近年来，丰宁满族自治县群众在接坝的高寒山区开发种稻获成功，使种稻区向北推移近100公里。自1989年至1996年稻田面积已发展到5000余亩，平均单产430公斤，比当地种植常规作物亩增收300元。总结他们的种植经验是：一、早育秧由于这一地区无霜期短、积温低，所以适当提早育秧适 In recent years, the masses of Fengning Manchu Autonomous County have succeeded in developing paddy rice in the alpine mountainous areas of the dam, pushing the paddy rice area northward for nearly 100 kilometers. From 1989 to 1996, the area of ​​paddy field has been developed to more than 5,000 mu with an average yield of 430 kilograms, which is 300 yuan more than that of the conventional crop planted locally. Summary of their planting experience is: First, early nursery because of the frost-free period in this area is short, low accumulated temperature, so appropriate early nursery