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利用玉米秸秆造夹处理改良西辽河地区盐碱土,2年的试验结果表明:物理性状的改良效果不甚明显,土壤的容重下降了0.01~0.05 g cm-3,土粒密度下降了0.01~0.03 g cm-3,孔隙度从原来的49.3%增加到了50.4%;化学性状的改良效果较为明显,pH值总体上下降了1.0~1.5个单位,土壤养分增加,阳离子和阴离子含量降低,含盐量明显下降。其中,以秸秆用量为6 kg m-2、掩埋深度为10 cm的处理组合改良效果最为显著,土壤的有机质增加了57.9%,碱解氮增加了132.5%,速效磷增加了215.4%;盐碱土全盐量降低1.985 g kg-1,脱盐率达到57.5%,土壤溶液中Na+下降了39.6%,碱化度下降了32.3%,pH值下降1.5个单位;裸燕麦的出苗率增加了39.6%,发黄率下降了65.9%,产量达到228.4 g m-2,与对照相比,差异均达极显著水平。
Two years experiment results showed that the improvement effect of physical properties was not obvious, the bulk density of soil decreased by 0.01-0.05 g cm-3, and the density of soil particles decreased by 0.01-0.03 g cm-3. The porosity increased from 49.3% to 50.4%. The improvement of chemical properties was obvious. The pH decreased by 1.0-1.5 units as a whole. Soil nutrients increased, the contents of cation and anion decreased, Significant decline. Among them, the treatment with 6 kg m-2 straw and 10 cm buried depth had the most significant improvement effect. The organic matter content in soil increased 57.9%, that of available nitrogen increased 132.5% and that of available phosphorus increased 215.4% The total salt content decreased by 1.985 g kg-1, the desalination rate reached 57.5%, the soil Na + decreased by 39.6%, the alkalinity decreased by 32.3% and the pH value decreased by 1.5 units. The seedling emergence rate of naked oats increased by 39.6% The yellowing rate decreased by 65.9% and the yield reached 228.4 g m-2, which were all significantly different compared with the control.