生态环境学报Issue(8)：1297-1302,6.
庐山植物园11种植物的根际土壤氮磷有效性和酶活性
Available nitrogen and phosphorus and biological enzyme activities in rhizosphere soils beneath 11 plant species in Lushan Mountain
摘要
Abstract
To assess the environmental adaptability of tree species from different provenances to the acid soils in Lushan mountains, the physicochemical characteristics and biological enzyme activities in the soils beneath different trees and their rhizospheric effects were investigated. 11 tree species introduced from different provenances were selected typically in Lushan botanical garden. In growing seasons, the rhizosphere and non-rhizosphere soils were collected, and the soil pH values, organic carbon contents, available nitrogen and available phosphorus contents, urease and acid phosphatase activities were measured. The results showed that:(1) there were significant differences in the available nitrogen contents (P<0.01), phosphorus contents (P<0.05) and the acid phosphatase activities (P<0.01) except for the urease activities in soils beneath different tree species. (2) There presented different characteristics in the nutrient availability and enzyme activities in between rhizosphere and non-rhizosphere soils beneath different tree species. There were significant differences (R/S>1) in the available phosphorus contents and the acid phosphatase activities in between rhizosphere and non-rhizosphere soils beneath most tree species such as Manglietia insignis, Manglietia chingii. The available phosphorus contents were significant differences (P<0.05) in between rhizosphere and non-rhizosphere soils beneath Parakmeria yunnanensis. There were significant differences (P<0.05) in the acid phosphatase activities in between rhizosphere and non-rhizosphere soils beneath some tree species such as Manglietia insignis, Manglietia chingii, Manglietia patungensis, Illicium henryi, Camellia crapnelliana and native tree (Rhododendron fortunei). However, there were little differences in the available nitrogen and urease activities in between rhizosphere and non-rhizosphere soils among all tree species. The urease activities in non-rhizosphere soils were higher than in rhizosphere soils beneath some trees such as Manglietia insignis and Manglietia patungensis. (3) There were significant differences in the available phosphorus contents and the acid phosphatase activities in between rhizosphere and non-rhizosphere soils beneath most tree species from different provenances. For example, the differences were larger beneath the trees from southwestern region in China such as Manglietia chingii, Manglietia patungensis and Parakmeria yunnanensis and trees from south of china such as Manglietia insignis and Illicium henryi than that beneath trees such as Michelia maudiae and Rhododendron fortunei form east of china. The same were that in the acid phosphatase activities. However, there were little differences in the urease activities and available nitrogen contents in between rhizosphere and non-rhizosphere soils beneath all tree species. (4) The available nitrogen, available phosphorus contents and acid phosphatase activities were significantly and positively related to the organic carbon contents (P<0.01) in rhizosphere soils. Both the available phosphorus contents (P<0.01) and the acid phosphatase activities (P<0.05) were significantly and positively related to the available nitrogen, and the acid phosphatase activities was significantly and negatively correlated with the pH values (P<0.05). This indicated that the pool of soil nutrient and the physicochemical environments in the rhizospheric area were influenced by the accumulation of the soil organic matters.关键词
庐山/根际土壤/有效养分/酶活性Key words
Lushan/rhizosphere soil/available nutrient/enzyme activity分类
农业科技引用本文复制引用
杜有新,何春林,丁园,黄强..庐山植物园11种植物的根际土壤氮磷有效性和酶活性[J].生态环境学报,2013,(8):1297-1302,6.基金项目
科技部科技基础性专项（2009FY120200）；国家科技支撑计划 （）
