Effect of Humic Acid Application on Yield and Absorption of Water and Nutrients by Lettuce in Hydroponic Culture
Hydroponic experiment were done on the effect of humic acid application on yield and absorption of water and nutrients by lettuce.The results showed that the FW and DW of hydroponic lettuce increased with the humic acid concentration raising with 0~1.41 mg/g.The 1.41 mg/g concentration humic acid,which was the concentration of the highest volume for each aforementioned in-dex.Humic acid is cushion for the nutrient solution pH value.At the condition of 0~1.41 mg/g concentration humic acid,water use efficiency (WUE)and use efficiencies of mineral elements increased with the humic acid concentration rising.The effect of humic acid application on nutrient absorption of lettuce is not significant.The ability to absorb inorganic nutrients is different with different humic acid concentrations treatments.Synthesize the yield,water and nutrient absorption factor,effect of high yield,water saving, fertilizer production would achieve when humic acid with 1.41 mg/g concentration were added in Yamazaki formula.
NETL
NSTL
万方数据
维普
