Effects of Phase Change and Heat Collection Technology on Tomato Yield and Quality in Solar Greenhouse

Overwintering stubble tomatoes were used as the research object and phase change-heat collection greenhouse and conventional greenhouse were used as treatment.The effect of phase change heat collecting greenhouse on the yield and quality were researched,in order to select suitable temperature environment planting for tomato overwintering.The results showed that the lowest temperature（December,January and February）of phase change greenhouse was always higher than that of control greenhouse,and the range of change was between 0.3 ℃ and 1.5 ℃.Tomato yield increased 17.3%,organic acid decreased 3.3%-35.2% in phase-change greenhouse compared with control.Soluble solid content increased 0.2%-18.3%,vitamin C content increased 11.4%-54.2%,soluble sugar content increased 11.4%-54.2%,the amount of sugar increased 1.6%-63.9%,and the content of sugar components increased significantly,phase-change greenhouse was benetiful to improve nutrients and quality.Combining the above results,the use of phase change-heat collection greenhouse can obviously improve tomato yield,flavor and taste,improve the safety and quality of tomato,which has providing reference for winter production of protected crops.