陕西烤烟区位于半干旱的黄土高原,灌溉条件差,年降水600毫米左右,多集中在7～9月。烤烟移栽和伸根期常因低温,干旱,生长延缓,贪青晚熟,致使青烟较多,上中等烟比例小。为了研究烤烟地膜栽培技术,1983年进行了本试验。一、基本情况小区试验设在合阳县甘井公社,布点试验设在千阳凤翔、歧山、永寿、彬县、白水、洛川、富县、宜川等县。还在咸阳地区彬县、淳化、三原等县设点,在宝鸡市陇县、凤翔、千阳等县设点。试点地理范围为东经107°～110°15′,北纬34°30′～36°,海拔600～1200米。土壤为中壤或轻壤黄绵土、黑垆土、塿土等,透水性良好,P H7.8～8.1,0～30厘米有机质含量0.82～1.20％,速效氮34.1～150.4 Shaanxi flue-cured tobacco area is located in semi-arid Loess Plateau, poor irrigation conditions, the annual rainfall of about 600 mm, mostly concentrated in July to September. Flue-cured tobacco transplanting and rooting often due to low temperature, drought, slow growth, late greyish green, resulting in more smoke, the proportion of small middle-sized smoke. In order to study the flue-cured tobacco film cultivation techniques, the test was carried out in 1983. First, the basic situation Community test located in Heyang County Ganjing commune, cloth test located in the Qianyang Fengxiang, Qishan, Yongshou, Binxian, Baishui, Luochuan, Fuxian, Yichuan counties. Also in Xianyang area Binxian, Chunhua, Sanyuan counties set up points in Longji, Baoji City, Fengxiang, Qianyang counties and other counties. Pilot geographic range of longitude 107 ° ~ 110 ° 15 ’, latitude 34 ° 30’ ~ 36 °, elevation 600 ~ 1200 meters. The soil is medium loam or light loess loessial soil, black loam soil, loam soil and the like. The water permeability is good, P H7.8 ~ 8.1, organic matter content of 0 ~ 30 cm is 0.82-1.20%, available nitrogen is 34.1-150.4