Abstract
Soil samples were taken from rhizosphere zone and off-rhizosphere zone of ash (Fraxinus mandshurica Rupr.) and larch (Larix olgensis Henry) in mixed and monoculture stands, and the nutrient concentration of N, P, and K was analyzed to study the effect of nutrients variation on yield improvement in the mixed stand. The result showed that: 1) The stand level total soil N concentration and available N in the mixed stand was similar to that in the monoculture stand of ash, but higher than that in monoculture stand of larch. The total N and available N concentration in rhizosphere soil of ash in the mixed stand was similar to that in the monoculture stand of ash, but the available N concentration in rhizosphere of larch in mixed stand was much higher than in its monoculture. 2) The stand level total P, total K concentration in the mixed stand was similar to that in monoculture stands of both species, but available P and K was more concentrated in the mixed stand than in the monoculture stands of ash. The rhizosphere available P and K of ash in the mixed stand was 44.1% and 13.5% (for the 9-yr-old stands) and 79.6% and 25.6% (for the 21-yr-old stands) higher than that in its monoculture. The improvement of soil P and K availability in the mixed stand is concluded.
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Foundation item: This study was supported by National Natural Science Foundation of China (Grant No. 30130160), and the Quick Response of Basic Reserch Supporting Program (Grant No. 2102)
Biography: ZHANG Yan-dong (1963-), male, Ph. D., associate professor in College of Forest Resources and Environment, Northeast Forestry University, Harbin 150040, P. R. China.
Responsible editor: Song Funan
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Yan-dong, Z. The variation of nutrient concentration in the rhizosphere of larch and ash in mixed and monoculture stands. Journal of Forestry Research 13, 269–272 (2002). https://doi.org/10.1007/BF02860089
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DOI: https://doi.org/10.1007/BF02860089