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水稻是需肥较多的作物,在栽培过程中,必须掌握其生育规律,特别是群体叶色“黑、黄”变化规律。因为叶色是反映稻体碳氮代谢水平最敏感的形态指标,叶色深浅标志着各部营养器官的生长状况,高产水稻一生,一般应有规律出现叶色“黑、黄”变化,该黑的时候,苗色深;该黄的时候,苗色落黄,这种稻苗生长正常,产量就高。因此,水稻黑、黄变化是确定肥水管理措施的一个重要依据。
Rice is a fertilizer that requires more fertilizer. During the cultivation process, the law of reproduction must be mastered. In particular, the variation of the leaf color “black and yellow” is observed. Leaf color is the most sensitive morphological index to reflect the level of carbon and nitrogen metabolism in rice plants. The leaf color and shade indicate the growth status of vegetative organs in each department. In high-yielding rice, the leaf color “black and yellow” should generally change regularly. When the seedling deep; the yellow, the seedling yellow, the normal growth of rice seedlings, the yield is high. Therefore, the change of rice black and yellow is an important basis for determining fertilizer and water management measures.