不同土壤改良剂对南方酸性土壤的改良效果研究

针对南方土壤酸性的问题，通过盆栽试验，选用了8种土壤改良剂并以此作为改土措施，研究了不同土壤改良剂对高粱生长特性、土壤物理性状和化学性状的影响，根据高粱、土壤和改良剂之间的相互作用，探讨了改良剂的作用机制，揭示了酸性土壤在改良剂作用下各项性能的变化规律。结果表明，XP2、脱硫灰改良剂和有机肥对高粱生长有较好的作用。酸性土壤施用腐植酸、腐植酸+石灰、XP2、有机肥和脱硫灰改良剂，分别较对照土壤容重有不同程度的下降；石灰、XP1、市售改良剂分别较对照土壤容重有不同程度的增加。经Duncan多重比较，除石灰处理外，其余施用改良剂的处理与不施改良剂（对照）之间的差异达到显著水平（P<0.05）。XP1处理和含有石灰的处理土壤pH较对照处理有较大幅度的提升，达到2个单位左右，差异呈显著水平（P＜0.05）。施用改良剂还可有效缓解酸性土壤铝毒的危害，红壤、赤红壤石灰处理分别比对照降低了18.0%、18.7%，XP1处理降低了16.4%、16.0%。

Study the effects of Soil Improvement on Acid Soil in the South of China

According to the problem of soil sourness in the South of China, in a pot experiment, 8 kinds of soil modifier were selected as soil improvement measures. The effects of different soil modifier on the characteristic of sorghum growth、Soil Physical Properties and Soil Chemical Properties was studied. On the basis of the interaction among sorghum, soil and modifier, discussed the mechanism of action of modifier, and revealed variation of the properties of acid soil under the action of modifier. The result indicated that the desulphurization ash modifier and the organic fertilizer had good function to the sorghum growth, Soil bulk density of acid soil which was applying humic acid, the humic acid + lime, XP2, the organic fertilizer and the desulphurization ash modifier, decreased in some degree compared with CK; But results of lime，XP1 and market modifier were opposite. After the Duncan multiple comparisons, there was significant difference between application of modifier ( except for lime treatment) and CK（P<0.05）. The soil pH with XP1 or the lime increased remarkably by 2 units compared with CK, the difference assumes the remarkable level（P＜0.05）. The employment modifier might also alleviate the acid soil aluminum poisonous harm effectively, the laterite, the red laterite lime treatment reduces 18.0%, 18.7%, XP1 processing compared to the comparison to reduce 16.4% separately, 16.0%.