybrid neem plantation in different ages were studied.The results showed that soil pore structure,soil water-holding capacity,infiltration capacity,and soil erosion resistance increased with the increase of hybrid neem stand age,soil and water conservation function was further enhanced.Soil water-holding capacity,infiltration capacity,and soil erosion resistance were not significant difference between 3-year-old and 1-year-old hybrid neem stands,however,these variables of the 5-year-old hybrid neem stand were significantly higher than that of 1-year-old and 3-year-old stands.Compared to 1-year-old stand,maximal soil water-holding capacity,total porosity,non-capillary porosity,the average infiltration rate and water stability index of the 5-year-old hybrid neem stand increased by 18.6%,11.4%,19.8%,45% and 30.1%,respectively.Hence,the cultivation of hybrid neem could improve the function of soil and waterconservation in the short term,and it was suitable to plant in the hilly region.
出处
《中国农学通报》
CSCD
2012年第31期46-50,共5页
Chinese Agricultural Science Bulletin
基金
江苏省科技支撑项目"楝素生物农药的制备技术"(BE2010618)
南京大学项目"楝树及楝素生物农药
生物能源研究"(2011320001010380)
关键词
杂交楝
水土保持
土壤持水能力
土壤渗透性
Azadirachta indica × Melia azedarach
soil and water conservation
soil water-holding capacity
soil infiltration capacity
