Effects of Nitrogen-Phosphorus-Potassium Water-Soluble Fertilizer and Irrigation Levels on Yield and Nutritional Quality of Vegetable Sweet Potato
Xie Beitao
Tian Yiru
Feng Xiangyang
Duan Wenxue
Dong Shunxu
Zhang Liming
Zhang Zhiyun
Zhang Haiyan
Abstract：The experiments using vegetable sweet potato varieties"Fucaishu 18"and"Shulv 1"were conducted under integrated water and fertilizer management to study the effects of different fertilization with wa-ter-soluble fertilizer and irrigation levels on their yield and nutritional quality.The results showed that in the fertilization experiment,both"Fucaishu 18"and"Shulv 1"had the highest yield under F3 treatment(applica-tion of 30-10-10 water-soluble fertilizer at 450 kg/hm2 every 14 days,5 times in total),which were signifi-cantly higher than that of FCK(only irrigation without fertilization)and were up to 26 893.7 kg/hm2 and 24 532.5 kg/hm2,respectively.The protein and total phenol contents were generally higher than those in FCK,F1 treatment(application of 30-10-10 water-soluble fertilizer at 150 kg/hm2 every 14 days,5 times in total),and F2 treatment(application of 30-10-10 water-soluble fertilizer at 300 kg/hm2 every 14 days,5 times in total).In the irrigation experiment,the yield of"Fucaishu 18"and"Shulv 1"in S2 treatment(appli-cation of 150 m3/hm2 water every 7 days,total irrigation amount of 1 200 m3/hm2)and S3 treatment(appli-cation of 300 m3/hm2 water every 14 days,total irrigation amount 1 200 m3/hm2)were higher than those of SCK(fertilization without irrigation)and S1 treatment(application of 75 m3/hm2 water every 7 days,total ir-rigation amount of 600 m3/hm2),and the contents of protein,soluble sugar,vitamin C and total phenol were generally higher than those of SCK.Therefore,the recommended fertilization strategy for vegetable sweet potato production was to apply water-soluble fertilizer(N-P-K=30-10-10)five times throughout the growth period with fertilization every 14 days at a rate of 450 kg/hm2 and a total fertilization amount of 2 250 kg/hm2.The recommended water management strategy was to irrigate every 7 days at the level of 150 m3/hm2 throughout the growth period with a total irrigation amount of 1 200 m3/hm2,or irrigate every 14 days at 300 m3/hm2 with a total irrigation amount of 1 200 m3/hm2.
Keywords：Vegetable sweet potatoFertilizationIrrigationYieldNutritional quality
Publication Date：2025-12-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：9( 99-107 )