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采用玉米室内盆栽实验的方法,研究了内蒙古包头市西部盐碱土壤在施用以玉米秸秆和污泥为原料制备的生物炭、脱硫石膏及其混合物等不同土壤改良剂对土壤基本理化性质及玉米生长的影响。研究结果表明:单独施用生物炭能够显著提高土壤中养分含量,虽然随着玉米的生长,对土壤养分大量吸收,土壤养分略有降低,但土壤养分仍远远高于未经任何处理的盐碱土壤养分含量;单独施加脱硫石膏对降低土壤碱度、盐度有显著效果,施用脱硫石膏后土壤pH呈下降趋势(0~80 d),pH最多降低了0.74个单位,且脱硫石膏具有较好的脱盐作用,种植玉米后土壤中溶解性盐含量分别降低了22.55%、25.60%、33.74%、44.07%、45.41%。生物炭和脱硫石膏混合物对土壤的影响,既在一定程度上降低了土壤盐、碱度,又提高了土壤中养分含量,且对玉米生长具有促进作用,能提高玉米生物量。
In this study, the effects of different soil amendments such as biochar, desulphurization gypsum and their mixture prepared from corn stalks and sludge on the basic physical and chemical properties and corn growth of saline soil in the west of Baotou, Inner Mongolia, were studied by pot experiment in corn. Impact. The results showed that biochar alone could significantly increase soil nutrient content. Although soil nutrients were slightly reduced with the growth of maize, soil nutrients were still slightly lower than those without any treatments Soil desulfurization gypsum alone had significant effect on reducing soil alkalinity and salinity. Soil pH decreased after application of desulfurized gypsum (0-80 d), pH decreased by 0.74 unit, and desulfurized gypsum had better Desalination, the content of soluble salt in soils after planting corn decreased by 22.55%, 25.60%, 33.74%, 44.07% and 45.41% respectively. The effect of biochar and gypsum mixture on soil can not only reduce soil salt and alkalinity to a certain extent, but also increase soil nutrient content, promote the growth of maize and increase maize biomass.