大棚蔬菜进行叶面追肥是一项有效的增产措施,效果相当明显。在蔬菜生长过程中,只有正确的叶面追肥才能收到良好的效果,其施用方法如下:——根据不同蔬菜种类确定喷施叶面肥的品种。叶菜类蔬菜,需要氮素较多,应以尿素、硫酸铵为主,每季喷施2～4次,以在生长前期喷施为宜。瓜果类 Greenhouse vegetable leaf top dressing is an effective stimulation measures, the effect is quite obvious. In the process of vegetable growth, only the correct leaf top dressing to receive good results, its application is as follows: - According to different types of vegetables to determine the variety of foliar spray. Leafy vegetables, need more nitrogen, should be urea, ammonium sulfate-based, spray 2 to 4 times a quarter to spraying in the pre-growth stage is appropriate. Fruits and vegetables