Effects of Different Planting Years on Physicochemical Properties and Enzyme Activities in Soil of Rice-Cherry Tomato Rotation

Crop rotation periodicity has always been one of the research focuses currently. In this study, physicochemical properties, nutrient contents and enzyme activities were investigated in soils from rice-cherry tomato for year (1a), three years (3a), five (5a), seven (7a) ten (10a), respectively. The major objective was to analyze optimal soil perspective, so as provide theoretical basis effectively avoiding continuous cropping obstacles cherry via studying response characteristics planting system. results follows: 1) Soil pH value increased by during 1a 5a, reached highest 5.32 at 5a. However, acidity sharply enhanced 7a 10a (P P •kg-1 3) content available phosphorus with increasing crop years, 110% 173% 3a < 0.05). conclusion, long-term single pattern would aggravate acidification, prompt imbalance reduce activity. 5a be appropriate period tomato, or else it quality, resulting a new obstacle tomato.