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| Effects of warming and atmospheric CO2 enrichment on nutrient uptake of different wheat varieties |
| Received:December 13, 2019 |
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| KeyWord:climate change;free-air CO2 enrichment (FACE);wheat variety;nutrients uptake |
| Author Name | Affiliation | E-mail | | SUN Bao-bao | Institute of Resource, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing 210095, Chin | | | LIU Xiao-yu | Institute of Resource, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing 210095, Chin | xiaoyuliu@njau.edu.cn | | YUAN Rui | Institute of Resource, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing 210095, Chin | | | LIU Cheng | Institute of Resource, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing 210095, Chin | | | LI Jie | Institute of Resource, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing 210095, Chin | | | ZHANG Xu-hui | Institute of Resource, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing 210095, Chin | | | LI Lian-qing | Institute of Resource, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing 210095, Chin | | | PAN Gen-xing | Institute of Resource, Ecosystem and Environment of Agriculture, Nanjing Agricultural University, Nanjing 210095, Chin | |
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| Abstract: |
| The objective of this study was to investigate the effect of warming and atmospheric CO2 enrichment on the nutrient uptake of different wheat varieties. The results could provide a scientific reference for soil nutrient management and crop fertilization under future climate change. This study was carried out in an open field experiment station, where crop canopy warming and atmospheric CO2 enrichment were simulated. Four treatments were designed, including the control(CT), atmospheric CO2 enrichment(C+T), warming(CT+), and both (C+T+). Four varieties of wheat, including Yangmai 16, Sumai 188, Xinnong 518, and Zhenmai 9, were grown. The concentrations of N, P, K, Ca, and Mg in the wheat grain and straw were determined by harvest and the nutrient content ratio of the grain and straw was calculated. Atmospheric CO2 enrichment increased the total uptake of N, K, Ca, and Mg of wheat. The total uptake of N, K, and Mg was affected by both atmospheric CO2 enrichment and wheat variety. However, atmospheric CO2 enrichment did not affect the distribution of nutrients between wheat grain and straw. Warming significantly reduced the total uptake of nutrients in the wheat. In addition, warming also increased the distribution ratio of K in the grain and reduced the distribution ratio of Ca in the grain. Under warming and atmospheric CO2 enrichment, the change in total nutrient uptake of wheat was not only related to plant biomass but also to the nutrients' concentration. Atmospheric CO2 enrichment reduced the concentration of P in wheat straw and grain. The effect of CO2 enrichment on the concentration of N and Mg in the grain as well as N, P, and K in the straw was also related to the wheat variety. Warming reduced the concentrations of K in straw and P, K, Ca, and Mg in the grain, while the response of the P uptake to warming was affected by the variety. Therefore, it was determined that warming and atmospheric CO2 enrichment altered the nutrient absorption process of wheat and that these changes were closely related to nutrient types and crop varieties. Therefore, soil fertilization and management need to be adjusted according to crop varieties under a changing climate. |
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