1．不盲目购买“奇特品种”。对未经审定的品种只能作搭配试种或示范，不可作当家品种。近年来一些单位和个人常将刚培育出的品系以新品种的名义对外宣传，大量推销，引种后便可能会严重减产甚至绝收。如前几年引种的“超大穗小麦”全部冻死绝产，损失修重。2根据当地生产、生? 1. Do not blindly buy “exotic species.” Untested varieties can only be used with the trial or demonstration, not as a master species. In recent years, some units and individuals often cultivate the newly cultivated strains to the public in the name of new varieties and sell them in large quantities. After the introduction, they may seriously cut down or even cut off their incomes. As introduced a few years ago, “super big spike wheat” all frozen dead absolutely lost weight repair. 2 According to the local production, students?