铁锰营养平衡与水稻生长发育

Iron-Manganese Nutrient Balance and Rice Development

通过实地考查、土培试验，对水稻“黄化病”与铁锰平衡的关系、铁锰平衡失调对水稻生长发育的影响及其调控措施进行了探讨．结果表明；水稻“黄化病”是由于土壤中过量的锰及有效铁锰比低，使水稻积累过多的标而降低活性铁含量水平，使水稻受到生理缺铁胁迫和铁锰营养平衡失调，而诱发的生理病害；铁锰平衡失调使水稻生长发育严重受阻、产量极显著降低；施用硅酸盐、石灰或叶面喷施铁后，均有利于改善水稻铁锰营养平衡，促进水稻生长发育．

By means of field observation and experiments, both the relationship between the rice chlorosis and the iron-manganese nutrient balance, the nutrient balance effects on the rice development and the nutrient balance control were studied. The results indicated as follows: the rice chlorosis is a kind of physiologic disease which was brought about by high soil Mn content and lower soil effective Fe/Mn ratios which increased significantly the rice Mn accumulation, but decreased the activitied Fe contents of the plant which brought about the physiological deficiency in iron and stressed, and iron-manganese nutrient unbalancel ② iron-manganese nutrient unbalance impeded the rice development and the yield decreased sig' nificantly;③spraying with iron, applied lime and sodium silicate were favourable to improve the iron-manganese balance and promote the rice development.