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造成蔬菜品种种性下降、混杂、退化的根本原因笔者认为有以下几点: 1 机械混杂:在良种繁育过程中,当进行种子的收获、后熟、脱粒、晾晒、贮藏、运输等作业时,没有按照良种繁育技术规程办事,操作不严,使繁育的品种内混进了其它品种的种子。此外,在不合理轮作和田间管理情况下,前作和杂草的自然脱落以及施用混有其他作物种子或杂草种子而没有经过充分腐熟的厩肥或堆
The causes of vegetable species decline, mixed, the root causes of degradation I believe the following points: 1 mechanical hybrid: seed breeding process, when the seeds of harvest, ripening, threshing, drying, storage, transportation and other operations, Did not act in accordance with the technical specifications of breeding, operation lax, breed breeds mixed into other varieties of seeds. In addition, in the case of unreasonable rotation and field management, the natural extinction of pre-crops and weeds and the application of manure or piles that have been mixed with other crop seeds or weed seeds and not fully decomposed