一忌没有审定的品种未审定的种子正处在试验阶段,其特征、特性和优缺点有待进一步观察,选用这类种子带有一定的风险性。二忌越界种子不同的品种都有其一定的适宜种植范围,即区域性,甲地的良种在乙地就不一定表现为良种。因此,没有经过当地引种试验的种子,不宜盲目引种。 Avoid the untested varieties Untouched seeds are in the experimental stage, its characteristics, advantages and disadvantages of the points to be further observed, the selection of such seeds with a certain degree of risk. Second, avoid cross-border seeds of different varieties have their own suitable range of cultivation, that is, a good seed in the first place does not necessarily appear as a good seed. Therefore, without the introduction of the test of the local seed, not blindly introduced.