青花菜,俗称绿菜花、嫩茎花椰菜,是十字花科野生甘蓝的一个变种,原产于地中海东部。我国是在1981年引入并开始栽培的,几年来,各地试种试销情况表明:青花菜是很有推广价值的蔬菜,其产品颜色碧绿,烹调后食味鲜嫩,尤其是维生素A、K及铁、磷、钙等元素的含量均非常高。现将栽培技术介绍如下: 一、培育壮苗 1.育苗方式及播种期春季育苗一般在温室和塑料大棚内进行。夏季育苗则通常在冷床进行,还要利用寒冷纱进行遮光降温处理。播种期的选定,是按照花蕾肥大盛期适温(15～18℃)的时间看,北京地区在5月中下旬,由此前推80天即在2月下旬。寒 Broccoli, commonly known as green cauliflower, broccoli, is a variant of the cruciferous wild cabbage, native to the eastern Mediterranean. Our country was introduced and started to cultivate in 1981. Over the past few years, the situation of tryout and sales in various places showed that: broccoli is a valuable vegetable with green color and fresh taste after cooking, especially vitamins A, K and iron, Phosphorus, calcium and other elements of the content is very high. The cultivation techniques are introduced as follows: First, nurturing strong seedlings 1. Seedling and sowing seeding spring seedling generally in greenhouse and plastic greenhouse. Summer nursery is usually carried out in the cooling bed, but also the use of cold yarn shading cooling treatment. Selection of sowing date is based on bud blooming period suitable temperature (15 ~ 18 ℃) of time, Beijing in late May, which pushed 80 days in late February. cold