Abstract: Based on the observed pimiento and meteorological data in the same period in self-controlled greenhouse, the model were simulated by mathematical statistical method for pimiento on number of leaves and growth and weight of fruit.The number of leaves for pimiento agreed with the model of plant growth. The key meteorological factors were effective cumulative day average temperature from 13℃ to 22℃ before tip cutting, 13～25℃ after tip cutting.The meteorological factors affecting the growth speed of the fruit were effective cumulative average day temperature from 16℃ to 23℃, sunlight, daily temperature range, and concentration of CO₂ The growth speed of the fruit follows the logarithm rule.The length of fruit growing period and fruit weight depend on effective cumulative day average temperature from 14℃ to 23℃, sunlight, daily temperature range, and concentration of CO₂.The meteorological factors for abortive fallen fruit were sunlight less than1.5×10⁴1x 2d before flower and 3d after flower, daily temperature range less than 6.5℃ 3～12d after flower and relative humidity higher than 82% 3～18d after flower.

Key words: Sanjiang Plain, Wetland, Soil, Total sulfur