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沙芦草+胡枝子混播草地的生物量及土壤速效养分 预览 被引量:6

Biomass and available soil nutrient of Agropyron mongolicum +Lespedeza davurica pasture
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摘要 采用田间调查取样和室内分析相结合的方法,在宁夏盐池县四墩子试验基地以单播沙芦草(Agropyron mongolicum)、单播达乌里胡枝子(Lespedeza davurica)、同行混播和灌木地同行混播栽培草地为研究对象,研究了不同播种方式对草地生物量和土壤速效养分分布的影响,结果表明,地上生物量表现为同行混播草地】单播沙芦草草地】灌木地同行混播草地】单播达乌里胡枝子草地;随着土层深度的增加,地下生物量和土壤速效养分含量均呈降低的趋势,0-40cm各土层单播达乌里胡枝子草地地下生物量最小;土壤速效氮和速效钾含量均以同行混播草地最低,土壤速效磷含量以灌木地同行混播草地最低,说明混播不利于土壤速效养分的积累。 In this study,Agropyron mongolicum and Lespedeza davurica were single sowing,peer mixed sowing and peer mixed sowing in shrub land at Sidunzi experimental base,Yanchi county,Ningxia,to study the effect of sowing methods on pasture biomass and available nutrient distribution of soil.The result showed that aboveground biomass rank from high to low were peer mixed pasture>single sowing A.mongolicum pasture>peer mixed pasture in shrub land>single sowing L.davurica pasture.With the increasing of soil depth,underground biomass and soil available nutrient content showed a decreasing trend.The underground biomass in each 0-40cm soil layer in single sowing of L.davurica was the least.The content of available N and K was the least in peer mixed pasture,and the content of available P was the least in peer mixed pasture in shrub land,indicate that mixed sowing is not conducive to the accumulation of soil nutrients.
作者 陈晶 王峰 谢应忠 王俊杰 汤阳 许冬梅 CHEN Jing;WANG Feng;XIE Ying-zhong;WANG Jun-jie;TANG Yang;XU Dong-mei;School of Agriculture,Ningxia University;Breeding Base of State Key Laboratory for Preventing Land Degradation and Ecological Restoration,Ningxia University;Bureau of Agriculture and Husbandry in Yanchi County;
出处 《草业科学》 CAS CSCD 北大核心 2015年第4期492-500,共9页 Pratacultural Science
基金 林业公益性行业科研专项(201304311)
关键词 沙芦草 达乌里胡枝子 播种方式 草地生物量 速效养分 Agropyron mongolicum Lespedeza davurica sowing method pasture biomass available nutrient
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