摘要
依据Kira的温暖指数、寒冷指数和徐文铎的湿度指数公式,研究辽宁水杉的分布与水分和热量之间的关系.结果表明:水杉温暖指数WI最适范围在80.60～94.75℃.月之内;寒冷指数CI最适范围-64.22～-37.45℃.月之内;湿度指数HI最适范围在6.91～12.46 mm/(℃.月)之内.水杉属于温暖性湿润树种,在保证土壤水分和空气湿度的条件下,还可进一步向北移.但由于光照、年积温的限制,生长速度会受到进一步限制.
The relationship between cultivated distribution of Metasequoia and the water-temperature condition in Liaoning Province is studied based on the method of Kira＇s Warmth Index （WI）, Coldness Index （CI） and Xu Wenduo＇s Humidity Index （HI）. The results show that the optimum range of WI, CI and HI of cultivated Metasequoia is determined. The WI value is 80.60-94.75 ℃ per month; the C1 value is -64.22-37.45 ℃ per month, and the HI value is 6.91-12.46 mrn per month. Metasequoia can also be planted in the cities to the north of Shenyang; but with limited sunlight and annual accumulated warmth, Metasequoia＇s growth rate will be further re.strieted.
关键词
水杉
栽培分布
水热条件
Metasequoia glyptostroboides
cultivated distribution
