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当前位置: 首页 > 文章 > 东祁连山高寒草地返青期不同草地型土壤磷的分布特征 中国草地学报 2009,31 (3) 47-54
Position: Home > Articles > Distribution Characteristics of Soil Phosphorus at Turning Green Stage in Different Alpine Grasslands in the Eastern Qilian Mountains Chinese Journal of Grassland 2009,31 (3) 47-54

东祁连山高寒草地返青期不同草地型土壤磷的分布特征

作  者：
杨成德;陈秀蓉;龙瑞军;徐长林;薛莉
单  位：
兰州大学草地农业科技学院;甘肃农业大学草业学院/草业生态系统教育部重点实验室/中-美草地畜牧业可持续发展研究中心
关键词：
东祁连山;高寒草地;土壤磷;微生物量磷;分布
摘  要：
试验在东祁连山选择代表性的七种高寒草地型为研究对象,在返青期对其土壤微生物量磷(MBP)、全磷和速效磷及其相关性进行了研究。结果表明,土壤全磷和速效磷分别介于1.0～2.0g/kg和14.3～52.9mg/kg,样地间差异较大,且速效磷上层高于下层,除禾草草地外草本草地显著高于灌丛草地(P<0.05);土壤微生物量磷及其对土壤全磷贡献率分别介于22.46～64.27mg/kg和1.75%～4.59%,且上层高于下层;微生物量磷与微生物量碳氮除嵩草草地外均呈极显著正相关(P<0.01),草地型对该相关性的影响不明显,该相关性由土壤微生物本身或其群落结构决定;土壤微生物量磷与土壤化学性质关系密切,植物群落对此相关性影响不明显;微生物量碳磷比和微生物量氮磷比分别介于4.38～21.50和1.07～3.88,草地型间差异显著(P<0.05),说明在不同草地型间土壤微生物量及群落结构均有差异。
译  名：
Distribution Characteristics of Soil Phosphorus at Turning Green Stage in Different Alpine Grasslands in the Eastern Qilian Mountains
作  者：
YANG Cheng-de1 ,CHEN Xiu-rong1 ,LONG Rui-jun2 ,XU Chang-lin1 ,XUE Li1(1.College of Pratacultural Science,Gansu Agricultural University,Key Laboratory of Grassland Ecosystem of Ministry of Education,Sino-U.S. Center for Grazingland Ecosystem Sustainability,Lanzhou 730070,China; 2. College of Pastoral Agriculture Science and Technology,Lanzhou University,Lanzhou 730020,China)
关键词：
Eastern Qilian Mountains; Alpine grassland; Soil phosphorus; Microbial biomass phosphorus; Distribution
摘  要：
Rhododendrons brushland(DJ),Salix cupularis brushland(GL),Dasiphoru fruticosa brushland(JL),Polygonum viviparum grassland(ZY),Grass steppe(HC),Swamp grassland(ZZ) and Kobresia grassland(SC),which delegated seven different alpine grassland types in the Eastern Qilian Mountains of the Qinghai-Tibetan Plateau,west of China,were selected to investigate their soil phosphorus (including microbial biomass phosphorus(MBP),total soil phosphorus and available phosphorus ) and their correlationship. The total soil phosphorus and the available phosphorus which were different between the types of grassland varied from 1.0～2.0g/kg and 14.3～52.9mg/kg,respectively. The content of available phosphorus were more at the upper layer than those at lower layer and there were significant difference between the grassland and brushland (P<0.05) except HC. The MBP and the contribution of MBP to total phosphorus,which were more at the upper layer than those at lower layer,ranged from 22.46～64.27mg/kg and 1.75%～4.59%,respectively. The MBP showed significant positive correlation at P<0.01 with microbial biomass carbon and nitrogen under seven sites,which showed that the grassland types was not important for the correlation and the microorganism themselves or their community structure were key to the correlation. The MBP showed significant correlation with soil chemical property,but the plant community affected a little on the correction. The MBC/MBP and the MBN/MBP that varied from 4.38～21.50 and 1.07～3.88 respectively were significant difference among the sampling sites (P<0.05),which showed that the values of soil microbial biomass and the community structure were different between the grassland types.

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