不同配比的粉煤灰和滤泥对红壤理化性质与大麦产量的影响

Effects of the mixture with different proportion of fly ash and filtered mud on red soil properties and barley yield

在2种旱地红壤上施用不同质量配比的粉煤灰和滤泥混合物,研究其对红壤改土和大麦增产的效果.结果表明:施用不同质量配比的该混合物后土壤酸性均明显减弱;速效NPK、>0.25mm微团聚体含量及比磁化率都有不同程度的提高;大麦根系重量、生物产量和经济产量均显著提高,根系重量和生物产量均随混合物中滤泥比例的提高而提高,而经济产量则以施用"20%粉煤灰+80%滤泥"的处理最高,其经济产量与其它各处理的差异均达显著或极显著水平,表明施用"20%粉煤灰+80%滤泥"混合物对供试土壤的改土和大麦的增产,效果较为显著.

By applying the mixture with different proportions of fly ash and filtered mud on two type of upland red soil, the effects of the mixture on soil properties and barley yield were studied. The results were as follows: soil acidity was reduced obviously, the contents of soil quick available NPK, >0.25 mm microaggregates and specific magnetic rate were increased in various degrees after applying the mixtures; the root weight, biomass and economic yield of barley were also obviously increased, both root weight and biomass were increased with the increase of the proportion of filtered mud in the mixture, but the economic output of '20% fly ash + 80% filtered mud' treatment reached maximum and the differences of the outputs between '20% fly ash + 80% filtered mud' treatment and other treatments were significant or extremely significant. The results showed that applying the mixture of '20% fly ash + 80% filtered mud' could improve red soil properties and increase barley yield greatly.