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Allelopathic Effects of Humus Soil of Platycladus orientalis Forests on Understory Plants in the Loess Plateau, China


Affiliations
1 Institute of Soil and Water Conservation, Northwest A&F University, Yangling-712100, China
2 College of Natural Resources and Environment, Northwest A&F University, Yangling-712100, China
3 Key Laboratory of Plant Nutrition and the Agri-Environment, Northwest China, Ministry of Agriculture, Yangling-712100, China
4 College of Forestry, Northwest A& F University, Yangling-712100, China
 

Allelopathic effect of humus soil of mono-species-community on the understory plants was a critical problem in the mixed reformation of planted pure forests. In order to investigate the practical allelopathic effect of humus soil of Platycladus orientalis forest on understory plants in the Loess Plateau of China and provide a scientific basis for its future management, humus soils of P. orientalis forests in the hilly (north) and gullied (south) areas of the Loess Plateau were sampled separately for pot experiment of 10 common species of shrubs and grasses, and seed germination, seedling growth and physiological indexes were measured during the whole test. According to the comprehensive analysis, humus soil of P. orientalis forest in the hilly area showed obvious allelopathic inhibition on Medicago sativa, Melilotus officinalis, Vicia villosa and Astragalus adsurgens; while in the gully area, it showed obvious allelopathic inhibition on M. officinalis, V. villosa and Coronilla varia. Species which are inhibited by allelopathic effects should be avoided choosing, to form mixed vegetation with P. orientalis.

Keywords

Allelopathy, Humus Soil, Platycladus orientalis, Understory Plants.
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  • Allelopathic Effects of Humus Soil of Platycladus orientalis Forests on Understory Plants in the Loess Plateau, China

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Authors

Xiao-Xi Zhang
Institute of Soil and Water Conservation, Northwest A&F University, Yangling-712100, China
Bo-Chao Zhu
College of Natural Resources and Environment, Northwest A&F University, Yangling-712100, China
Zeng-Wen Liu
Key Laboratory of Plant Nutrition and the Agri-Environment, Northwest China, Ministry of Agriculture, Yangling-712100, China
Yuan-Hao Bing
College of Forestry, Northwest A& F University, Yangling-712100, China
Xiao-Bo Liu
College of Forestry, Northwest A& F University, Yangling-712100, China
Xiao Liang
Institute of Soil and Water Conservation, Northwest A&F University, Yangling-712100, China

Abstract


Allelopathic effect of humus soil of mono-species-community on the understory plants was a critical problem in the mixed reformation of planted pure forests. In order to investigate the practical allelopathic effect of humus soil of Platycladus orientalis forest on understory plants in the Loess Plateau of China and provide a scientific basis for its future management, humus soils of P. orientalis forests in the hilly (north) and gullied (south) areas of the Loess Plateau were sampled separately for pot experiment of 10 common species of shrubs and grasses, and seed germination, seedling growth and physiological indexes were measured during the whole test. According to the comprehensive analysis, humus soil of P. orientalis forest in the hilly area showed obvious allelopathic inhibition on Medicago sativa, Melilotus officinalis, Vicia villosa and Astragalus adsurgens; while in the gully area, it showed obvious allelopathic inhibition on M. officinalis, V. villosa and Coronilla varia. Species which are inhibited by allelopathic effects should be avoided choosing, to form mixed vegetation with P. orientalis.

Keywords


Allelopathy, Humus Soil, Platycladus orientalis, Understory Plants.