一忌来源不清的种子。只有选用正规科研生产单位育成并经良种繁育基地生产的种子才可靠。二忌未审定的品种。未经审定命名的种子正处在试验期,其丰产性状不一定稳定,优缺点有待于观察,选这类种子风险很大。三忌跨界购种。每品种都有地域性,因各地区的气候、土壤等栽培条件不一样,所以来经引种试验的种子不能盲目选用。四忌购选未经检疫的种子。未经检疫的种子容 Avoid sources of unclear seeds. Only the selection of formal scientific research and production units bred and seed breeding base production is reliable. Second, avoid the untested varieties. Untested seeds are in the trial period, the high yield traits are not necessarily stable, the advantages and disadvantages to be observed, the risk of such seeds is very large. Three avoid shopping cross-border. Each species has a regional, because the climate, soil and other cultivation conditions are not the same, so to introduce the test of seeds can not be blindly selected. Four avoid purchasing quarantine seeds. Unqualified seeds