复配对芦苇末基质物理性状的影响  

Effect of mixing on the physical properties of reed residue substrate

作　　者：李谦盛[1] 裴晓宝[1] 郭世荣[1] 李式军[1] 

机构地区：[1]南京农业大学园艺学院,江苏南京210095

出　　处：《南京农业大学学报》2003年第3期23-26,共4页Journal of Nanjing Agricultural University

基　　金：国家高技术研究发展计划 (2 0 0 1AA2 470 12 );江苏省十五首批科技攻关项目 (BG2 0 0 0 5 0 1)

摘　　要：研究了芦苇末基质与泥炭、蛭石、珍珠岩等常用基质混合后的体积收缩、容重、孔隙分布和吸水性等物理性状的变化规律。当芦苇末混合 10 %～ 2 5 %蛭石时 ,复配基质的总孔隙度在 75 %左右 ,持水孔隙约 5 5 % ,而通气孔隙在 15 %～2 0 % ,固、液、气三相比例适合作物生长 ;同时按这一比例混合的基质吸水性得以最大改善 。The changes of physical properties,including porosity distribution,bulk density,water absorption capacity and volume shrinkage of reed residue substrate mixed with peat,vermiculite and perlite were investigated,respectively.When mixing with 10%25% vermiculite,the total porosity of the mix was about 75%; air space,15%20%; and container capacity,55%.Solid,liquid and gas ratio of the substrate was suitable for plant growth.And this formula significantly improved the water absorption capacity,initial wettability and rewettabilty of the over dry substrate.

关 键 词：复配基质 芦苇末 物理性状 体积收缩 容重 孔隙分布 吸水性 

分 类 号：S317[农业科学—作物栽培与耕作技术]