不同形态铁肥对水培生菜生长和品质的影响

Effect of Different Kinds of Ferric Fertilizer in the Nutrient Solution of Hydroponic Culture on the Yield and Quality of Lettuce

研究营养液中选用4种不同形态的铁肥对水培生菜生长和品质的影响,结果表明,在本试验条件下,DTPA铁处理与EDTA、硫酸亚铁、柠檬酸铁处理相比,表现最佳。用DTPA铁处理的生菜,与上海孙桥无土栽培专用肥处理(CK1)的相比,单株产量超出3%,株高超出19.58%,光合速率高出12.74%,VC含量高出3.5%。说明DTPA铁可以在无土栽培中应用。

Four kind of ferric fertilizer in the nutrient solution of hydroponic culture were tested for the effect on lettuce. The results showed that under the condition of this test, the treatment of DTPA-Fe growed best. With the fertilizer DTPA-Fe, in comparison with CK1, the yield of one lettuce overpassed 3%; the height of one lettuce overpassed 19.58%; the Pn overpassed 12.74%; the content of Pn of VC overpassed 3.5%. It is concluded that DTPA-Fe may be used under soilless condition.