关键词: 日光温室, 土垄内嵌式基质栽培, 甜椒, 根区温度, 缓冲能力

Abstract: In order to solve the problems of low temperature stress in winter and spring, soil continuous cropping obstacle, low yield and low use rate of water resources in solar greenhouse in north China, this paper invented a new cultivation method naming “soil-ridged substrate-embedded cultivation(SSC)”. Diurnal root zone and lateral soil temperature changes of 5 different ridge types including soil ridge(SR), normal ridge(NR), short normal ridge(NRs), narrow normal ridge(NRn), and double plant density of normal ridge(NRd) were studied. The results showed that average indoor temperature, daytime temperature and nighttime temperature for continuous 5 d and night were 16.53℃, 20.44℃; and 14.12℃, 13.92℃; and 22.78℃, 10.16℃ during 2 growing period from Nov. 6~10, 2016, and Jan. 2~7, 2107. In November, the average temperature difference between day and night for 5 continuous days, and difference between the highest temperature and lowest temperature of SR were the highest, 2.04℃ and 6.06℃, respectively. While those of NRs were the lowest, 0.80℃ and 4.95℃, respectively. In January，the average temperature difference between day and night of SR was the highest, 1.18℃ and 6.24℃, respectively. While the difference between the highest temperature and lowest one of NRs (4.85℃) was the lowest; and difference between average day and night temperature of NRn (0.07℃) was the lowest. There was a very significant linear correlation between the root zone temperature and the soil temperature on the east side and west side in each ridge. The conclusion was that NR had better root zone temperature buffer capacity, and can increase the temperature of root zone at night, so NR pattern of SSC had better application prospect in vegetable production in winter and early spring season in solar greenhouse.

Key words: solar greenhouse, SSC, sweet pepper, root zone temperature, buffer capacity