学术
四种退耕还林（草）模式土壤理化性质动态研究
徐艳梅[1] 张健[1] 梁剑[1,2]
[1]四川农业大学林学园艺学院,四川雅安625014 [2]西昌学院,四川西昌615013
摘 要:
采用定位观察试验，对四川盆西低山区4种退耕还林（草）模式在退耕初期（2003-2005年）土壤理化性质动态变化进行了分析和研究。结果表明：由于林（竹）＋草模式兼顾了经济和生态双重效益，在退耕初期受到人为干扰较大，土壤理化性质变化处于不稳定的状态。2004年停止施肥以后，总体上4种模式的土壤全量养分降低，铵态氮、有效磷和速效钾不同程度增加。在研究期间内，土壤有机质的积累和土壤物理性质没有得到良好的改善，pH值总体上呈下降趋势。不同模式之问的土壤理化性质存在一定差异。土壤综合肥力评价表明，各退耕还林模式土壤IFI值分别为：慈竹＋牛鞭草（0．665）〉苦竹＋牛鞭草（0．601）〉光皮桦＋牛鞭草（0．423）〉撑绿杂交竹＋牛鞭草（0．347）。综合考虑退耕还林的生态、经济和社会效益，认为慈竹＋牛鞭草和苦竹＋牛鞭草是该区值得推广的生态与经济功能兼备且具有可持续经营的退耕还林模式。因此，采用合适的退耕还林模式，并辅以科学的经营管理技术，对该地区的生态建设和经济发展有重要的指导意义。[著者文摘]
文章出处:
《四川农业大学学报》-2007年25卷3期,305 -294-299,305页
栏目信息:
文献标识码:
A
文章编号:
1000-2650（2007）03-0294-06
Development Research on Soil Physical and Chemical Properties in Four De-farming and Reafforestation Patterns
XU Yan-mei, ZHANG Jian, LIANG Jian （1. College of Forestry and Horticulture, Sichuan Agricultural University, Yaan 625014, Sichuan, China; 2.Xichang College, Xichang 615013, Sichuan, China）
Abstract:
A located study was carried out to analyze the dynamic development of soil physical and chemical properties in four de-farming and reafforestation patterns in the west Hilly Area of Sichuan Basin during the early period of restoration. The results shows that, because these forest and grass ecosystems with ecological and economic benefits were seriously affected by human disturbance during the early period of restoration, the soil physical and chemical properties of all patterns fluctuated greatly. After having stopped fertilization in 2004, the total nutrient contents of soil of four patterns had had a decline trend on the whole. The contents of NH4^＋ - N, available P and available K had increased in some extent. In the research period, the accumulation of organic matter and amelioration of soil physical properties were not improved. The soil pH value declined in three years. There are differences between the four defarming and reafforestation in soil physical and chemical properties. The integrated fertility index are： Sinocalarnus affinis ＋ Hemarthria compressa （0.665）2〉 Pleioblastus amarus ＋ Hemarthria compressa （0.601） 〉 Betula luminfera ＋ Hemarthria compressa （0.423） 〉 Bambusa pervariabilis × Dendrocala mopsis ＋ Hemarthria compressa （0.347）. According to the integrated fertility index and three benefits, Sinocalarnus affinis ＋ Hemarthria compress and Pleioblastus amarus ＋ Hemarthria compressa should be popularized. Therefore, proper de-farming and reafforestation patterns and scientific management techniques are the guideline to ecological construction and economic development in the area.[著者文摘]
Key words:
de-farming and reafforestation; soil physical and chemical properties; dynamic variation; soil fertility quality; comprehensive evaluation
基金资助:
国家“十五”科技攻关重大项目（2004BA606A-06）;国家“十一五”科技支撑项目（2006BAC01A11）;四川重点学科建设项目（SZD0419）.
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