Ⅰ、变温管理的理论一、果菜保护地栽培的温度概念黄瓜番茄露地栽培适期在5月与7月的夏季,这个时期的夜温是夜间果菜生育适温。以此为依据,冬季保护地栽培的加温设备设定温度17～22℃。在这样环境中,黄瓜植株的节间伸长,叶片薄,表现徒长,虽可提早收瓜,但叶片黄化,发生侧枝极少,为衰老现象,植株不到两个月就死亡。达不到半年以上的连续采收。例如,果菜温室延后栽培,8月上旬播种黄瓜,6月中旬播种番茄,在它们生育盛期的夜温保持20～30℃。黄瓜播种后35天、番茄播种后70天即可收获,这是加速生长发育的缘故。因此,以早期采收为生育目的,在冬季温室内采用高夜温即可早熟,但不到一个月就采收完了。番茄、黄瓜的适温,这是概括讲法。应当根据它们的栽培方式,栽培季节来分别明 Ⅰ, the theory of variable temperature management First, the temperature concept of cultivation of fruit and vegetable conservation Cucumber tomato open field cultivation in May and July in the summer, the night temperature during the night is the fruit and vegetable reproductive temperature. Based on this, the heating equipment for cultivation in winter protected areas is set at a temperature of 17-22 ° C. In this environment, cucumber plants internode elongation, thin leaves, the performance of leggy, although early harvest, but the leaves yellow, very few side branches, is an aging phenomenon, the plants died in less than two months. Less than six months of continuous harvesting. For example, fruits and vegetables greenhouse postponed cultivation, cucumber in early August sowing, mid-June sowing tomato, during their peak growth during the night to maintain 20 ~ 30 ℃. 35 days after sowing cucumber, 70 days after sowing tomato can be harvested, which is to accelerate the growth and development of sake. Therefore, with early harvesting for reproductive purposes, high night-temperature temperatures can be used to prematurely harvest in the winter greenhouse, but harvesting takes less than a month. Tomato, cucumber temperature, this is a general statement. Should be based on their cultivation methods, cultivation season to distinguish