水田苗情观察、预测产量和各种栽培试验都需要考查水稻的穗部经济性状——平均每穗粒数和实粒数。按照田间取样和统计方法的要求,以每个小区取样5蔸,重复2～3次计算。用人工逐穗逐粒计数,一人一天仅能考查三、四个处理的样品,需时多,工效低。改用数粒板(200目)计数,虽可提高工效四、五倍,但仍感缓慢。 Miao paddy field observation, forecast yield and various cultivation tests need to examine the economic traits of rice panicle - the average grain number per spike and the number of real grains. In accordance with the requirements of field sampling and statistical methods, sampling 5 每 in each plot and repeating 2 or 3 times. With artificial per panicle counting, one person a day can only examine three or four processed samples, take more time, low efficiency. Use a few tablets (200 mesh) count, although the work efficiency can be increased four or five times, but still feel slow.