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广西石灰性水稻土广泛分布于桂东北、桂中、桂西、桂西南的石灰岩地区,面积约264万亩,占水田总面积10.6%桂林地区有83万亩,占全地区水田面积25.4%。该类土壤碱性,碳酸钙含量较高,结构性差,土层板结,在犁底层形成板结层或锅巴层,潜在养分少,有效养分低,水稻生长不良,产量低,一般年亩产500—600斤。利用改良提高这类土壤的生产力,对发展粮食生产,振兴广西经济有着重要意义。一、石灰性水稻土的分布、形成和类型
Guangxi calcareous paddy soil is widely distributed in the limestone areas of northeast Guangxi, Guangxi, Guangxi and Guangxi. It covers an area of about 264 mu, accounting for 10.6% of the paddy field and 83 million mu in Guilin, accounting for 25.4% of the paddy field in the entire region. Such soil alkaline, calcium carbonate content is higher, the structure is poor, soil layer compaction, the plow to form the bottom layer or layer of pot noodles, low potential nutrients, low effective nutrients, poor rice growth, low yield, the average annual yield of 500- 600 pounds. To improve and improve the productivity of such soils is of great significance to the development of grain production and the revitalization of Guangxi’s economy. First, the distribution of calcareous paddy soil, formation and type