一、育苗地的选择及整地三七的育苗地宜选择地势较高,排水良好,向南或向东南的缓坡地,土质以疏松肥沃的砂壤土为好。生荒地应在3～4月间深翻30厘米;熟地在前造作物收获后即行翻地。以后每月犁耙一次,使土壤风化,在翻地的同时将地内杂草、石块拾除干净。在最后一次翻地前,在地面上铺一层干杂草进行烧土,以杀死表土层的病虫害,加速土壤风化,提高土壤肥力。如不烧土可结合整地,每亩用1公斤五氯硝基苯或30％菲醌15～20公斤进行土 First, the choice of nursery and land preparation 37 breeding nursery should choose a high-lying, well-drained, south or southeast gentle slope, the soil to loose and fertile sandy loam as well. Wasteland should be deep in the 3 to 4 months, 30 cm; Rehmannia harvest in the former made that line. After a rake once a month, so that the soil weathering, while turning to the ground weeds, stones removed clean. Prior to the last landfill, weeds are laid on the ground with a layer of weeds to kill pests and diseases in the topsoil, accelerate the weathering of the soil and increase soil fertility. If not burning can be combined with site preparation, per acre with 1 kg of pentachloronitrobenzene or 30% of phenanthrenequinone 15 to 20 kg of soil