Study On The Selection Of Late Rice Varieties Suitable For Machine Transplanting

Take 10 late rice varieties as the research object,through the machine planting seedling quality investigations,basic seedlings survey,growth period recording,yield and its components analysis,rice quality analysis,we studied and compared seedling quality,growth process and yield formation,etc of different late rice varieties under the condition of the machine transplanting,so as to select late rice varieties suitable for machine transplanting and provide the basis for the selection of rice varieties with whole-course mechanization.The results showed that the yields of Hyou 518,Wuyou 308,Shenyou 9586,Fengyuanyou 299were 7997.25kg/hm~2,7855.80kg/hm~2,7809.00kg/hm~2 and 7807.50kg/hm~2,respectively.They were all higher than the average yields of the 10 varieties,which were7201.95kg/hm~2,and significantly higher than that of the other 5 varieties except Tianyouhuazhan.The average increased yield was 1257.49 kg/hm~2,with an average increased percentage of 19.02%.In terms of rice quality,the brown rice rate and the white rice rate of Hyou 518,Fengyuyou 299 and Wuyou 308 were more than 82%and74%,respectively.They were higher than the average brown rice rate and the average white rice rate of the 10 varieties,which were 81.4%and 72.8%,respectively.The finishing rice rate of Fengyuanyou 299,Shenyou 9586 and Wuyou 308 was 65.3%,64.8%and 64.1%,respectively,which were all higher than the average finishing rice rate of 10 varieties of59.9%,while that of Hyou 518,which was 52.7%,was lower than the average finishing rice rate of 10 varieties.H You 518 is a type of rice with both ears and grains.It has the strongest seedling quality,the most white roots(6.9),high green leaves,stem base width,total roots and dry weight of 100 plants.The plant height is the most suitable for machine planting and machine harvest(89.33cm).The growth period of H you 518 was the shortest,113d.The conclusion was that the four varieties of Hyou 518,Wuyou 308,Shenyou 9586 and Fengyuanyou 299 were all suitable for machine-transplanting cultivation,among which H-you 518 had the best performance and could be used as a reserve variety for the whole mechanized production of late rice.