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棉花薄膜覆盖营养钵育苗移栽技术已在生产上得到普遍应用,一般采用124～134厘米宽的苗床育苗,薄膜用量大,且脚苗比较高。 日本学者在番茄栽培研究中指出,适当拓宽温床,改小型温室为大型温室,缩小膜与温床表面积之比,能减少薄膜用量,并且日落后的温度下降缓慢,床内温度较高,能增强薄膜覆盖的保暖性能。1987年我们进行了拓宽棉花苗床试验,与常规苗床比较了薄膜用量、床温及棉苗素质。拓宽苗床,宽165厘米,棚架高49.5厘米,船底型支架;常规苗床,
Cotton film covered nutrition bowl seedling transplanting technology has been widely used in production, the general use of 124 ~ 134 cm wide seedbed nursery, the amount of film, and the relatively high foot. Japanese scholars pointed out in the study of tomato cultivation, broaden the hotbed appropriate to small greenhouse as a large greenhouse, shrinking the film and the ratio of the surface area of the hotbed can reduce the amount of film, and the temperature dropped slowly after sunset, the bed temperature is higher, can enhance the film Cover the thermal performance. In 1987, we carried out experiments to broaden cotton seedbed, compared with the conventional seedbed film dosage, bed temperature and cotton seedling quality. Widening seedbed, width 165 cm, scaffolding height 49.5 cm, bottom bracket; conventional seedbed,