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一、生菜的生长特点生菜喜温和凉爽气候,最适生长温度为15～20C。温度过高,生长不良引起徒长,结球松散,提早拔节抽薹,影响产量和品质。因此,生菜在春秋两季栽培最佳。利用节能日光温室可以周年栽培。二、类型与品种生菜可分为三种类型,第一为结球型,又分脆叶、绵叶结球两种;第二为散叶不结球型,分绿、紫两种;第三是直立生长类型。结球型属中晚熟品种,株高16厘米,开展度为27.5×28厘米。抗病产
First, the growth characteristics of lettuce The lettuce like a mild and cool climate, the optimum growth temperature of 15 ~ 20C. Temperature is too high, poor growth caused leggy, loose knot, bolting early jointing, affecting yield and quality. Therefore, lettuce is best cultivated in spring and autumn. The use of energy-saving greenhouse can be cultivated annual. Second, the type and variety of Lettuce can be divided into three types, the first for the ball-type, sub-divided crisp leaves, two-tiered ball; the second is the non-spherical type of lobes, green, purple two; Third, the type of erect growth. Knot is a medium-late-maturing varieties, height 16 cm, the degree of 27.5 × 28 cm. Disease-resistant production