| Effects of Zn application on uptake of Ca, Fe, Mn and Cu by maize plants under different water conditions in soil layers |
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| DOI：10.7606/j.issn.1000-7601.2012.01.01 |
| Key Words: drought maize nutrient uptake Zinc |
| Author Name | Affiliation | | WANG Hong | Key Laboratory of Crop Nutrition and Fertilization of Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beiji
ng 100081, China | | LIU RongLe | Key Laboratory of Crop Nutrition and Fertilization of Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beiji
ng 100081, China | | JIN JiYun | Key Laboratory of Crop Nutrition and Fertilization of Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beiji
ng 100081, China |
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| Abstract: |
| A pot experiment with splitting vertically layer culture systems was conducted to study the effects of Zn application in topsoil on maize plant growth and the uptake of Ca, Fe, Mn and Cu in two soil layers under different water conditions. The results showed that plant growth was inhibited by soil water deficit in topsoils, even when the water supply in subsoils was improved. The translocation of Ca, Fe and Mn to shoots in maize plants was decreased by drought in topsoil. The shoot biomass and Zn accumulation in shoots were significantly enhanced by Zn application. Under adequate moisture supply in whole soil layers, the increases of plant growth and Zn uptake due to Zn application were more remarkable than that under drying conditions. Whatever soil water condition, Zn application decreased Ca, Fe, Mn and Cu concentrations in shoots and plant Fe accumulation. However, Zn application did not affect Ca, Fe, Mn or Cu translocation to shoots. Under drought in upper soil layer, Zn addition also reduced Mn accumulation in shoots and Cu accumulation in roots. Our research suggested that adequate water supply in subsoil couldn′t enhance plant growth or plant Ca, Fe, Mn and Cu uptake if maize plants were grown under drought stress. Zn
was recommended to apply if irrigated adequate water in soil layer so as to promote plant water use, but more attention should be paid to the antagonism of Zn on crop Fe and Mn uptake. |
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