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邢 颖,刘永贤,梁潘霞,廖 青,潘丽萍,陈锦平,黄太庆,江泽普.磷对富硒赤红壤与红壤上小白菜硒吸收及土壤硒形态的影响[J].土壤,2018,50(6):1170-1175. XING Ying,LIU Yongxian,LIANG Panxia,LIAO Qing,PAN Liping,CHEN Jinping,HUANG Taiqing,JIANG Zepu.Effects of Phosphorus on Selenium Uptake of Pakchoi and Soil Selenium Morphology in Se-rich Latosolic Red Soil and Red Soil[J].Soils,2018,50(6):1170-1175 本文二维码信息
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磷对富硒赤红壤与红壤上小白菜硒吸收及土壤硒形态的影响
Effects of Phosphorus on Selenium Uptake of Pakchoi and Soil Selenium Morphology in Se-rich Latosolic Red Soil and Red Soil
投稿时间:2018-07-03  修订日期:2018-08-28
DOI:10.13758/j.cnki.tr.2018.06.018
中文关键词:    富硒赤红壤  富硒红壤  硒形态
Key Words:Phosphorus  Se-rich latosolic red soils  Se-rich red soils  Selenium morphology
基金项目:国家自然科学基金项目(41761052)、广西创新驱动重大专项项目(桂科AA17202026)、广西青年基金项目(2016GXNSFBA380131)、广西农业科学院科技发展基金项目(桂农科2017JM01;桂农科2017JM03)、广西农业科学院基本科研业务专项项目(桂农科2017YZ03;2015YT33)和广西富硒特色作物试验站项目(桂TS2016011)资助。
作者单位E-mail
邢 颖 广西农业科学院农业资源与环境研究所 xingying-126@163.com 
刘永贤 广西农业科学院农业资源与环境研究所 liuyx27@163.com 
梁潘霞 广西农业科学院农业资源与环境研究所  
廖 青 广西农业科学院农业资源与环境研究所  
潘丽萍 广西农业科学院农业资源与环境研究所  
陈锦平 广西农业科学院农业资源与环境研究所  
黄太庆 广西农业科学院农业资源与环境研究所  
江泽普 广西农业科学院农业资源与环境研究所  
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中文摘要:
      采用土培盆栽试验方法,研究了广西两种主要富硒土壤施入不同水平磷对小白菜硒吸收积累的影响及土壤硒形态转化规律,旨在为提高土壤有效形态硒含量及植物硒含量提供理论依据。试验采集广西具有代表性的富硒赤红壤(贵港市桂平市)和富硒红壤(桂林市永福县),设置4个磷梯度盆栽试验。结果表明:相同的磷处理在不同土壤上对小白菜硒吸收效果不同。在富硒赤红壤上低磷处理(P50,50 mg/kg)有利于小白菜地上部和地下部对硒的吸收;在富硒红壤上中磷处理(P110,110 mg/kg)小白菜地上部硒含量最高,地下部施入磷则硒含量均显著低于对照。同时,磷的施入对硒在小白菜体内的转运在两种土壤上也存在差异。在富硒赤红壤上当磷施入量在80 mg/kg以下时,磷的施入会抑制硒从地下部向地上部的转运;在富硒红壤上磷的施入则均能促进硒的转运;但二者均在中磷处理时达到峰值。植株体内硒含量间的差异取决于土壤有效形态硒含量。研究结果显示磷的施入均显著增加了土壤中水溶态和交换态硒的含量,且小白菜硒的含量与土壤中水溶态硒规律一致。研究还发现在两种土壤上不同磷处理对土壤硒形态转化规律不同,这为进一步研究磷与土壤硒间的互作关系提供了参考。
Abstract:
      In order to provide theoretical basis for improving selenium content in soil and plant, the effects of different concentrations of phosphorus on selenium uptake and accumulation of pakchoi in two main selenium-rich soils of Guangxi and the morphological transformation of soil selenium were studied by soil culture pot experiment in which four phosphorus concentration gradients were designed for Se-rich latosolic red soils (Guiping City, Guigang City) and red soils (Yongfu County, Guilin City) in Guangxi. The results showed that the same phosphorus treatment had different effects on selenium uptake of pakchoi in different soils. Low phosphorus treatment (P50, 50 mg/kg) was beneficial to selenium uptake of pakchoi in Se-rich latosolic red soils. Selenium content in the aboveground part of pakchoi was the highest in P110 treatment (110 mg/kg), while that in the underground part was significantly lower than the control group in Se-rich red soils. At the same time, selenium transport by applying phosphorus to pakchoi was also different in the two soils. In Se-rich latosolic red soils, when the amount of phosphorus was less than 80 mg/kg, the application of phosphorus inhibited selenium transport from underground to aboveground, but selenium transport was promoted in Se-rich red soils, and both peaked at P110. The difference of selenium content in plants depends on the effective form of selenium content in soil. The results showed that the application of phosphorus significantly increased the contents of water soluble and exchangeable selenium in soil, and selenium content in pakchoi was consistent with the water-soluble selenium in the soil, different phosphorus treatments had different rules in selenium morphological transformation in the two soils, which provides a reference for further study on the interaction between phosphorus and selenium.
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