早稻早发是争取早稻早熟、增产的重要关键。而返青则是早发的标志,也是早发的开端。提早返青以利秧苗迅速扎根及早转入正常生长。目前在农业生产上对返青的标准很多,认识上也颇不一致,特别是广大农民群众对稻苗返青有许多灵活而形象的指标。有人认为稻苗移植后叶色变青,即为返青;另一些人认为稻 Early rice is an early fight for early maturing rice, an important key to yield. The return of youth is a sign of early onset, but also the beginning of the early onset. Early greening to facilitate rapid rooting of saplings into normal growth. At present, there are many standards for turning green in agricultural production and their understanding is quite inconsistent. In particular, the masses of peasants have many flexible and vivid indicators of returning rice to plantation. Some people think that after transplanting rice leaf color green, that is green; others think of rice