1.水稻生育过程中地上部各器官干物质的增长与分布,可以明显的划分为以下四期:第一期:片的增长速度最快;第二期叶鞘增长的速度最迅速;第三期茎、穗增长速度差不多相等,快于其他各器官;第四期以穗增长的速度为最快,也是各器官干物质增长速度相距最大的时期。稻株体内所增干物质在各器官中的分布亦以此干物质增长速度大小增强和减弱其分布的比重。2.哪一个器官干物质增长的速度最快,干物质也就比较多的分布在哪一个器官,反之亦然。由此可得协调稻株各器官干物质增长的办法如下:(1)抑制某一或几个器官干物质的增长速度,即可减少其所增干物质分布的比重,而增加另一或另几个器官干物质分布的比重,从而可调整各器官干物质分布的比例关系。(2)促进某一或几个器官干物质的增长速度,亦可改变各器官所增干物质分布的比例关系,只是与以前比较,稻株各器官干物质增长的状况不同,两者结合(即既促进又抑制)调节的作用更大。(3)如果促进所有器官干物质的增长速度,即可使整个稻株干物质积累的水平提高。3.测定肥、水对稻株干物质增长、分布的影响,反映出此两种因素对稻株干物质有促进和抑制两方面的作用。试验结果指出:追施氮肥可使干物质增长速度缓慢的器官增长速度加快,所增干物质分布的比重增多,限制和过量水分供应,对 The growth and distribution of dry matter in aboveground organs during rice fertilization can be clearly divided into the following four phases: the first phase: the fastest growth of the tablet; the second rapid growth of leaf sheath; the third Stems and spikes were almost the same, faster than other organs; the earliest spike in the fourth stage was the fastest, and the dry matter growth rate of each organ was the largest. The distribution of dry matter in rice plants in various organs increases and decreases the proportion of its distribution by the growth rate of dry matter. 2. Which organ has the fastest dry matter growth and which dry matter is more distributed, and vice versa. Therefore, the following methods can be used to coordinate the growth of dry matter in various organs of rice plants: (1) to restrain the growth rate of dry matter in one or a few organs, to reduce the proportion of dry matter in their organs to be increased, Several organs of the proportion of dry matter distribution, which can adjust the proportion of dry matter distribution of various organs. (2) To promote the growth rate of dry matter in one or several organs, and to change the proportional relationship between the distribution of dry matter in various organs, except that the dry matter growth of various organs in rice plants is different from the previous situation, That is, both promote and inhibit) regulation of the role of greater. (3) If the growth rate of dry matter in all organs is promoted, the level of dry matter accumulation in the whole rice plant can be increased. The effects of fertilizer and water on the growth and distribution of dry matter of rice plants indicated that these two factors could promote and inhibit the dry matter of rice plants. The results showed that topdressing nitrogen fertilizer can accelerate the growth of organs with slow dry matter growth rate, increase the proportion of dry matter distribution, limit and excess water supply,