花卉培养土的酸碱性及其调节的研究

The study and adjustment about the pH value of cultivatable soil of flowers

为了栽培花卉更好的生长及长期开花提供理论依据 ,主要对以松针土为主料配制的花卉培养土酸碱性进行了分析与调节 ,并对调节酸碱性的程度以及要加入酸性物质的种类和数量做了初步研究。以松针土为主料配制出不同配比的花卉培养土 ,其 pH值范围较宽 ,显示弱碱性、中性、弱酸性、强酸性。试验过程中以 1mol LH2 SO4和 1mol LFeSO4为酸性调节物调节培养土酸碱度。结果表明 :FeSO4作为酸性调节物效果最好。根据加入 2 0mL 1mol LFeSO4溶液后pH值变化曲线 ,可查出计划种植的花卉所要求加入酸性调节物后土壤应达到的pH值 ;根据△pH值的变化图 ,可查出调节至花卉所适宜的酸碱度需加入的酸性调节物的数量。

The analysis and adjustment of pH value about cult ivatable soil that i s mixed by pine needles soil selected as the main material are studied in this p aper. The degree to pH value and the kinds and the quantities of the acid matter s needed are also primarily studied. The pH scope of the cultivatable soil in di fferent proportion is so wide that the soil shows alkalescence, neutral, feeble acidity, strong acidity. 1 mol/L H 2SO 4 and 1 mol/L FeSO 4 are used as acid to adjus t the pH value of the culture soil in the course of the experiment. The results indicate that the effect on 1 mol/L FeSO 4 is the best. The soil pH suited on flowers to be planted can be read from the pH curve of adding to 20 mL 1 mol/L F eSO 4. We can also read the quantities of acid matters that is needed to adjust to the pH value of the soil from the graphic of △pH. The conclusion of this pa per offered the theoretical basis for the better growing and long abloom of flor iculture.