1需要掌握的三项“原则”1.1效益优先的原则在选购种子时一定要把效益放在首位,价格高的种子其质量、产量并不一定高,在选种时不应把新、特、稀品种作为首选,因为这类品种的种子往往价格高的出奇,会增加生产成本。同一类型的品种应在确保质量的 1 need to master the three “principle ” 1.1 the principle of giving priority to efficiency in the purchase of seeds must give top priority to the high price of seeds of its quality, yield is not necessarily high, the selection should not be new , Special, thin varieties as the first choice, because the seeds of these varieties often surprisingly high prices, will increase production costs. The same type of variety should ensure quality