Relationships among cucumber stem, leaf growing and total effective temperature in self-controlled greenhouse

Relationships among Holland cucumber stem, leaf growing and greenhouse climatic environment were studied. Results showed that total effective temperature of 12～25℃ was the important factor which had closest relations with growing process of cucumber stem and leaves. Stem and leaves growing was non-linear to temperature, 13 to 19 episode locality leaves requires least accumulated temperature which was less than half of field planting to 5th-leaf stage. The growth of a piece of leaf only requires 10.6～10.9℃,others 29.1℃ for field planting to 5th-leaf stage,15.3℃ for 5th to 10th-leaf stage,11.3℃ for 10th to 15th-leaf stage,10.82℃ for 15th to 20th-leaf stage,12.9℃for 20th to 15th-leaf stage. Each growth and development periods required almost invariable total effective temperature. Under Shanghai climatic conditions,temperature changed method was suggested to increase yield and decrease costs in greenhouse cucumber production.