砂姜黑土是驻马店地区的主要中低产土壤 ,占全区耕地面积的 32 .7%。砂姜黑土的主要特点是质地粘重 ,耕性差 ,土壤肥力低 ,易旱易涝。粉煤灰磁化复合肥 (以下简称磁化肥 )是将粉煤灰充磁后与氮、磷、钾肥混合生产的一种新型复合肥 ,它不仅具有较高的肥效 ,而且还具有改善土壤物 Shajiang black soil is the main middle and low yielding soil in Zhumadian area, accounting for 32.7% of the cultivated area of ​​the whole area. Shajiang black soil is characterized by the main sticky texture, poor tillage, low soil fertility, drought and easy floods. Magnetized fly ash compound fertilizer (hereinafter referred to as magnetic fertilizer) is the fly ash magnetized with nitrogen, phosphorus and potassium fertilizer produced a new type of compound fertilizer, which not only has high fertilizer efficiency, but also has improved soil