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The rhizosphere pH change ofPinus koraiensis seedlings as affected by N sources of different levels and its effect on the availability and uptake of Fe, Mn, Cu and Zn

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Abstract

Dark brown forest soil was collected from the upper 20 cm soil layer in Changbai Mountain Research Station of Ecosystem, Chinese Academy of Sciences. The soil was amended with two different forms of nitrogen fertilizers: NO3 as Ca(NO3)2, NH4 + as NH4Cl at the concentrations of 50, 100, 200 and 400 mg kg−1respectively. The experiment was carried out with 2-yr-oldPinus koraiensis seedlings in pot. The pH change of rhizosphere soil and the contents of available Fe, Mn, Cu, and Zn in soil and leaves were analyzed. The result indicated that the addition of NH4-N decreased the rhizosphere pH value, while the addition of NO3-N increased the rhizosphere pH value in contrast with the control treatment. The direction and extent of the pH change mainly depended on N source and its concentrations applied. The rhizosphere pH change had a remarkable influence on the availability of the micronutrients in the rhizosphere, and thereafter affected the nutrient uptake by the seedlings. The contents of available mineral nutrients had a negative correlation with the pH value in the rhizosphere soil. The contents of available mineral nutrients in leaves were positively correlated to the levels of the available nutrients in the rhizosphere soils.

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Authors and Affiliations

  1. Institute of Applied Ecology, Chinese Academy of Sciences, 150016, Shenyang, P. R. China

    Chen Yong-liang, Han Shi-jie & Zhou Yu-mei

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  1. Chen Yong-liang
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  2. Han Shi-jie
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  3. Zhou Yu-mei
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Additional information

Foundation item: This paper was supported by National Natural Science Foundation of China (Grant No. 30170167).

Biography: CHEN Yong-liang (1969-), male, Ph. Doctor, lecture of Northeast Forestry University, Harbin 150040, Post-doctor in Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, P. R. China.

Responsible editor: Song Funan

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Yong-liang, C., Shi-jie, H. & Yu-mei, Z. The rhizosphere pH change ofPinus koraiensis seedlings as affected by N sources of different levels and its effect on the availability and uptake of Fe, Mn, Cu and Zn. Journal of Forestry Research 13, 37–40 (2002). https://doi.org/10.1007/BF02857143

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  • DOI: https://doi.org/10.1007/BF02857143

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