无论板田直播油菜还是板田移栽油菜,都是地板,通透性差,草大,地湿,缺肥,易遭冻害,这些都严重影响油菜发根发棵,正常生长发育和增产增收。为了减轻上述不利因素为害,板田油菜要作到如下“四防”。一、防杂草:“板田不除草,草把苗淹了。”晚稻茬板田油菜,由于土地末 Regardless of Banda broadcast rape or transplanting rape fields, are the floor, poor permeability, grass, wet, lack of fat, vulnerable to frost damage, which have a serious impact rapeseed hair trees, normal growth and development and increase production. In order to alleviate the adverse factors of damage, Itabata rape to make the following “four defenses.” First, weed control: “Ban Tian does not weeding, grass seedlings flooded.” Late rice stubble field plate rape, because the end of the land