湖北农业科学2026，Vol.65Issue(5)：17-25,9.DOI:10.14088/j.cnki.issn0439-8114.2026.05.004
氮钾配施对遮阴条件下甘薯生长及产量的影响
Effects of nitrogen and potassium combined application on growth and yield of sweet potato under shading conditions
摘要
Abstract
In order to explore the effects of nitrogen and potassium combined application on the growth and yield of sweet potato[Ipo-moea batatas(L.)Lam.]under shading conditions,the long-vine variety G8017 and the short-vine variety G8507 were used as mate-rials,and four nitrogen and potassium ratios were set up[CK:blank control;C1:low nitrogen and low potassium(urea 75 kg/hm2+potassium sulfate 150 kg/hm2);C2:high nitrogen and low potassium(urea 300 kg/hm2+potassium sulfate 150 kg/hm2);C3:high ni-trogen and high potassium(urea 300 kg/hm2+potassium sulfate 600 kg/hm2)].The pot experiment was carried out under 50％shading environment,and the agronomic traits,photosynthetic characteristics and yield were measured.The results showed that C2 significant-ly promoted the increase of vine length.C3 showed the best performance in stem diameter,branch number,root dry weight and yield,and effecitively increased chlorophyll content,net photosynthetic rate and antioxidant enzyme activity.Correlation analysis showed that the root yield of the two varieties was significantly positively correlated with the number of branches,stem diameter,dry matter weight above ground and dry matter weight of tubers,and negatively correlated with vine length and T/R(the ratio of shoot dry weight to root dry weight).In summary,C3(high nitrogen and high potassium)was a suitable fertilization strategy for sweet potato cultivation under moderate shading conditions.关键词
甘薯[Ipomoea batatas(L.)Lam.]/遮阴/氮钾配比/光合特性/产量Key words
sweet potato[Ipomoea batatas(L.)Lam.]/shading/nitrogen-potassium ratio/photosynthetic characteristics/yield分类
农业科技引用本文复制引用
柴沙沙,翟红,张萌,王连军,雷剑,靳晓杰,徐军乐,杨新笋..氮钾配施对遮阴条件下甘薯生长及产量的影响[J].湖北农业科学,2026,65(5):17-25,9.基金项目
国家重点研发项目(2024YFD2301000) （2024YFD2301000）
国家现代农业产业技术体系项目(CARS-10,甘薯),湖北省支持种业高质量发展资金项目(HBZY2023B002) （CARS-10,甘薯）
薯类产业支撑技术研究与示范项目(2024-620-000-001-005) （2024-620-000-001-005）
