几种无土栽培代用基质缓冲性研究初报

泥炭为中国目前应用最广泛的有机无土栽培基质，但其开发与使用造成严重的环境压力，质优价廉的环保基质的开发已成当务之急。作物秸秆的开发使用不失为一条有效途径。从缓冲性的角度对发酵以后的农业有机废弃物进行了研究，并与传统基质进行了比较，结果表明：各代用基质酸、碱、盐缓冲容量均高于泥炭及其它无机基质，能够形成相对稳定的根际环境，最大程度防止由于营养液pH或EC的剧烈变化对植株根系造成伤害。

Studies on the Buffering Capacity of Several Substitute Growing Media

Peat is widely used as a growing medium in greenhouse production, but heavy exploitation of peat will seriously destroy the ecological environment. It is necessary to find new material to substitute for peat. In this paper the buffering capacity of several substitutes growing media which made by composted agricultural cast-offs were studied. The results showed that the acid, alkaline and saline buffering capacity of the substitute media were better than the peat and the non-organic media. The substitute media, therefore, have better synthetic characteristics than the peat, which ensures a balanced environment for the root system.