论文部分内容阅读
从水稻的生理需水来说,分蘖末期至幼穗分化期是不需要水层的时期。正确确定这一时期,及时进行停水晒田,既能控制无效分蘖,促进水稻增产,又能达到节约用水之目的。 利用水稻的分蘖数确定停水晒田日期 利用分蘖数确定停水晒田日期,必须得知有效分蘖终止的日期。这一日期是指分蘖数相当于成熟时的最后穗数的时期,而在此后分长出的植株,可以全部看作是无效分蘖。在绝大多数的情况下,这个时期出现在最高分蘖期前10天左右。查找这个时期的方法,是将每3日水稻的分蘖数值,点绘在方格纸上,从最后确定穗数M点作平行于横坐标
From the physiological water requirement of rice, the late tillering stage to panicle differentiation stage is a period that does not require water layer. Correctly determine this period, timely watering Sha Tin, both to control ineffective tillers, to promote rice yield, but also to achieve the purpose of saving water. Use of tillers to determine the number of tilted days Shading date The number of tillers used to determine the sunning date, you must know the effective date of tiller termination. This date refers to the period at which the tiller number corresponds to the last panicle at the time of maturity, and the plants grown thereafter can all be regarded as ineffective tillers. In the vast majority of cases, this period occurred at around 10 days before the highest tillering stage. The way to find this period is to plot the tiller number of rice every 3 days on graph paper, and to determine the number of spike M from the point of parallel to the abscissa