建瓯市丘陵山地草地生态系统营养元素循环研究  

Characteristics of Nutrient Cycling in Mountainous Grassland Ecosystem of Jian'ou City

作　　者：邓汉明[1] 

机构地区：[1]建瓯市水土保持办公室,福建建瓯353100

出　　处：《水土保持通报》2003年第4期9-12,20,共5页Bulletin of Soil and Water Conservation

基　　金：福建省计委科技攻关项目"南方山地高效农业模式研究与应用"总课题的专题之一(85-001)

摘　　要：以野外定位试验3a连续观测资料和实验室分析为基础,从地上部和地下部2个角度研究了建瓯市丘陵山地草地生态系统营养元素循环。结果表明,草地生态系统主要营养元素在土壤分室的总贮量排序为:Al>Fe>K>Mg>Ca>Zn>N>Mn>P,体现了亚热带酸性土壤的化学组成特征;N,P,K及Ca等营养元素循环系数较大,是草地生态系统物质能量循环过程中的活跃元素,Al,Fe等土壤中含量较高的元素,循环系数较小;揭示了在丘陵山地发展草地生态系统应增加土壤分室N,P,K及Ca等营养元素的含量和其有效性,提高土壤分室与植被分室之间营养元素循环通量,选育适合当地特点的草种,从而促进水土保持生态系统的建设。Based on 3 -year continuous field observations and laboratory analyses, the aboveground and the belowground nutrient cyclings were studied in mountainous grassland ecosystem of Jian'ou City. Each kind of nutrient content in the soil followed the order of Al>Fe>K>Mg>Ca>Zn>N>Mn>P, it indicated the chemical characteristic of acid soil in the subtropics. The active elements, such as N, P, K and Ca, played an important role in the flows of material and energy because their cycle coefficients were greater than other elements like Al and Fe. In order to develope the mountainous grassland ecosystem, it was the key way to increase contents and availability of N, P, K and Ca in the soil and nutrient fluxes between vegetation and soil. Further, from the point of the soil and water conservation, suitable native grass species can be planted for increasing biomass and surface coverage in grassland ecosystem.

关 键 词：山地 草地生态系统 养分循环 

分 类 号：S812.8[农业科学—草业科学]