关键词: 小粒咖啡, 施肥, 水分处理, 生长, 光合特性

Abstract: The planning site of 2010 Shanghai World Exposition was a typical old urban district speckled with factories and residential areas. The study on the heavy metals distribution in greenbelt soils under different land use patterns in the district showed that the soil Ni, Cr, Cu, Zn, Pb and Cd contents in parts of the district exceeded the National secondlevel standard, but the Hg and As contents were not. 69.83% of the green-belt soils were clean, 6.94% were relatively clean, 12.87% were slightly polluted, 2.56% had a medium degree of pollution, and 7.81% were severely polluted. The soil heavy metals content varied significantly with land use patterns. Residential or business area had no soil heavy metals pollution, but the soils near chemical-reagent factories were partly polluted by heavy metals. Soil heavy metals pollution was mainly occurred in the green belts of ship-building, mechanical, and iron-steel factories. Correlations among- soil heavy metals also varied with land use patterns, which was in accordance with the pollution produced from different land use patterns. The distance from pollutant sources and the improper management of wastes were the main factors resulting in the green-belt soil’s heavy metals pollution. To reduce the probability of the pollution, wastes and pollutant sources should be well managed to keep them away from the greenbelts.

Key words: Coffea arabica, Fertilization, Watering, Growth, Photosynthetic characteristics