甘薯是我市沿海丘陵红壤旱地区的主要粮食作物。近年来,由于增施化学氮肥使甘薯产量迅速提高,从而产生了忽视有机肥的倾向,这对甘薯的稳产和高产并不有利。为此,我们1984～1985年在新垦红壤甘薯套种绿肥基础上,又在中度熟化红壤旱地上进行绿肥、氮肥单施与配施的试验,以期为有机、无机肥配合使用提供依据。 Sweet potato is the city’s coastal hills and red arid region of the main food crops. In recent years, due to the application of chemical nitrogen fertilizer so that the rapid increase in sweet potato production, resulting in a tendency to ignore the organic fertilizer, sweet potato, stable and high yield is not beneficial. To this end, we 1984 to 1985 in the reclamation of red soil sweet potato interplanting green on the basis of medium-maturing red soil dryland on the green manure, nitrogen fertilizer alone and with the test, in order to provide a basis for the use of organic and inorganic fertilizers.