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河北省卢龙县是中国甘薯之乡,甘薯是我县主栽作物,同时也是经济作物,具有适应性强,易栽培、好管理、种植效益高等特点。甘薯的生产加工已成为农民增收致富的重要途径。长期以来,为提高甘薯单产,广大科技人员进行了积极探讨。实践证明,甘薯采取地膜覆盖栽培是一项突破性增产技术措施,一般可增产30%以上,鲜薯单产可提高到2500公斤以上。甘薯种植大县卢龙,每年覆膜栽培面积都在6万亩左右,增产效果十分显著。一、增产原理甘薯地膜栽培增产的主要原因,一是提早了栽秧期,一般比裸地提早20多天,由于甘薯是无限生长作物,等于延长20多天的生长期;二是由于地膜具有增温保墒作用,秧苗前期生长快,提
Lulong County, Hebei Province, is the hometown of China’s sweet potato, sweet potato is my county main crops, but also cash crops, with adaptability, easy cultivation, good management, planting and higher efficiency. The production and processing of sweet potato has become an important way for peasants to increase their income. For a long time, in order to improve sweet potato yields, the majority of scientific and technical personnel conducted a positive discussion. Practice has proved that sweet potato mulching cultivation is a breakthrough technical measures to increase production, generally increase production of more than 30%, fresh potato yield can be increased to more than 2500 kg. Lulong large sweet potato plantations, annual coating cultivation area of 60,000 acres or so, the yield effect is very significant. First, the principle of yield The main reasons for the yield-increasing sweet potato film cultivation, one early planting seedling period, generally more than 20 days earlier than the naked field, because the sweet potato is an unlimited growth of crops, equivalent to an extension of more than 20 days of growth; Second, Preservation of soil moisture, rapid growth of seedlings early, mention