我县从1981年开始,参加全国棉花施硼试验。根据三年来的试验示范,我县棉花程度不等地普遍出现缺硼环带,环带多少与土壤速效硼含量高低直接相关,施硼后能有效地降低叶柄环带率。(一)棉株缺硼环带的形态特征棉株叶柄环带是棉花潜在性缺硼的主要形态特征。缺硼环带呈浸润状,外观暗绿色,组织肿胀,手摸有凸起感,多数在棉株中部的果枝叶柄上发生,少数发生在主茎叶柄上,轻的只有1—2个环带或一个半圈不闭合的环带,且色 My county since 1981, to participate in the national cotton boron test. According to the experimental demonstration in the past three years, the cotton belts in our county range from boron to boron, which is directly related to the amount of available boron in the soil. After boron application, the rate of petioles can be effectively reduced. (A) cotton plant boron deficiency ring morphological characteristics Cotton plant petiole annulus is a cotton potential boron deficiency of the main morphological characteristics. Boron deficiency zone was infiltrated, dark green appearance, tissue swelling, hand touch with a sense of bulge, the majority in the middle of the cotton plant fruit petiole occurs, a few occur in the main stem petiole, light only 1-2 rings Belt or a semi-circle does not close the ring, and color