Abstract:

In this paper, 9 hybrid japonica rice materials are planted in Harbin ecotope cultivation ,which Tianjin sub-centers of China National Hybrid Rice Technology Center supplys. Through the hybrid japonica rice's phenological phase, the growth investigation, the indoor test plant and estimation and so on to recognize initially. The hybrid japonica rice had the obvious heterosis in the cold area, compared the hybrid japonica rice with the local ordinary paddy rice variety to turn green early, divided tiller ability, much grain number and strong storage capacity quantity, has not met in the low temperature situation in this year, the output increases production closed to 30% compared to the comparison average. Through gray correlation analysis, the interrelatedness size order was: ear length x4> thousand seed weight x8> stem length x1> active accumulated temperature x3> spike number x7> maturing rate x6> root dry weight x2 > the number of seeds x5, it showed enhancement hybrid Japonica rice output should consider the big spike first, the next was increases grain of heavy, but several pair of output effects are small. It needed to strengthen the big spike in the breeding the choice. Cultivates must pay attention to seed's adaptation area, adopts enhances the temperature promotion hybrid japonica rice growth the measure.