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采用田间小区试验,研究了等距开槽结合施用石膏对东北松嫩平原西部苏打盐碱土的改良效果。结果表明:等距开槽(20～40cm心土层开槽,槽间距1m)能有效降低开槽点的土壤紧实度,对槽间土壤紧实度也有一定的降低作用,且与对照(不开槽)紧实度的差异达到极显著水平;等距开槽必须结合石膏才能改善土壤的化学性质,加石膏与未加石膏处理的pH和碱化度达到差异显著水平,而电导率值在处理前后差异不显著,开槽松土处理对槽内土壤化学性质改善效果不明显;磷石膏与脱硫石膏在改土效果上差异不显著,石膏配合开槽能有效改善土壤理化性质和植物生长状况,且对槽间土壤改良和植物生长均有一定的促进作用。
Field experiments were conducted to study the effect of isometric slotting combined with application of gypsum on the soda saline-alkali soil improvement in the western Songnen Plain of Northeast China. The results show that isometric slot (20 ~ 40cm slotted soil, slot spacing 1m) can effectively reduce soil compactness at the slotted point, and also reduce the compaction of soil between trenches. Compared with the control Not grooved) the compaction degree reaches the extremely significant level. The isometric slot must be combined with gypsum to improve the chemical properties of the soil. The pH and alkalization degree with or without gypsum treatment reach significant differences, while the conductivity There was no significant difference between before and after treatment. The effect of slotting and loosening on the soil chemical properties was not obvious. The difference between the effect of phosphogypsum and gypsum on soil improvement was insignificant. Gypsum with slotting could effectively improve the soil physical and chemical properties and plant growth Condition, and to the soil improvement and plant growth have a certain role in promoting.