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当前位置: 首页 > 文章 > 氮素和水分添加对贝加尔针茅草原植物功能群地上生物量的影响 中国草地学报 2015,37 (2) 7-13
Position: Home > Articles > Effects of Nitrogen and Water Addition on the Aboveground Biomass of Functional Groups in the Stipa baicalensis Steppe,Inner Mongolia,China Chinese Journal of Grassland 2015,37 (2) 7-13

氮素和水分添加对贝加尔针茅草原植物功能群地上生物量的影响

作  者：
李文娇;王慧;赵建宁;皇甫超河;杨殿林
单  位：
沈阳农业大学园艺学院;农业部环境保护科研监测所
关键词：
氮素添加;水分添加;贝加尔针茅草原;植物功能群;地上生物量
摘  要：
在内蒙古贝加尔针茅草原,分别设置对照、1.5g/m2、3.0g/m2、5.0g/m2、10.0g/m2、15.0g/m2、20.0g/m2和30.0g/m2(不包括大气沉降的氮量)8个氮素(NH4NO3)添加梯度和模拟夏季增加降水100mm的水分添加交互试验,研究氮素和水分添加对草原群落植物功能群地上生物量的影响。结果表明:在植物生活型功能群中,氮素和水分的添加显著增加了禾草类植物功能群的地上生物量,减少了豆科类植物功能群的地上生物量;在植物生态类型功能群中,氮素和水分的添加显著增加了中旱生植物功能群的地上生物量,减少了旱生植物和旱中生植物功能群的地上生物量。植物功能群地上生物量除受水分、养分添加水平的影响外,还受功能群自身特性、组成以及植物群落功能群间的相互作用制约。
译  名：
Effects of Nitrogen and Water Addition on the Aboveground Biomass of Functional Groups in the Stipa baicalensis Steppe,Inner Mongolia,China
作  者：
LI Wen-jiao;WANG Hui;ZHAO Jian-ning;HUANGFU Chao-he;YANG Dian-lin;Department of Horticulture,Shenyang Agricultural University;Agro-Environmental Protection Institute,Ministry of Agriculture;Key Laboratory of Original Agro-environment Quality of Ministry of Agriculture and Tianjin Key Laboratory of Agro-environment and Safe-product;
关键词：
Nitrogen addition;;Water addition;;Stipa baicalensis steppe;;Plant functional group;;Aboveground biomass
摘  要：
Interactive tests of eight nitrogen treatments involved nitrogen(NH4NO3)application levels of 0(the check treatment,CK),15,30,50,100,150,200,300 kg N/hm2(referred to as N0,N15,N30,N50,N100,N150,N200,N300,respectively)were set up and 100 mm summer rainfall in S.baicalensis steppe of Inner Mongolia was simulated to study the effects of nitrogen and water additions on aboveground biomass of the plant functional groups.The results showed that water and nitrogen addition increased the aboveground biomass of gramineous plants but decreased the aboveground biomass of leguminous plants from the perspective of the life form functional group;water and nitrogen addition increased the aboveground biomass of intermediate xerads,decreased the aboveground biomass of xerads and intermediate mesophytes from the perspective of the ecological type functional group.The aboveground biomass of plant functional group was not only influenced by nitrogen and water addition,but also restricted by the groups' own characteristics and composition,as well as the interactions between functional groups.

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