在伟大领袖毛主席“备战,备荒,为人民”战略方针的指引下,我们从71年起,开展了应用“七○二”促进油菜增产的群众性科学实验,取得了一定的效果。四年来的实践证明,油菜用“七○二”沾根(或抽苔期喷施),能促进增产,是一项成本低,效果好,使用方便的农业新技术,值得大力推广。油菜秧用“七○二”沾根或在抽苔期喷施 Under the guideline of Chairman Mao, the great leader, “preparing for war, preparing for war and for the people,” we have been conducting mass scientific experiments to promote the yield increase of rapeseed since 1970 with a certain amount of effect. Four years of practice have proved that rape with “702” dip root (or bolting period), can promote the yield, is a low cost, good effect, easy to use agricultural new technology, it is worth to promote. Rape seedlings with “702 ” dip roots or spray in the bolting period