我国丘陵山地紫色土,以四川省分布最广,约占其土地面积的70％左右。湖南,云南等省亦有一定分布,但面积较小。紫色土母质为页岩或砂岩,容易风化冲刷,保肥保水力差。这些荒山薄土,多系发展柑桔生产地区,土层浅薄,不利植株根系生长,采用爆破改土,为柑桔上山栽培创造良好的土壤条件,系发展柑桔生产,促进早期结果早期丰产的重要措施。 China’s hilly mountain purple soil, Sichuan Province is the most widely distributed, accounting for about 70% of its land area. Hunan, Yunnan and other provinces also have some distribution, but a smaller area. Purple soil for the shale or sandstone, easy to weathering erosion, Paul fat poor water retention. These barren hills and thin soils, the development of more citrus production areas, shallow soil, unfavorable plant root growth, the use of blasting to soil, citrus cultivation up to create good soil conditions, the development of citrus production, and promote the early results of early high yield Important measure