【摘要】 用泥炭、河砂和煤渣分别组成花卉营养土的试验表明,泥炭与河砂以75∶25或50∶50容积比例组成的基质对黄菊和万寿菊的效果最好,肥料效率也最高,煤渣的效果明显低于河砂;从组分的细度看,河砂以粒径2—0.15mm最好,煤渣在使用前除去过细部分会大大提高其利用价值。花卉对栽培基质的通气性要求比一般作物高,生长前期通气孔度达38—46％,以后下降为28—33％。因而必须注意植前营养土的合理调制,以获得良好的物理性。更多还原

【Abstract】 An experiment on artificial soils consisting of peat , sand and cooking coal ash suggests that the optimum ratio of peat and sand lor best growth and fertilizer efficiency is 75:25 or 50:50 in volume for Chrysanthemum and Tagetes erecta.The effect of sand is much better than cooking coal ash. The sand with 2-0.5mm in diameter showed the best result. Cooking coal ash will be more valuable when its fine particles were rejected. Aeration of growth medium is much more important for flowers than for other plants. Aeration porosity reached up to 38-48% in early growth stage and dropped down to 28-33% afterwards. Therefore it is necessary to adjust the composition of actificial soil for better physical properties.更多还原