关键词: 水稻, 油后直播, 品种适应性

Abstract: 【Objective】 To compare and comprehensively evaluate the tested varieties that were directly planted in the hilly area of northern Sichuan,and to select high-yield rice varieties suitable for direct seeding in this area.【Method】 With 50 varieties as test materials,the growth period and yield characteristics of each tested variety under the condition of direct seeding after harvesting rapeseed were compared the key factors affecting rice yield were studied,and a comprehensive evaluation of the tested varieties was made.【Result】 Correlation analysis showed that under the condition of direct seeding after harvesting rapeseed,the growth period had no significant correlation with yield traits,and all tested varieties could mature normally. The number of grains per panicle and 1 000-grain weight are significantly positively correlated with yield. The selection of large panicle varieties is a key to high yield.【Conclusion】 Principal component analysis showed that among the tested hybrid rice varieties,Guang 8 You 589 and other varieties performed better,and among the tested conventional rice varieties,four varieties including Yuehe silk seedlings performed better. These varieties are suitable for cultivation in the hilly areas of northern Sichuan after harvesting rapeseed.

Key words: rice, directly seeded after harvesting rapeseed, variety adaptability