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| Effects of acidity and aluminum stress on the growth of Neyraudia reynaudiana |
| Received:December 15, 2017 |
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| KeyWord:pioneer plant;soil and water conservation;Neyraudia reynaudiana;pH;aluminum;acidity |
| Author Name | Affiliation | E-mail | | WU Jia-long | College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
Key Laboratory of Arable Land Conservation in South China, Ministry of Agriculture, Guangzhou 510642, China | | | DAI Jun | College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
Key Laboratory of Arable Land Conservation in South China, Ministry of Agriculture, Guangzhou 510642, China | | | FENG Hong | College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
Key Laboratory of Arable Land Conservation in South China, Ministry of Agriculture, Guangzhou 510642, China | | | DENG Ting | College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
Key Laboratory of Arable Land Conservation in South China, Ministry of Agriculture, Guangzhou 510642, China | | | QIAN Huan | College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
Key Laboratory of Arable Land Conservation in South China, Ministry of Agriculture, Guangzhou 510642, China | | | GUO Yan-biao | College of Natural Resources and Environment, South China Agricultural University, Guangzhou 510642, China
Key Laboratory of Arable Land Conservation in South China, Ministry of Agriculture, Guangzhou 510642, China | guoyanbiao@scau.edu.cn |
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| Abstract: |
| A hydroponic experiment was conducted to evaluate the effects of different pH levels and aluminum (Al) concentrations on the growth of Neyraudia reynaudiana growth, which is a pioneer plant for soil and water conservation. The results indicated that the growth of Neyraudia reynaudiana was inhibited significantly under the condition of pH 2.5 and high Al concentration (≥ 3000 μmol·L-1) (P<0.05). Under the conditions of pH 3.5 and 4.5, an Al concentration of 1000 μmol·L-1 or below did not inhibit Neyraudia reynaudiana growth. Neyraudia reynaudiana grew better under the condition of pH 4.5 than that of pH 6.5. The ability of Neyraudia reynaudiana to absorb nitrogen, phosphorus, and potassium was significantly inhibited under the condition of pH 2.5. However, under other experimental conditions, the absorptions of N, P, and K were unaffected by pH level and Al concentration. The results implied that Neyraudia reynaudiana had high use efficiencies for N, P, and K under stresses of acidity and Al. Therefore, it can be concluded that Neyraudia reynaudiana have strong resistance to the stresses of acidity and Al and is a good species for revegetation in acidic soil regions or mine areas. |
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