【摘要】 对上海现代化温室番茄整个生育期的营养液管理调查表明 ,番茄灌溉营养液的pH范围为 5 .0～ 6 .0 ,回收液pH范围为 6 .0～ 7.0 ;回收液EC值比灌溉液平均高约 1.0ms·cm-1,两者浓度在整个生育期变化不大 ;影响灌溉量的主要因素是温度、光照 ,回收液量占灌溉量的 4 0 %以上 ;营养液配方在不同生长期略有差别 ,营养生长期需氮、钙、镁高 ,生殖生长期需钾多 ,钙镁需求降低更多还原

【Abstract】 The investigation on the nutrient solution management of tomato cultivation under modern greenhouse showed that ranges of pH in nutrient solution and drainage solution were 5.0-6.0 and 6.0-7.0 respectively. The EC value in drainage solution was 1.0ms·cm -1 higher than that in nutrient solution. The important factors affecting the amount of nutrient solution supply were light intensity and temperature. The amount of drainage was over 40% of irrigation amount. Tomato needed more N,Ca and Mg during vegetative growth,and more K and less Ca and Mg during fruiting stage.更多还原