Abstract:

For the purpose of studying the effects of different cultivation regimes on dynamics of dry matter accumulation in organs and grain yield components of ‘Japonica Xi-giant embryo-1’, the experiment studied the three different cultivation regimes of submerged irrigation, dry cultivation and ridge cultivation used ‘Japonica Xi-giant embryo-1’ as experimental materials, conventional japonica rice ‘Hexi-22-2’ as control. The transplanting size was (20+14) cm × 14 cm the seedling number two plants per hill. This experiment with randomized block design and three repeated. The results indicated that, under the ridge cultivation, the tillering and the dry matter accumulation of stems and leaves were increased, and it was beneficial to build the high-yielding population. The effective panicles number and grain number per spike were increased for delaying the senescence of leaf during late growth stage and promoting the transportation percentage of dry matter accumulation under the ridge cultivation. Finally, the grain yield was increased. Therefore, ridge cultivation was the most beneficial cultivation regimes to increase dry matter accumulation and obtained the highest grain yield.