Study on Simplified and Labor Saving Cultivation of Tobacco——Ⅳ. Effects of M-regional crop rotation on soil physical and chemical properties

Reducing labor intensity and solving continuous cropping obstacles were the purpose of this study. Application effects of M-regional crop rotation on soil physical and chemical properties were studied in tobacco production. The results showed that M-ridge increased soil moisture content by 22.60%. The soil temperature in transplanting period also increased while the temperature decreased by 10.6-2.7℃ at resettling growth stage, which was useful to avoid high-temperature obstacle. M-wide double ridge also improved soil enzyme activities and soil nutrient content, which played an important role in soil improvement.