田间检验的中心任务是保证良种的纯度。而种子的纯度是衡量种子质量的重要指标。因此.建立、健全各项种子检验制度,特别是田间检验制度很重要,对把住种子质量关,提高种子纯度有着重要的作用。一、建立亲繁制种田隔离安全检验制度。安全隔离是提高田间纯度的前提。在没有自然屏障的情况下,亲本自交系的繁殖田的隔离距离要达到500 The central task of field testing is to ensure the purity of the elite. The purity of the seeds is an important indicator of seed quality. Therefore, establishing and perfecting various seed inspection systems, especially the field inspection system, is very important and plays an important role in keeping the quality of the seeds and improving the purity of the seeds. First, the establishment of pro-farming security isolation inspection system. Safety isolation is to improve the purity of the premise. In the absence of a natural barrier, the isolation distance of the breeding field of the parental inbred line should reach 500