论文部分内容阅读
温度调控是越冬黄瓜栽培的关键措施。一般认为,黄瓜的最适生长温度为25～30℃,超过35℃黄瓜光合作用不良,超过46℃植株出现高温障碍;低于10℃黄瓜果实停滞生长,4～5℃对植株生长有不良影响,经过低温锻练的幼苗可以忍耐2～3℃低温。上述黄瓜对温度的要求为恒温条件下的试验结果,无论是保护地黄瓜还是露地栽培均是在变温条件下进行,故不能完全按上述指标进行温度调控。试验证明,在积温相同条件下,昼夜有一定温差,黄瓜生长良好。一般昼温25～30℃或再高些,夜温13～15℃,昼夜温差10～17℃较适宜。夜温低可以减少呼吸消耗,防止徒长,
Temperature regulation is the key measure of winter cucumber cultivation. It is generally believed that the optimal cucumber growth temperature is 25 ~ 30 ℃, cucumber photosynthesis of more than 35 ℃ poor, over 46 ℃ plants appear high temperature obstacles; below 10 ℃ cucumber fruit stagnation growth, 4 ~ 5 ℃ have an adverse effect on plant growth After low temperature training of seedlings can tolerate 2 ~ 3 ℃ low temperature. The cucumber temperature requirements for the test results under constant temperature conditions, either cucumber or open field cultivation are carried out under variable temperature conditions, it can not be completely controlled by the above indicators temperature. Test proved that, in the same temperature conditions, there is a certain temperature difference between day and night, cucumber growth well. General daytime temperature of 25 ~ 30 ℃ or higher, night temperature 13 ~ 15 ℃, temperature difference between day and night 10 ~ 17 ℃ more appropriate. Low night temperature can reduce respiratory consumption, prevent leggy,