生物覆盖对盐碱地的改良效果

2000～2002年的试验、示范结果表明,盐碱地生物覆盖后土壤有机质和土壤有效钾含量明显提高,耕层含盐量下降,有效地阻止了土壤水分的蒸发和散失,改善了土壤结构,熟化了土壤,培肥了地力,有利于根系的生长发育。生物覆盖田比不覆盖田一般增产21%～46%。覆盖方式和覆盖量要因地制宜,并注意选用优良品种,合理密植,种子包衣,实行平衡施肥。

Effect of Biologic Mulching to Saline-alkali Soil

The experiments in 2000～2002 show that after saline alkali soil has been mulched by organizm, the content of soil organic matter and soil avaiable potassitnn could distinctly rise, the salt content in the ploughing layer could come down and soil moisture could be effcctively prevented from evaporating and missing. It can improve soil structure and foster soil fertility. It is advantageous to the root growth and achieve good results of increasing output and income. Output can increase by 21%～46% in the biological mulching field. The mulching method and the amount of stalks should be used according to local conditions.Attention should be paid to fine varieties selection and rational close planting. Seed should be coated to prevent insect pests, and fertilizer should be applied evently. It is suitable to apply more fertilizer N and K. It is better to apply 5kg of potash sulphate and 10 kg of ammonium nitre.