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甘薯是我国主要粮食作物之一,近年全国种植面积1亿亩,占世界总面积的60%以上。甘薯用途很广,社会需求量大,在我国国民经济中占有重要地位。目前甘薯生产水平有了很大提高,亩产量比解放初期增长一倍多,小面积高产,北方的春薯(生长期170天左右)亩产达到4500公斤左右,南方广东省的越冬薯(生长期263天)亩产达到9523公斤。但是,广大薯区单产还不高,亩产在1000公斤左右,增产
Sweet potato is one of the main grain crops in China. In recent years, its planting area has reached 100 million mu, accounting for more than 60% of the total area in the world. Sweet potato uses a wide range of social needs, occupy an important position in our national economy. At present, the production level of sweet potato has been greatly improved. The output of mu per mu has more than doubled in the early liberation period and the output of small-area is high. The output of spring potato in northern China (about 170 days growing season) is about 4,500 kg per mu. Period 263 days) per mu to 9523 kilograms. However, the yield in the vast potato areas is still not high, and the output per mu is about 1,000 kg