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作物优良品种在生产过程中,随着种植代数的增加,由于机械混杂、生物学混杂等原因,纯度降低,产量下降。用何种方法才能尽快阻止或减缓这种趋势呢?这是广大农业科技工作者和农户十分关切的问题。我们想通过“三圃法”、“穗选法”和“块选法”所获得的种子进行比较试验,以确定何种方法既能保证种子纯度、延长品种使用年限,而又简捷易行、经济效益较高。
In the process of producing fine varieties of crops, with the increase of planting algebra, the purity is reduced and the yield is decreased due to the mechanical mixing and biological mixture. How can we stop or slow this trend as soon as possible? This is a matter of great concern to the majority of agricultural scientists and farmers. We want to conduct comparative experiments on the seeds obtained from the “Three Nurseries”, “Spike Selection” and “Block Selection” to determine which method can not only ensure the purity of the seeds and extend the useful life of the varieties but also be simple and convenient, High economic benefits.