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9种温室栽培植物品种的幼小植株在相对大气湿度(RH)分别为55—60、70—75和90—95%的温室中培养24—100天,每周换两次完全营养液。蒸腾速率随着RH从最低升到最高水平而显著降低,一品红(Euphorbia pulcherrima)降低60%,冬令秋海棠(Begonia Xhiemalis)为54%,非洲紫苣苔(Saintpaulia ionantha)为54%,高肾鳞蕨(Nephrolepis exaltata)为48%,蓄茄(Lycopersicon esculentum)为44%。植株叶片中大量营养元素含量随RH升高而减少,但只有番茄叶片中K和Ca及肾鳞蕨叶片中开氏N的减少是显著的。试验结束时,高RH时生长植物的基质中大量营养元素含量最低,其中主要受影响的元素是N和K。
The young plants of the nine greenhouse cultivars were cultured for 24-100 days in 55-60, 70-75 and 90-95% of the greenhouse at relative atmospheric humidity (RH), changing twice a week to complete nutrient solution. Transpiration rates decreased significantly with increasing RH from lowest to highest levels, with a reduction of 60% for Euphorbia pulcherrima, 54% for Begonia xhiemalis, 54% for Saintpaulia ionantha, Nephrolepis exaltata 48%, Lycopersicon esculentum 44%. The content of macronutrients in plant leaves decreased with the increase of RH, but only the decrease of K and Ca in tomato leaves and the Kjeldahl N in the leaves of Scleracthenia scabra were significant. At the end of the experiment, a large number of nutrients were found in the stroma of growing plants at high RH, with N and K being the major affected elements.