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1 生理特性南瓜为葫芦科作物,又名窝瓜、饭瓜等,原产于热带。生长适温白天25℃左右,夜间12℃左右。如白天超过30℃、夜间超过15℃,则雌花形成过迟,同时容易发生病毒病。种子发芽适温为20～25℃。 2 制种田选择南瓜根系发达,吸收能力很强,如果土壤肥力过高,则瓜秧过于繁茂,易造成落果;肥力过低,则生长受到抑制,籽粒瘪瘪,影响种子质量。因此,南瓜制种应选择肥力中等、排灌水方便、气候凉爽的地块。因南瓜杂交制种为扎花授粉,故隔离区500米即可。
1 Physiological characteristics Pumpkin Cucurbitaceae crops, also known as nest melon, melon, etc., native to the tropics. Growing temperature suitable for day and night around 25 ℃, about 12 ℃ at night. If more than 30 ℃ during the day and more than 15 ℃ at night, the formation of female flowers is too late and the virus is prone to occur. Seed germination suitable temperature is 20 ~ 25 ℃. 2 system of choice of pumpkin pumpkin roots developed, strong absorption capacity, if the soil fertility is too high, the melon seedlings too lush, easy to cause drop fruit; fertility is too low, the growth is inhibited, the kernel deflated deflated, affecting the quality of the seeds. Therefore, pumpkin seed selection should be medium fertility, irrigation and drainage of convenient, cool climate block. Because pumpkin hybrid seed for Zhahua pollination, so the isolation zone can be 500 meters.