一、缺硼症与喷硼示范推广情况硼是棉花生长发育所必须的微量元素肥料,在一般缺硼的情况下,常出现叶柄环带,严重缺硼时,棉苗矮化,不现蕾。据调查,我县不少棉区棉花在现蕾时都出现叶柄环带,有的公社出现成片的蕾而不花缺硼症,棉苗只现蕾不开花不结桃,群众称为“公棉花”,又叫“冬瓜棉”。过去误认为是施肥不当引起的疯长棉,常采用深中耕切根,控制施用氮肥和扯破主杆大叶等防疯长措施,但收效甚微,棉花严重减产甚至朵花不收。今年,我们在袁渡、小港、拖船、荣 First, the boron deficiency and boron spray demonstration and promotion of boron is a necessary trace element of cotton growth and development of fertilizer, in the case of general lack of boron, petioles often occur, severe boron deficiency, cotton seed dwarf, no bud . According to the survey, many counties in our county cotton buds appear in the bud when the ring zone, and some communes into a film of Lei without Bordeaux disease, cotton seedlings only budding not flowering peach, the masses called “ Male cotton ”, also known as“ winter melon cotton. ” In the past, it was mistakenly considered as crazy cotton caused by improper fertilization. It was often used to control deep-rooted cuttings, control nitrogenous fertilizer and pull off the main stem, and so on. However, the effect was insignificant and cotton was severely curtailed or even lost its weight. This year, we in Yuandu, small port, tug, Rong