江西红壤性水稻土肥力特性及其管理

Fertilizer Characters and Management of Red Soil in Jiangxi

江西红壤性水稻土为２０２．８８２７万ｈｍ２。其肥力特征：１．土壤三要素营养不平衡，中低产田占７０．００％；２．缺硼钼少硅硫锌，影响土壤养分平衡；３．灌溉水能提供稍多Ｃａ、Ｍｇ，少量Ｓ、Ｓｉ、Ｋ、Ｎ，以补充土壤养分不足；４．耕层浅薄，障碍因素较多。管理：１．深耕培肥，增加土壤有机质；２．坚持有机无机肥配合，提高稻田肥力；３．合理施肥，协调养分平衡；４．开沟排水、搞好稻田沟系建设；５．水旱轮作、改革耕作制度。

There are 2 028 827 ha of red soil with these fertilizer characters: 1. Middle yield and low-yield flied account for 70% in total with no balance of three basic elements of soil. 2. Nutrient balance was impaired for being lack of B,Mo and short of Si, S and Zn. 3. A little more Ca, Mg and a little S, Si, K, N can be supplemented for nutrient inadequency by irrigation water. 4. Plough layer is thin with much hindering elements. Management:1. Deeply plough and fertilizer so as to increase the content of organic matter in soil. 2. Apply both organic and inorganic fertilizer in order to build up fertilizer of the field. 3. Fertilizer rationally for the nutrien balance. 4. Furrow for drainge so as to improve ditch watering system.5. Practice rotation cropping of dry and watering farming and reform cropping system.