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红壤(包括黄壤)是我省的主要土壤。除滇中楚雄一带的紫色土、高山地区的灰泡土和坝区的冲积土外,全省土地面积的百分之七十,旱地面积的一半都属于红壤。此外,还有不少面积是低产红壤性水稻土。这些土壤速效磷素养分缺乏,限制着农作物的生长发育。红壤耕地上合理施用磷肥,普遍有明显增产效果。我省磷肥矿产资源丰富,可以大量供应全省全国各地农业生产需要。深入研究红壤耕地缺少磷素养分的原因,迅速改变红壤不良性状,因地制宜把我省大量磷肥资源使用到红壤耕地上,促进农业大幅度增产,是当前急待解决的重要问题。
Red soil (including yellow soil) is the main soil in our province. Except for purple soil in the Chuxiong area of Yunnan, ash soils in alpine areas and alluvial soil in the dam area, 70% of the province’s land area and half of the dry land belongs to the red soil. In addition, there are many areas of low-yield red paddy soil. These soil available phosphorus nutrients lack, limiting the growth of crops. Red soil plow reasonable use of phosphate fertilizer, generally have obvious yield increase effect. Phosphate fertilizer mineral resources in our province is rich, can supply large quantities of agricultural production throughout the province. In-depth study of the reasons for the lack of phosphorus nutrients in red soil arable land quickly change the red bean bad traits, according to local conditions to a large number of phosphate fertilizer resources in our red soil arable land to promote a substantial increase in agriculture, is an important issue to be solved.