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据薄井胜利观察。在插秧后至出穗为止的期间内,在受到肥料余缺影响时,不论处于何种发育阶段。水稻的三枚上位叶叶片问经常发生各种不相同的叶色变化。比如,若将上三叶之中的最上一叶(应为完全展开叶)以①、中间一叶以②、最下一叶以③表示之,则肥料正在发挥肥效亦即肥料充足时,①是浓重的,其顺序为①>②>③,反之,若肥料不足时③是浓重的,其顺序为③>②>①,说明缺肥。
According to thin-well victory observation. During the period from the transplanting to the ear-cutting, no matter what stage of development is affected by the shortage of fertilizer. Rice leaves of the three upper leaves often ask a variety of leaf color changes. For example, if the uppermost leaf of the upper three leaves (which should be completely expanded leaves) is denoted by ①, the middle leaf is denoted by ② and the lowermost leaf is denoted by ③, the fertilizer is exerting fertilizer effect, that is, if the fertilizer is sufficient Is strong, the order of ①> ②> ③, on the contrary, if the lack of fertilizer ③ is heavy, the order of ③> ②> ①, indicating lack of fat.