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1992年,蓝田县农科所在山区推广马铃薯地膜覆盖栽培2071亩,平均亩产3747.5公斤,较露地栽培亩增产2247.5公斤。1993年,该所又在10个山区和8个山外乡推广地膜马铃薯3385亩,平均亩产4091.5公斤,较露地栽培亩增产2591.5公斤。实践证明:在高寒地区用地膜覆盖栽培马铃薯是一项高产高效的农业新技术。其主要栽培措施:1.选地选茬应选择适宜马铃薯生长发育的沙质壤土、活土层深厚、土壤肥力中等的地块。要求有排灌设施,有110天以上的无霜期,且气候冷凉、昼夜温差较大的地区。2.选用异地良种马铃薯种子退化严重,切忌用当地种子,必须异地换种。地膜覆盖栽培马铃薯,宜选用生育期100天左右的中熟品种。单薯重50～150克,每亩备种薯200公斤。3.整地、施肥、起垄马铃薯用地必须是秋冬深翻30厘米以上、接纳雪雨的地块。早春解冻后亩施优质
In 1992, Lantian County, where agricultural extension of potato mulching 2071 acres of land, the average yield of 3747.5 kilograms, more acres than the open cultivation of 2247.5 kilograms. In 1993, the institute again promoted 3385 mu of mulched potato in 10 mountainous areas and 8 villages outside the mountains, with an average yield of 4,091.5 kg per mu and an increase of 2,591.5 kg compared with that under open cultivation. Practice has proved that: in the alpine region covered with plastic film cultivation of potatoes is a high yield and high efficiency of agricultural technology. The main cultivation measures: 1.Selected stubble should be selected for the growth and development of potato sandy loam, deep living soil, fertile soil mass plots. Requires irrigation and drainage facilities, frost-free period of 110 days or more, and the cold climate, large temperature difference between day and night areas. 2. Selection of off-site thoroughbred serious degeneration of potato seeds, avoid using local seeds, must be changed. Mulch mulching cultivation, should use about 100 days of maturity varieties. Single potato weight 50 ~ 150 grams, 200 kilograms of seed prepared per mu. 3. Land preparation, fertilization, Ridge potato land must be more than 30 cm in autumn and winter deep puddle to accept snow and rain. Mushi high quality after thawing in early spring