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| Studies on Cultivation Mode of East-west Ridge for Tomato Cultivation with Bags in Sliding-cover Solar Greenhouse |
| 设施园艺省部共建教育部重点实验室，沈阳农业大学园艺学院，辽宁省设施园艺重点实验室，辽宁沈阳 110161 |
| Key Laboratory of Protected Horticulture，Ministry of Education，College of Horticulture，Shenyang Agricultural University，Liaoning Province Key Laboratory of Protected Horticulture，Shenyang 110161，Liaoning，China |
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Abstract This paper studied tomato east-west ridge cultivation mode in modern slide-cover solar greenhouse by substrate bags cultivation method．Through analyzing the canopy mini-environment of tomato cultivation with different ridge direction，plants growth vigour，yield，quality，the paper discussed the factors affecting yield formation of cultivation mode with east-west ridge in solar greenhouses．Results indicated that with the same planting density，the solar radiation and air temperature in tomato canopy were higher under the east-west ridge than that under south-north ridge．There were no significant differences in stem diameter，leaf area and leaf area index and underground dry weight．The plant height under EW-4 treatment was significantly increased 13.07% than SN-3 treatment；above ground dry weight was 473.10 g，decreased 19.26% and 6.86%，respectively than that of SN-1 and SN-3 treatments．The average single fruit weight and unit area yield were all significantly higher than that of SN-1 and SN-3 treatment．The fruit soluble solid matter contents were higher than that of SN-1 and SN-3 treatments．The solar radiation on the tomato canopy of EW-1（2.2 plants · m-2）was higher，and air temperature of EW-4 was also higher among different planting densities under the east-west ridge．The plant height and LAI of EW-5（3.3 plants · m-2）were significantly higher than those of the other treatments．Leaf area and dry biomass accumulation above ground of EW-4 were greater．The dry biomass accumulation underground of EW-1 was higher than those of the others．In terms of tomato fruit yield，the average single plant yield and yield per unit area of EW-3（2.6 plants · m-2）were 3.68 kg per plant and 9.57 kg · m-2，respectively，which were significantly higher than those under the other density treatments．There were no remarkable differences in contents of soluble sugar，organic acid，VC and sugaracid ratio in tomato fruits of various treatments．The results of path analysis showed the average single fruit weight and average single plant yield had direct effects on yield per unit area．To sum up，in slide-cover solar greenhouse the yield of tomato cultivated with bag under east-west ridge was higher than that under south-north ridge；and under east-west ridge planting with 2.6 plants · m-2 density could obtain higher yield．
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Received: 21 June 2019
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