１缺硼的主要症状 新叶呈水渍状黄色斑点，叶畸形；老叶呈古铜色，叶片卷、变脆，严重缺硼时叶片变黄，叶中脉和侧脉肿大，甚至爆裂。畸形花、露柱花多，花质差，落花严重，授粉受精不良，着果率低下。幼果多畸形，果皮有瘤状突起，常伴有褐色流胶，落果严重。有的果柄破裂明显 The main symptoms of a lack of boron New leaves showed water stains yellow spots, leaf deformities; old leaves were bronze, leaf roll, brittle, severe lack of boron when the leaves turn yellow, midrib and lateral veins swollen, or even burst. Deformity flower, dew column spend more, flower quality is poor, serious flower, poor pollination fertilization, fruit rate is low. Juvenile more deformities, peel tumor-like processes, often accompanied by brown plastic flow, serious fruit drop. Some stalk rupture obvious