脱硫废弃物改良盐碱土效果及对玉米生长发育的影响

Effect of Desulphurization Waste on Corn Growth and Saline-alkali Soil Improvement

采用田间试验方法,研究施用脱硫废弃物改良盐碱土及对玉米生长发育的影响。结果表明,在盐碱地中施用脱硫废弃物能够改善玉米的生长发育,即提高玉米的出苗率和和产量,以秋施15 000kg/hm2和春施7 500kg/hm2脱硫废弃物效果较明显。同时,施用脱硫废弃物种植玉米后,增加耕层土壤的总盐含量,且使盐分组成明显发生变化,SO42-、Ca2+、Mg2+增加,HCO3-、K+、Na+减少,土壤中的Na+明显降低,说明施加脱硫废弃物有利于土壤中交换性Na+的代换,从而降低Na+导致的危害;土壤pH和中微量元素无明显变化。

In this paper, the effect of desulphurization waste fertilized to the saline-alkali soil on corm growth and development and soil physical and chemical properties were studied by the method of combining field experiment. The results showed that, corn growth, including corn seedling rate and yield, was improved by desulphurization waste application, especially, more obvious effect was detected in the treatments of 15000 kg/hm^2 desulfurization waste application in the fall and 7500kg/hm^2 in the spring. At the same time, desulfurized waste application increased soil total salt content, and significantly changed the salt composition in the soil, that is, SO4^2- , Ca^2＋ , HCO3^-, K^＋, and Mg^2＋ in-creased, but Na^＋ waste to soil was however, soil pH in soil was significantly reduced, which illustrated that applying desulphurization helpful to exchangeable Na^＋ substitution, thereby alleviating Na^＋ caused harm; value and trace elements had no obvious changes.