退化土壤保护性耕作修复技术研究
Study on Conservation Tillage Remediation Techniques for Degerated Soil
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摘要: 增加蓄水保墒能力提高土壤水的利用率、增加有机质含量、改善土壤结构,是发展旱地农业最经济和有效的方法。试验以沈阳军区富裕农副业基地和老莱农副业基地为平台,采用深松耕作措施打破土壤犁底层,结果如下:深松地块与不深松地块相比,表现出明显的抗旱优势,0~20 cm土壤含水量高3.47%~4.03%,产量增加4.82%~8.54%;大豆平播密植与其它垄作比,土壤含水量高5.45%~6.76%,增产12.7%;秸秆覆盖还田,可使0~20cm表层土壤含水量增加20.5%,土壤有机质增加3.98%。Abstract: Enhancing the ability of soil water storage and preservation is the most economic and effective way to develop dryland farming, for it can increase water availability and soil organic matter and improve soil structure. Based on Fuyu and Laolai agricultural bases affiliated to Shenyang Military Regions, sub-soiling tillage was studied. Compared with unsubsoiling treatments, subsoiling tillage broke the plough hard pan and presented an obvious drought-resistant advantage. Soil water content in 0~20 cm increased 3.47%~4.03% and the yield increased 4.82%~8.54%. Compared with other ridge tilling treatments, horizontal seed dense planting raised soil water content by 5.45%~6.76% and the yield by 12.7%. Straw mulching tillage raised soil water content in 0~20 cm by 20.5%, and soil organic matter content by 3.98%.