一般水稻田里的稻根呈棕色,而在土色灰白的“白鳝泥”水田中,稻根为白色。白色稻根吸收力弱,生长期中植株“退膘”(又叫翻秋、坐蔸),并易感染胡麻叶斑病,最后甚至根成黑色,植株枯萎。据分折稻根呈棕色的道理,是土壤中的氧化铁包被在稻根表面,土壤中的铁质含得愈多(如紫色土)根上的棕色也愈浓,它具有很强的 The rice roots in the general rice fields are brown, while in the pale gray “eel mud” paddy fields, the rice roots are white. White rice root absorption is weak, the growing plant “retreat 膘 ” (also known as turning the autumn, sitting 蔸), and susceptible to flax leaf spot, and finally even into a black, plants withered. According to the subdivision of brown rice root is the reason that iron oxide in the soil is coated on the rice root surface, the soil iron content more (such as purple soil), the root of the brown is also thicker, it has a strong