不同改良剂对烟区土壤肥力性状及烤烟产量和质量的影响

利用一定数量的石灰、粉煤灰、白云石粉和废菌棒,配合适量化肥构成不同土壤改良剂组合,通过田间试验探讨不同改良剂对烟区土壤主要肥力性状及烤烟产量和质量的影响.结果表明,烟区土壤施用"石灰+菌棒+常规化肥"改良剂组合的改土培肥和增产效果最好,土壤pH、速效NPK、交换性Ca和Mg分别比对照增加21.33%、44.81%、63.97%、123.2%、56.70%和88.64%;土壤细菌、放线菌、磷细菌、钾细菌和纤维素分解菌数量分别比对照提高252.54%、125.00%、466.67%、129.59%和3114.29%;土壤过氧化氢酶、脲酶、磷酸酶和纤维素酶活性分别比对照提高130.77%、100.00%、110.00%和515.38%;烤烟生物产量、经济产量和上等烟数量分别比对照提高50.89%、49.18%和38.33%.

Effects of various modifiers on soil fertility properties and tobacco yields and qualities

The effects of various modifiers composed of lime, fly ash, dolomite, culture waste of edible fungi and chemical fertilizers on soil major fertility properties, tobacco yields and qualities in tobacco producing district were studied and discussed by field experiment. The results showed that the effects of applying modifier composed of lime, culture waste of edible fungi and chemical fertilizer were the best among all modifers used. After applying this modifier, soil pH, contents of quick available N, P and K, contents of exchangeable Ca and Mg were 21.33%, 44.81%, 63.97%, 123.2%, 56.70% and 88.64% higher than those of the contrast, the quantities of soil bacteria, actinomyces, phosphate-degrading bacteria, potassium silicate-degrading bacteria and cellulose-degrading bacteria increased about 252.54%, 125.00%, 466.67%, 129.59% and 3114.29%, the activities of soil peroxidase, urease, phosphatase and cellulosase raised about 130.77%, 100.00%, 110.00%and 515.38%and the biomass, economic yields and quantities of the highest class tobacco were 50.89%, 49.18% and 38.33% higher than those of the contrast respectively.