江西农业大学学报2025，Vol.47Issue(4)：878-889,12.DOI:10.3724/aauj.2025075
富硒种植条件下不同收获期对甘薯产量、品质及硒含量的影响
Effect of different harvest times on yield,qualities,and selenium(Se)content of sweet potato under selenium-enriched cultivation conditions
摘要
Abstract
[Objective]This study aims to investigate the formation characteristics of yield,quality,and selenium content in different types of sweet potatoes under selenium-rich cultivation conditions at varying harvest periods,providing a reference for efficient selenium-enriched sweet potato production.[Method]A field experiment was conducted to evaluate the effects of foliar-applied organic selenium(Se,50 mg/L)on two sweet potato cultivars:the fresh-consumption type'Xinxiang'and starch-processing type'Shangshu 19'.Treatments were applied at the active vine growth phase(corresponding to tuber initiation stage),with six harvest time points from 75 to 125 days after transplanting(10-day intervals).Selenium distribution patterns among plant tissues,along with yield components and nutritional quality parameters of storage roots,were systematically analyzed.[Result]Under the selenium-enriched cultivation conditions,the tuber yield,commodity property,individual tuber weight,and starch yield of two different types sweet potatoes generally showed an increasing trends as the harvest time was delayed.The optimal effects were observed at harvest 125 days after transplanting.Selenium content in tubers generally exhibited an opposite trends compared with that of the yield.Under this condition,the highest selenium content(0.062 mg/kg)was observed in"Xinxiang"at 105 days after transplanting,while the lowest value occurred in"Shangshu 19"at 115.When the fresh-edible sweet potato"Xinxiang"was harvested at 85-115 days after transplanting,the protein content in its tuberous roots was relatively high.While for Shangshu 19,the protein content in tuberous roots was relatively high when harvested at 75-95 DAT.Both types of sweet potatoes harvested between 105th and 125th days had higher soluble sugar and starch contents,and soluble sugar peaked at 115th day harvest,which was beneficial for sugar accumulation.Additionally,different types of sweet potatoes reached the lowest gelatinization enthalpy at 105th day,being favorable for starch gelatinization,and exhibited significantly higher breakdown values under harvesting 125th day,to improve tuber palatability.[Conclusion]Generally speaking,under selenium-enriched cultivation conditions,when the fresh-edible sweet potato"Xinxiang"and the starch-type sweet potato"Shangshu 19"are harvested at 105 days and 125 days after transplanting respectively,it is possible to achieve a coordinated improvement in the yield and quality of tuberous roots while taking into account the absorption of selenium elements.关键词
富硒种植/收获时期/甘薯/产量/品质Key words
selenium-enriched cultivation/harvest times/sweet potato/yield/quality分类
农业科技引用本文复制引用
磨冬枝,刘芃君,姜吉梁,刘有清,程建峰,谭雪明,曾研华..富硒种植条件下不同收获期对甘薯产量、品质及硒含量的影响[J].江西农业大学学报,2025,47(4):878-889,12.基金项目
江西省薯类产业技术体系项目(JXARS-19-02) Project supported by Jiangxi Agriculture Research System(JXARS-19-02) 江西省富硒农业研究院委托项目(JXFX21-ZD05、JXFX22-ZD02)同时对本研究给予了资助,谨致谢意! （JXARS-19-02）
