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(一)前言 讨论或考虑有关水稻品种的选择及其栽培时,颇多具有相对的情况。例如从环境条件上考虑优良品种,在东北寒冷地带必具有耐寒性,在病害发生多的地带,须有耐病性是理所当然的。虽同为中熟稻,东北的中熟稻与九州的中熟稻,在生育日数及其他特性上很有差异,东北作为晚熟种的陆羽132号,则在关东已成为早熟种了。就插秧期言,东北与北陆地方普遍在6月上旬,但在九州则嫌太早。北陆的肥沃地采用每坪(1坪=3.3平方米)约40株的栽植密度,但在寒地或瘠地则采用2倍甚至3倍的栽植密度。
(I) Preface There are quite a number of relative situations when discussing or considering the selection of rice varieties and their cultivation. For example, consider the fine varieties from the environmental conditions, the cold in the northeastern region will have cold tolerance, in areas where disease occurs, it is natural to have disease resistance. Although both medium-maturing rice, medium-maturing rice in northeast China and medium maturity rice in Kyushu are very different in the number of birth days and other characteristics, the number of the late-maturing Luyu 132 in the northeast has become a precocious species in the Kanto region. On the transplanting date, northeast and Hokuriku generally in early June, but too early in Kyushu. Hokuriku uses a planting density of about 40 plants per pound (1 pyeong = 3.3 m 2), while 2 or 3 times the planting density in cold or barren land.