红壤是我国热带和亚热带地区的主要土壤资源,其宜农、宜林的荒地有3亿多亩。其中,由第四纪红粘土发育的红壤,地势平缓,土层深厚,若有灌溉水源,即可辟为水田。这是利用红壤的重要途径。红壤新辟稻田采用“肥(绿)、稻、稻”轮种制,虽对增加土壤有机质和供肥性方面有良好的效果,但其经济效益低而不稳。七十年代以来,浙江省在金、衢红 Red soils are the main soil resources in the tropical and subtropical regions of China. There are more than 300 million mu of wasteland for suitable agriculture and appropriate forests. Among them, the red soil developed by Quaternary red clay has the characteristics of gentle landform and deep soil layer. If irrigation water source is available, it can be turned into paddy field. This is an important way to use red soil. Red rice paddy fields with “fat (green), rice, rice” rotation system, although the increase of soil organic matter and for fertility has a good effect, but its low economic instability. Since the seventies, Zhejiang Province, Jin, Qu Hong