灌溉排水学报2017，Vol.36Issue(7)：55-59,85,6.DOI:10.13522/j.cnki.ggps.2017.07.010
沼液对水培生菜光合特性、产量及品质的影响
Effect of Biogas Slurry on Photosynthesis, Yield and Quality of Lettuce Grown in Hydroponic Culture
摘要
Abstract
We investigated the impact of replacing part of the nutrient solution by biogas slurry on yield, quality and photosynthesis of lettuce grown in hydroponic culture at different growing stages using deep flow technique (DFT). The relationship between chlorophyll-a and photosynthetic parameters was also analyzed. The results showed that the lettuce yield increased significantly after partially substituting the nutrient solution by biogas slur-ry (P<0.05), and this is consistent in all growth stages. The yield peaked when 20％of nutrient solution was sub-stituted by biogas slurry during the second growth stage and 40％during the last growth stage, with the yield in-creasing by 66.97％compared with the CK (no biogas slurry). Substituting the nutrient solution by biogas slurry substantially increased the soluble sugar compared with the CK (P<0.01), but there was not noticeable change in the soluble proteins. It was also found that biogas slurry reduced the amount of nitrate, decreased the vitamin C, enhanced chlorophyll-a in the lettuce, as well as promoted the photosynthesis. In summary, substituting part of the nutrient solution by biogas slurry in second growth stage of the lettuce grown in hydrophobic culture in-creased its yield, quality and photosynthesis, with 40％of the medium substituted by biogas slurry most optimal.关键词
沼液/生菜/生育阶段/产量/品质/光合特性Key words
biogas slurry/hydroponic lettuce/growth stages/yield/quality/photosynthetic characteristics分类
农业科技引用本文复制引用
杨鑫,王文娥,胡笑涛,李兴杰,苏苑君..沼液对水培生菜光合特性、产量及品质的影响[J].灌溉排水学报,2017,36(7):55-59,85,6.基金项目
国家863计划项目(2013AA103004) （2013AA103004）
