水稻机插秧栽培的生育特性及最适追肥时间的研究  

Growing Characteristics of Machine-transplanted Rice Seedlings and the Optimum Time for Top-dressing

作　　者：舒畅[1] 唐春江 汤洪[1] 杨通洲[1] 彭念军[1] 

机构地区：[1]益阳市农业科学研究所,湖南益阳413046 [2]益阳市农业局,湖南益阳413000

出　　处：《湖南农业科学》2014年第2期34-36,共3页Hunan Agricultural Sciences

基　　金：益阳市水稻机插秧配套技术推广项目(206469-2013)

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。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.

关 键 词：水稻 机插秧 追肥 产量 

分 类 号：S511[农业科学—作物学]