栽培方式对粳型巨胚稻干物质积累和产量的影响

为了研究不同栽培方式对粳型巨胚稻各器官干物质积累动态及产量构成的影响，用粳型巨胚稻新品系‘西巨胚1号’为试验对象，以常规粳稻‘合系22-2’作对照。采用淹水、旱种和垄畦3种栽培方式进行种植，大田的移栽规格为(20+14) cm × 14 cm宽窄行双行种植，每穴种2苗，采用随机区组设计，3次重复。详细记载生育进程；于孕穗期、齐穗期和成熟期每个处理取4穴测定其叶面积和干物质重；成熟后，每处理取10穴考种测其产量性状，全小区收割计产。结果表明，3种栽培方式中，垄畦栽培下巨胚稻植株的分蘖增多，茎叶干物质积累较多，有利于构建早期高产群体；生育后期延长了叶片的寿命，提高了干物质运转率，有效穗和穗粒数显著增加，从而提高了稻谷产量。因此，在巨胚稻生产中建议采用垄畦栽培以提高物质积累和运转和获得最大产量。

Effects of Cultivation Regimes on Dry Matter Accumulation and Grain Yield in Japonica Giant Embryo Rice

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 in early stage. 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 its translocation and obtained the highest grain yield.