Study on Bed Cultivation of Grapes in Light-greenhouse
|Keywords||’Jufeng’ grapes sunlight-greenhouse bed cultivation temperature in the field berry quality|
This paper studied the bed cultivation mode and its effects of growth and development, berry quality in two-year-old ’jufeng’ grapes under the bed cultivation mode , as well as dropping irrigation and film covering in sunlight-greenhouse.The main results were as follows:1. Temperature of bed cultivation and normal cultivation in the feild changed by the room temperature in sunlight-greenhouse and the trends of them were same which showed single apex curve . Temperature of bed cultivation in the feild at 20cm-40cm was 1℃ higher than that of normal cultivation and go ahead 15 days into the most featable temperature of root growth. The daily changes of temperature at different deeps in the feild were same during the periods of grapes’ s growing. Temperature in the feild when covering and uncovering showed significant relative , Compare the range of the temperature of 10cm with room temperature in the field has showed significant relative, the time coming to the Max. and Min. also changed in order by the deep of the field .2. Covering film increases the temperature of bed cultivation in the field about 2℃ and the most of 3℃ at 20cm deep . It was the black film covering quicker to heat rising the temperature in the field , and the white film covering was better in heat preservation .3 . Dropping irrigation heatly improved the effection of rrigation to temperature in the field greatly and was good at keeping higher temperature in the field.4. Compared to that of normal cultivation , bed cultivation promotedthe root system to extend deeply, increased the quantities of all roots and root tips, improved energy of root system, accrelerated the growth of shoots and leaves. Also advanced phenological phases 2-4 days.5. Bed cultivation was better than normal cultivation in several ways such as increasing the output and the T. S. S content , improving the breey color , lightening the occurrence of Physiological Mosaic disease , improving berry quality, bed - droping irrigation cultivation and bed - film covering cultivation had the best effection .