磷石膏基质改良配方筛选及多年生黑麦草生长特性研究

Choosing of Improvement Formulation of Phosphogypsum Media and Growth Properties of Lolium perenne L.

根据赤泥、粉煤灰和污泥的理化互补特性,采用正交设计法将三者制成9种复合基质改良磷石膏,旨在筛选出适宜多年生黑麦草生长的最优配方。通过对多年生黑麦草的生长特性以及磷石膏基质的物理性质作多重比较分析、极差分析、方差分析、主成分分析以及聚类分析。结果表明:添加改良剂的磷石膏物理性质得到较大改善,多年生黑麦草长势更好;赤泥:粉煤灰:污泥的最佳配比是1∶2∶10;9种配方可以划分为4个等级。

According to their physical and chemical properties,red mud,fly ash and sludge are mixed into nine different media formulations through orthogonal design to improve phosphogypsum.The purpose aims at choosing the best media formulation to be fit for Lolium perenne L.planting.Seven characteristics of growth of Lolium perenne L.and seven physical traits of improvement phosphogypsum were accounted with multiple comparison,range analysis,variance analysis,principal component analysis and cluster analysis.The results showed that combining red mud,fly ash and sludge improve positively physical properties,and promote Lolium perenne L.growth.The best composition of red mud,fly ash and sludge was 1∶2∶10.Nine media formulations of phosphogypsum were divided into four gradations.