【摘要】 为了明确高档优质稻农香32在湘西地区的生长适应性和生产潜力,在湘西不同海拔高度(685、320 m)地区进行不同播种期(4月1日、4月8日、4月15日、4月22日和4月29日)的处理,考察海拔高度和播种期对优质稻农香32产量和品质的影响。结果表明:在高海拔地区(海拔680 m左右),农香32适宜播种期在4月1日至4月22日之间,适宜栽插密度为1.2万～1.8万蔸/667m~2,应适当提高施肥水平,防止后期早衰,同时要加强田间管理,注意防治穗颈瘟;在低海拔地区(海拔320 m左右),农香32最佳播种期在4月8日至4月15日之间,栽插密度弹性大,控制在1.0万～1.8万蔸/667m~2,通过平衡施肥、科学灌溉、综合防治病虫害,能够实现目标产量。更多还原

【Abstract】 In order to determine the growth adaptability and production potential of the high quality rice Nongxiang 32 in western Hunan,different sowing dates (April 1,8,15,22 and 29) were set in the experiments in different altitude areas (685 and 320 m).The effects of altitudes and sowing dates on the yield and quality of Nongxiang 32 were investigated.The results showed that in the high altitude area (about 680 m above sea level),the suitable planting time of Nongxiang 32 was from April 1 to April 22,and the suitable planting density was 180 000 to 270 000 plant/hm~2.It should properly improve the fertilization level to prevent premature senescence in the later stage,meanwhile strengthen the field management and pay attention to the prevention and control of ear neck blast.In the low altitude area (about 320 m above sea level),the best sowing time of Nongxiang 32 was from April 8 to April 15,and the planting density was flexibly controlled between 150 000 and 270 000 plants/hm~2.The target yield could be achieved through balanced fertilization,scientific irrigation and comprehensive pest control.更多还原