论文部分内容阅读
我区小春油菜生产自1958年以来总面积波动在12—60万亩间,25年中有21年的平均单产徘徊在15—46斤。最高单产是1982年30万亩平均达91斤。长期低产的原因是多方面的,现仅就硼肥的增产效果小
I Xiaoqing rape production since 1958 the total area fluctuations in the 12-60 million mu of 25 years in 21 years the average yield hovering at 15-46 pounds. The highest yield in 1982 30 acres averaged 91 pounds. Long-term low yield is due to many reasons, only the effect of boron fertilizer yield is small