黄瓜通过上千年的自然选择和人工栽培，在国内形成了华南、华北两种基本生态类型（下面简称华南、华北型）。华南型黄瓜生长发育对低温短日照要求比较严格；华北型黄瓜对高温长日照感应不明显。湖南四季气候分明，春黄瓜栽培以华南型极早熟品种为主；夏、秋栽培均以华北型耐热 After thousands of years of natural selection and artificial cultivation, cucumbers formed two basic ecological types in South China and North China (hereinafter referred to as South China and North China). South China cucumber growth and development of more stringent requirements of short-term low-temperature sunshine; North-type cucumber on the long-term high-temperature induction was not obvious. Four seasons in Hunan have distinct climates. Spring cucumber cultivation is dominated by South China-type very early-maturing varieties. Both summer and autumn cultivation are North China-type heat-resistant