渗灌与滴灌下有机水溶肥施用对番茄生长、产量和品质的影响OA

To investigate the effects of applying organic water-soluble fertilizers under seepage irrigation and drip irrigation on the growth,yield,and quality of greenhouse tomatoes,two irrigation methods(seepage irrigation,S;drip irrigation,D),two organic water-soluble fertilizers(Carbonase Seaweed Fruit Enlargement 100,F1;Fruit Enlargement 100%,F2),and three fertilization rates(150 kg/hm²,N1;225 kg/hm²,N2;300 kg/hm²,N3)were set up,along with two controls(SCK,DCK),totaling 14 treatments.The effects of different treatments on tomato plant height,stem diameter,leaf area index(LAI),relative chlorophyll content(SPAD value),yield,and quality were investigated.Results indicate that tomato growth and quality metrics under the N2 fertilization level outperformed other treatments.The SF2N2 treatment significantly enhanced tomato quality,with single-fruit weight,vitamin C,lycopene,soluble sugars,and the sugar-acid ratio increasing by 26.98%,73.86%,104.25%,50.42%,and 95.08%,respectively,compared to the SCK treatment.Nitrate content remained within acceptable limits,while titratable acid decreased by 22.81%compared to the SCK treatment.Under identical irrigation and fertilization conditions,the F2 organic water-soluble fertilizer demonstrated superior enhancement effects on tomato indicators compared to the F1 fertilizer,increasing yields by 16.74%to 21.39%.Under other identical conditions,the yield and WUE under seepage irrigation were higher than those under drip irrigation,showing superior performance in water conservation,yield enhancement,and quality improvement.Collectively,these findings provide a water-saving irrigation method and a reasonable fertilization scheme for protected-culture tomato cultivation in Shanxi Province.