外源喷施氨基酸肥对豆瓣菜生长与硒吸收的影响  

Effects of exogenous spraying of amino acid fertilizer on growth and selenium uptake of watercress

作　　者：肖家昶 雷凤芸 格桑 马俊英 贺茂林 李艳文 郑阳霞[1] XIAO Jiachang;LEI Fengyun;GE Sang;MA Junying;HE Maolin;LI Yanwen;ZHENG Yangxia(College of Horticulture,Sichuan Agricultural University,Chengdu 611130,China;Agricultural Equipment Research Institute,Chengdu Academy of Agriculture and Forestry Sciences,Chengdu 611130,China;Shannan Agricultural Technology Extension Center of Tibet Autonomous Region,Shannan 856000,Tibet,China)

机构地区：[1]四川农业大学园艺学院,四川成都611130 [2]成都市农林科学院农业装备研究所,四川成都611130 [3]西藏自治区山南市农业技术推广中心,西藏山南856000

出　　处：《浙江农业学报》2023年第7期1638-1647,共10页Acta Agriculturae Zhejiangensis

基　　金：陕西省科技厅项目(2022ZY1-CGZY-07)。

摘　　要：为提高豆瓣菜(Nasturtium officinale R.Br.)对硒的吸收能力,采用盆栽试验研究不同浓度氨基酸肥(分别稀释0、600、900、1200和1500倍)对硒处理(5 mg·kg^(-1))下豆瓣菜生长与硒吸收的影响。结果表明,外源喷施氨基酸肥可以提高豆瓣菜地下与地上部分的生物量,促进叶片中叶绿素含量和类胡萝卜素含量增加,提高超氧化物歧化酶(SOD)、过氧化物酶(POD)和过氧化氢酶(CAT)活性,降低可溶性蛋白含量。主成分分析结果表明,氨基酸肥900倍稀释液对豆瓣菜的生长促进作用最优,此时地下与地上部分生物量较对照分别显著增加了73.03%和56.65%。外源喷施氨基酸肥900~1500倍稀释液还可以提高豆瓣菜根、茎和叶的硒总积累量,但对豆瓣菜根、茎、叶和地上部分的硒含量无积极作用。相关分析发现,豆瓣菜生物量、硒总积累量与叶绿素含量、类胡萝卜素含量、POD活性、SOD活性、CAT活性、土壤pH值呈正相关。综上说明,氨基酸肥可以促进豆瓣菜的生长,提高豆瓣菜对硒总量的积累。In order to improve the selenium absorption capacity of watercress(Nasturtium officinale R.Br.),pot experiments were conducted to investigate the effects of different concentrations of amino acid fertilizer(dilute 0,600,900,1200 and 1500 times)on growth and selenium absorption of watercress under selenium treatment(5 mg·kg^(-1)).The results showed that exogenous application of amino acid fertilizer could increase the biomass of root and shoot of watercress,promote the content of chlorophyll and carotenoid in leaves,increase the activities of superoxide dismutase(SOD),peroxidase(POD)and catalase(CAT),and reduce the content of soluble protein.The results of principal component analysis showed that 900 times dilution of amino acid fertilizer had the best growth promotion effect on watercress,and the root and shoot biomass increased significantly by 73.03%and 56.65%compared with the control,respectively.The application of 900-1500 times dilution of amino acid fertilizer could also increase the total selenium accumulation in root,stem and leaf of watercress,but had no positive effect on the selenium content in root,stem,leaf and shoot of watercress.Correlation analysis showed that the biomass and total selenium accumulation of watercress were positively correlated with chlorophyll content,carotenoid content,POD activity,SOD activity,CAT activity and soil pH value.In conclusion,amino acid fertilizer can promote the growth of watercress and increase the total selenium accumulation in watercress.

关 键 词：氨基酸肥 豆瓣菜 生物量 硒积累量 

分 类 号：S645[农业科学—蔬菜学]