花棒人工林植物群落组成及土壤养分的变化研究  

Research on the Composition of the Artificial Plantation of the Hedysarum scoparium and Variation of Soil Nutrient

作　　者：刘丽丹[1] 

机构地区：[1]宁夏大学农学院,宁夏银川750021

出　　处：《安徽农业科学》2010年第17期9321-9323,共3页Journal of Anhui Agricultural Sciences

基　　金：宁夏大学农学院青年教师科研资助项目

摘　　要：[目的]探讨沙地人工植物群落的演变规律,进一步认识花棒对沙地的改良效果。[方法]于2009年对毛乌苏沙地不同生长年限的人工花棒林进行植物群落组成、结构和土壤理化性质等的调查。[结果]花棒人工林随着沙地植被的演替,植物种数增加,群落结构具有复杂的垂直成层现象,逐渐由多年生的灌木、半灌木结构演变为以草本-半灌木结构为主的植物群落结构。不同发育时期的花棒人工植被对土壤养分的作用不同,在0~30 cm土层中,有机质、速效钾、全氮、水解性氮、全磷、有效磷含量都表现为：35年生群落〉19年生群落〉7年生群落〉3年生群落〉流动沙丘,且各养分含量都表现出随土层加深而明显下降的趋势。[结论]花棒人工林随着沙地植被的演替,群落组成趋于丰富,结构趋于复杂。随着改造时间的延长,花棒人工植被对土壤养分的积累作用可逐渐提高。[Objective] The efficiency of the Hedysarum scoparium planting on the sandy soil improvement would further be understood through the exploration of the evolution principle of its artificial planting community in sand.[Method] The investigation of the composition and structure of the artificial Hedysarum scoparium plantation with the different growth ages and the physical and chemical property of the soil around the plant was conducted in 2009.[Results] With the evolution of the sandy vegetation and the increment of the number of plant species in the sandy soil,the community structure of the artificial plantation of Hedysarum scoparium showed the complex phenomena of vertical stratification and the plantation would gradually be evolved from the perennial shrubs or semi-shrub structure to the structure with the herb and semi-shrub being taken as main plantation.The action of the artificial Hedysarum scoparium vegetation in different developmental stages to the structure of soil nutrient was different;the content of organic matter,potassium,total nitrogen,hydrolysable nitrogen,total phosphorus,available phosphorus in the soil of 0 ~ 30 cm under ground were as follows： the community at 35 years old the community at 19 years old the community at 7 years old the Community at 3 years old the community in mobile dunes,and the content of the nutrient in soil showed a significant downward trend at a deeper and deeper soil level.[Conclusion] The composition and structure of the community of the artificial plantation of Hedysarum scoparium in sand would be much richer and more complicate with the succession of its artificial vegetation.The accumulation of the nutrient in sandy soil,affected by the artificial vegetation of Hedysarum scoparium,could be gradually increased with the time-lasting of artificial plantation.

关 键 词：毛乌苏沙地 花棒 植物群落 土壤 

分 类 号：S714[农业科学—林学]