摘要
以罗马生菜(Lactuca sativa)为试材,选取硫酸镁(MgSO_(4))、螯合镁(Mg-EDTA)、氧化镁(MgO)、氢化镁(MgH_(2))、镁粉(Mg)5种不同形态镁肥,设置4种镁浓度:0 mg/kg(L0)、3.5 mg/kg(L1)、7 mg/kg(L2)、14 mg/kg(L3),采用盆栽试验检测分析不同形态镁肥对生菜种子萌发、植物生长及营养品质的影响。研究不同形态镁(Mg)对叶用作物生菜的产量及营养成分的作用,明确提升生菜产量及营养成分的镁肥种类及施用措施。研究表明,与不施镁肥的L0相比,5种形态镁肥在4种施用浓度下对生菜种子萌发、株高、地上部鲜重、叶绿素、可溶性糖、可溶性蛋白及维生素C含量有不同的促进作用。添加氢化镁对提高生菜产量及种子萌发率的效果最佳,并能提升其品质,施镁3.5 mg/kg水平时,种子萌发率提高65%,每株地上部鲜重增加102%,叶绿素、可溶性蛋白、可溶性糖及维生素C含量也得到显著增加;添加镁粉对提高生菜的品质最佳,L1、L3施镁浓度可大幅提高叶绿素、可溶性蛋白含量、维生素C含量以及可溶性糖含量,分别达到70%、86%、373%及120%;添加螯合镁及氧化镁的处理,施镁7 mg/kg浓度较好,提高生菜产量的同时也能有效提高维生素C含量,分别达到412%和374%。硫酸镁处理在施镁3.5 mg/kg水平时,能大幅提高可溶性糖含量,达到157%。氢化镁、氧化镁及镁粉的施加能提高土壤pH值。通过对各指标进行主成分分析获得综合得分,并对其进行排名,得到氢化镁在施镁浓度为3.5 mg/kg时,生菜的生长生理及营养品质指标最优。
Using Romaine lettuce(Lactuca sativa)as the test material,five different forms of magnesium fertilizers were selected and applied in the pot experiment,including magnesium sulfate(MgSO_(4)),magnesium chelate(Mg-EDTA),magnesium oxide(MgO),magnesium hydride(MgH2),and magnesium(Mg),with four magnesium concentrations of 0 mg/kg(L0),3.5 mg/kg(L1),7 mg/kg(L2),and 14 mg/kg(L3),to evaluate the effects of different forms of magnesium fertilizers on seed germination,yield and nutritional quality of lettuce,and clarify the types of magnesium fertilizers and application measures to enhance the yield and quality of lettuce.Compared to the control without magnesium fertilizer application,five forms of magnesium fertilizer at four application concentrations had different promoting effects on lettuce seed germination,plant height,aboveground fresh weight,and contents of chlorophyll,soluble sugar,soluble protein,and vitamin C.The addition of MgH2 at 3.5 mg/kg had the best effect on improving lettuce yield with the increase of seed germination rate by 65% and the increase of fresh weight of each plant by 102%,as well as improving its quality, the contents of chlorophyll,soluble protein,soluble sugar,and vitamin C was also significantly promoted.Adding Mg powder was the best way to improve the quality of lettuce,magnesium concentrations at L1 and L3 level significantly increased chlorophyll,protein content,soluble sugar content and vitamin C content ,reaching 70%,86%,373% and 120% ,respectively.The application of Mg-EDTA and MgO at 7 mg/kg magnesium not only increased lettuce yield but also effectively increased vitamin C content,reaching 412% and 374%,respectively.The application of MgSO_(4)at 3.5 mg/kg greatly enhanced soluble sugar content by 157%.The application of magnesium hydride,magnesium oxide,and magnesium powder increased the soil pH value.By conducting principal component analysis on various indicators to obtain comprehensive scores and ranking them,it was ultimately found that the growth physiology and nutritional quality indicators of lettuce were optimal when the magnesium concentration of magnesium hydride was applied at 3.5 mg/kg.
作者
梁木华
韦一
陈家琦
凌翔
李晓正
刘志明
杨海燕
潘琪芳
LIANG Mu-hua;WEI Yi;CHEN Jia-qi;LING Xiang;LI Xiao-zheng;LIU Zhi-ming;YANG Hai-yan;PAN Qi-fang(School of Agriculture and Biology,Shanghai Jiao Tong University,Shanghai 201100;Shanghai Jiao Tong University Hydrogen Science Center,Shanghai Key Laboratory of Hydrogen Science,Shanghai 200240;Baomak(Hefei)Technology Co.,Ltd.,Hefei Anhui 238060)
出处
《中国土壤与肥料》
CAS
CSCD
北大核心
2024年第9期135-143,共9页
Soil and Fertilizer Sciences in China
基金
横向课题“新型高效镁肥的研发”。
关键词
镁肥
生菜
生长发育
维生素C
土壤PH值
magnesium fertilizer
lettuce
growth and development
vitamin C
soil pH value
作者简介
梁木华(2002-),本科,专业为植物科学与技术。E-mail:muhualiang@sjtu.edu.cn;通讯作者:杨海燕,E-mail:yanghaiyan@sjtu.edu.cn;通讯作者:潘琪芳,E-mail:panqf@sjtu.edu.cn。
