【摘要】 为了研究水稻机插秧栽培的生育特性及最适追肥时间,以益阳市主栽水稻品种湘早籼45号为材料,研究了机插秧移栽不同追肥时间,以及机插栽培与抛秧栽培和洗插秧栽培方式对水稻生育期、农艺性状和产量等的影响。结果表明:与抛秧和洗插秧相比,机插秧的生育期缩短了2~6 d;株高较高,水稻分蘖率提高了12.3~23.2个百分点;产量提高了39.36和42.43 kg/667m2,但总粒数和实粒数减少了10粒/穗左右。同时,研究还表明,在机插秧移栽后第8天追肥最为适宜,其产量达479.09 kg/667m2,比其他追肥的时间的产量提高了24.43和48.19 kg/667m2。更多还原

【Abstract】 In order to study growing characteristics of machine-transplanted rice seedlings and the optimum time for top-dressing, Xiangzaoxian No.45 which is the main rice cultivar in Yiyang city was taken as the material to study the influences of different top-dressing time after transplanting and different culture methods(machine-transplanting, seedling-throwing and traditional transplanting) on growth period, agricultural characteristics and yield of rice. The results showed that in comparison with the seedling-throwing method and the traditional transplanting method, the machine-transplanting method can shorten the growth period by 2~6 d; the plant height was relatively high, and the tillering rate increased by 12.3~23.2 percentage points; the yield increased by 590.4 kg/hm2 and 636.45 kg/hm2, respectively, but the total grain number and the filled grain number reduced by 10 grains/panicle. Moreover, the research indicated that the optimum time for top-dressing is the 8th day after transplanting, and the yield can reach 7 186.35 kg/hm2, which respectively increased by 366.45 kg/hm2 and 722.85 kg/hm2 in comparison with the other time for top-dressing.更多还原