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Journal of Agriculture ›› 2017, Vol. 7 ›› Issue (3): 31-36.doi: 10.11923/j.issn.2095-4050.cjas16100001

Special Issue: 农业工程 园艺

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Effects of Cropping Systems on Chemical Properties of Protected Soils Cultivated with Strawberry (Fragaria × ananassa Duch.)

  

  • Received:2016-10-01 Revised:2016-11-07 Accepted:2016-11-24 Online:2017-03-27 Published:2017-03-27

Abstract: (Objective) In order to understand the characteristics of soils with long-term cultivation of strawberry and their relationships with two different cropping systems, (Method) typical soil samples were collected from farm with strawberry-rice rotation or strawberry-vegetable rotation in Zhejiang province. Chemical properties, including total nitrogen, available phosphorus, available potassium, exchangeable calcium and magnesium, pH, and electrical conductivity, of the soils from the two cropping systems were measured and compared. (Result)The results showed that electrical conductivity of the soils were generally low, suggesting no obvious salt accumulation in the soils. In contrast, acidification of the soils was significant. Organic matter in the soils was mainly at the low-medium levels with an average of 23.9 g/kg. Nitrogen in the soils was generally high with an average of 1.5 g/kg. Available phosphorus accumulated significantly in the soils, its averaged concentration was 122.9 mg/kg. Available potassium in the soils was at a medium level, with an average of 122.9 mg/kg. Exchangeable calcium was at a high level with an average of 1235.5 mg/kg, and exchangeable magnesium was at a low level with an average of 72 mg/kg. Significant differences were observed in the chemical properties of the soils between strawberry-rice and strawberry-vegetable cropping systems. Electrical conductivity, organic matter, total nitrogen, available phosphorus and available potassium in the soils of strawberry-rice cropping system were 106.5μS/m, 3.4 g/kg, 0.6 g/kg, 128.7 mg/kg, and 137.0 mg/kg respectively, which were lower than those of strawberry-vegetable cropping system. But the soil pH value of the former was 0.1 units higher than the latter. (Conclusion)It was concluded that the strawberry-rice cropping system was helpful to relieve the acidification of the soils cultivated with strawberry due to long-term excessive application of chemical fertilizers, and to reduce excessive accumulation of nitrogen and phosphorus in the soils.