桔梗系多年生草本植物,高30～90厘米。根供药用,有清热、止咳、化痰等功能。我省大部分地区有野生桔梗,近几年由于药用量大,供不应求,从1980年开始人工种植。桔梗生长在温暖向阳、土层深厚、排水良好、土质肥沃的砂壤土或壤土上。准备种桔梗的地要进行秋翻或春翻。桔梗春播和夏播均可。春播在清明前后,夏播在7月份。将地翻5～6寸以上,整平耙细,做成3～3.6尺宽的平畦或打成1.6尺行距的垄。用铁耙子把土搂起。把种子和细沙混匀(每亩地用种1.5斤),均匀地撒布在畦面或垅上,用脚普遍踩一下畦面或垅面,覆1～2分厚的细沙,灌透水,播后经 Campanulaceae perennial herb, high 30 to 90 cm. Root for medicinal purposes, there are heat, cough, phlegm and other functions. In most parts of our province have wild bellflower, in recent years due to the large amount of medicine, in short supply, from 1980 began artificial cultivation. Campanulaceae grows in warm sunny, deep soil, well-drained, fertile sandy loam or loamy soil. Prepare the kind of Campanulaceae for autumn turn or spring turn. Platycodon spring and summer broadcast can be. Spring broadcast before and after the Ching Ming, summer broadcast in July. Will turn to more than 5 to 6 inches, leveling rake thin, made of 3 ~ 3.6 feet wide flat or labeled as 1.6 feet spacing of the ridge. Rake the soil with an iron rake. Mix the seeds and fine sand (1.5 kg per mu) and spread evenly on the noodles or noodles. Put the noodles or noodles together with your feet and cover the fine sand with thickness of 1 to 2 minutes. After sowing