红壤是我国南方重要的土壤资源。七十年代初,不少地区在有水源的地方把新垦红壤辟为水田,然而在这些新垦红壤稻田上,水稻在分蘖至孕穗期间常发生黄叶现象,首先从下位叶开始发黄,逐渐向上扩展。发黄的叶片叶色从黄渐变橙黄以至橙红色,严重影响禾苗的正常生长。新垦红壤稻田 Red soil is an important soil resource in southern China. In the early 1970s, many areas turned the newly developed red beds into paddy fields in areas where there was water supply. However, in these newly cultivated red paddy fields, the yellow leaves often occurred during the tillering to booting stage. First, yellowing started from the lower leaves, Gradually expand upward. Leaf yellow leaves yellow gradient from yellow to orange-red, seriously affecting the normal growth of seedlings. New Ken red soil paddy fields