高楼阳台在炎热高温的夏季,特别干燥且温度比地面及室内高得多。而水泥台面及墙壁在强光照射下,吸热快,散热慢。如在一天中温度最高时的中午给盆栽花木浇水,会产生局部(盆花周围及水泥台面和墙壁)温度急骤上升,水产生热蒸气会直接灼伤花木的须根及嫩枝叶和花果。偶尔一两次,从花木的外表看,不会有明显的伤害痕迹,盆花也确实解了一时之渴。但经常在这种情况下浇水,其危害很快就会有所反映,花木因难以承受经常性的高温蒸烤灼伤。叶片大面积发黄变黑焦而脱落,花蕾干瘪,幼果脱落,甚至导致整株花木因无力抵抗而彻底枯亡。夏季中午是太阳照射地球距离最近之时,也是光线 High-rise balconies in the hot summer months, especially dry and much higher temperature than the ground and indoor. The cement countertops and walls in bright light, fast heat absorption, heat slowly. If the temperature of the day at noon to the watering of potted plants, there will be a local (potted flowers and cement countertops and walls) a sharp rise in temperature, hot water will directly burn the flowers of the watery roots and twig leaves and fruit. Occasionally once or twice, from the appearance of flowers and trees, there will be no obvious signs of harm, potted flowers really solved the moment of thirst. But often in this case watering, the harm will soon be reflected, flowers and trees due to the unbearable heat burns. Large areas of yellow leaves turn black coke and fall off, buds shriveled, young fruit fall off, and even led to the entire plant due to the inability to resist completely died. Summer noon is the sun when the earth is closest, is also the light