一、前言北京地区白萝卜周年生产、四季供应,生产上迫切需要抗逆性强,耐抽薹抗病高产品种。本试验目的旨在于从生产中已应用或尚未应用萝卜品种中筛选适宜北京地区反季节栽培良种,服务于郊区生产。二、材料与方法(一)参试品种１.春播露地春玉大根、四月早生、白光、大棚大根、 I. Introduction Beijing white radish annual production, supply four seasons, the urgent need for strong resistance to production, resistance to bolting disease-resistant varieties. The purpose of this experiment is to screen or select cultivars suitable for season cultivation in Beijing from radish varieties that have not been applied or yet used in production to serve suburban production. Second, materials and methods (A) test varieties 1. Spring sowing open spring jade roots, early April, white, large roots,