油菜在生长期为啥会长紫叶近年来，我省中南部地区种植的油菜，常常出现叶片发紫的现象，严重地影响了油菜的商品质量。据调查，油菜在生长期出现紫叶，其原因一是缺磷，二是缺硼。但两者在症状的表现上不一。一般缺磷的主要症状为：秧苗期生长缓慢，叶片明显减少，叶厚而... Rape in the growing stage why the president purple leaves In recent years, the rapeseed planted in central and southern parts of our province, often appear purple leaves phenomenon, seriously affecting the quality of rapeseed products. According to the survey, rape appears purple leaves in the growing season, the first reason is lack of phosphorus, and second, lack of boron. But both show different symptoms. The main symptoms of phosphorus deficiency in general: slow growth of seedlings, leaves significantly reduced, thick leaves and ...