WANG Huaifeng,YONG Mao,LI Liang,et al.Effects of Alginic Acid on Growth and Cadmium Accumulation of Radish[J].Northern Horticulture,2021,(13):30-35.[doi:10.11937/bfyy.20203900]
海藻酸对萝卜生长及镉积累的影响
- Title:
- Effects of Alginic Acid on Growth and Cadmium Accumulation of Radish
- Keywords:
- alginic acid; radish; cadmium; growth; physiology
- 文献标志码:
- A
- 摘要:
- 以“满身红”萝卜为试材，通过盆栽试验的方法，研究了叶面喷施不同倍数海藻酸对萝卜生长及镉积累的影响,以期为镉污染土壤生产安全蔬菜提供参考依据。结果表明：与对照相比，喷施不同倍数的海藻酸均不同程度地增加了萝卜根、块根与叶片的生物量，并且随着海藻酸浓度的增大，各器官生物量也随之增加，其中在600倍海藻酸处理中，萝卜根系、块根与叶片较对照分别显著增加98.59%、16.95%和39.13%。海藻酸处理还不同程度地提高萝卜光合色素（叶绿素a、叶绿素b、叶绿素总量和类胡萝卜素）含量和抗氧化酶活性。在镉含量方面，与对照相比，600倍和900倍海藻酸处理显著促进了萝卜根系对镉的吸收，600倍海藻酸显著增加了块根的镉含量，600、900倍和1 200倍海藻酸处理均显著增加了萝卜叶片和可食用部分的镉含量。因此，海藻酸处理促进萝卜的生长，但也促进了萝卜对镉的吸收，不适合用于镉污染土壤的萝卜栽培。
- Abstract:
- Taking ‘Manshanhong’ radish as test material,the effects of spraying alginic acid at different multiples on the growth and cadmium accumulation of radish were studied through the method of pot experiment,in order to provide reference for the production of safe vegetables in cadmium contaminated soil.The results showed that spraying different concentrations of alginic acid increased the root,tuber and leaf biomasses of radish to some extent compared with the control,and with the increase of alginic acid concentrations,the biomass of each organ increased.Among them,600 fold dilution of alginic acid significant increased the root,tuber and leaf biomasses of radish by 98.59%,16.95% and 39.13%,respectively,compared with the control.Alginic acid treatment also increased the photosynthetic pigments (chlorophyll a,chlorophyll b,total chlorophyll and carotenoid) content and the antioxidant enzymes (SOD,POD and CAT) activity of radish to some extent.In terms of cadmium content,compared with the control,600 and 900 fold dilutions alginic acid treatments significantly promoted the cadmium absorption of radish roots,600 fold dilution alginic acid significantly increased the cadmium content in tuber,and 600,900 and 1 200 fold dilutions alginic acid treatments all significantly increased the cadmium content in leaves and edible parts.Therefore,alginic acid treatment could promote the growth of radish,but also could promote the cadmium absorption of radish,which was not suitable for radish cultivation in cadmium-contaminated soil.
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备注/Memo
第一作者简介：王怀凤（1981-），女，本科，副研究员，现主要从事大萝卜育种及西藏蔬菜种质资源综合评价与利用等研究工作。E-mail:106127765@qq.com.基金项目：西藏自治区财政厅资助项目（XZNKY-2019-C-056）；第二次青藏高原科学考察研究资助项目（2019QZKK0502）。收稿日期：2020-09-10