盐碱地土壤改良试验研究——以粉煤灰和煤矸石改良盐碱土为例

An Experiment of Amelioration to Saline Alkali:Improved Saline-alkali Soil by Coal Ash and Coal Gangue as An Example

采用盆栽试验,重点探讨了粉煤灰和煤矸石改良盐碱土对柽柳生长的影响.结果表明:施加15%粉煤灰+15%淤泥改良盐碱土效果明显好于10%粉煤灰+10%煤矸石+10%淤泥的效果,好于20%粉煤灰的改良效果.基质中加入粉煤灰,对提高柽柳发芽率、缩短枝条发芽时间和提高萌发枝条成活率均具有促进作用.施加粉煤灰改良盐碱土的优劣比例顺序为:粉煤灰15%>20%>10%.本试验达到了试验初衷要求和期望值,对于已获取的数据的分析是科学的、可行的,具有借鉴意义.

Abstract： By using pot experiment, the paper focuses on the effects of saline-alkali soil, which is improved by adding coal ash and coal gangue, to the growth of tamarisk. The result shows that the improvement effect of saline-alkali soil by adding 15% coal ash and 15% sludge is better than adding 10% coal ash, 10% coal gangue and 10% sludge, or adding 20% coal ash. To add coal ash to the matrix plays a driving and positive role to raising the sprout rate, shortening the branch sprout time and improving branches survival rates of tamarisk. By comprehensive comparison, the order of proportion of adding coal ash to improve saline-alkali soil is 15 % 〉 200% 〉 10% . Due to the restriction of the experimental condition, the improvement effect of adding coal gangue to saline-alkali soil is inconspicuous which can not illustrate the improved effects of coal gangue. This disaccords with the previous researches. Therefore, the experiment of adding coal gangue to saline-alkali soil needs to be promoted. The experiment reflects the regularity of improvement of saline-alkali soil, and illustratesthe issue of improving the saline-alkali soil from the macroscopic level. Generally speaking, the experiment has basically achieved the original require- ments and expectations, and the analysis of the acquired data＇is scientific and practicable