迴龙墟农場位于湖南省南部的江永县,属于都庞岭支脉的黄沙岭,土壤是以紅壤为主的山地丘陵紅壤黄壤复区。場內石灰岩露头較多,当地农民在水田有长期高量施用石灰的經驗,但在大面积的旱土上还没有施用石灰的习慣。我們自1963年开始着手在水田及旱土上进行石灰肥效及其用量指标的試驗,以探求其增产效益及經济合理用量指标。 Huilongxu Farm is located in Jiangyong County in the south of Hunan Province. It belongs to Huangshaling of Du Pangling branch vein. The soil is mainly composed of red soil and red soil yellow soil complex in red soil. There are more limestone outcrops in the field. Local farmers have long-term high-level lime application in paddy fields, but there is no habit of using lime on large areas. Since 1963, we have started to test the lime fertilizer efficiency and its dosage index on paddy fields and dry land so as to explore its yield-increasing benefits and economic and reasonable dosage targets.