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Bulletin of Botanical Research ›› 2018, Vol. 38 ›› Issue (2): 225-231.doi: 10.7525/j.issn.1673-5102.2018.02.009

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Effects of Fertilization on the Vegetative and Reproductive Growth of Dalbergia odorifera T.Chen.

WANG Li-Yun1,2, LIU Xiao-Jin1, CUI Zhi-Yi1, XU Da-Ping1, YANG Zeng-Jiang1, ZHANG Ning-Nan1, HONG Zhou1, CHEN Jia-Tang2, HUANG Wei-Rong2   

  1. 1. Research Institute of Tropical Forestry, Chinese Academy of Forestry, Guangzhou 510520;
    2. Experimental Center for Subtropical Forestry, Chinese Academy of Forestry, Fenyi 336600
  • Received:2017-11-08 Online:2018-03-15 Published:2018-03-23
  • Supported by:
    The National Key Research and Development Program of China(2016YFD0600601);The Fundamental Research Funds for the Central Non-profit Research Institution of Research Institute of Tropical Forestry,Chinese Academy of Forestry(RITFYWZX201407);The Forestry Technology Innovation Program of Guangdong Forest Department(2016KJCX009)

Abstract: The experiment was conducted to study the fertilization on vegetative and reproductive growth of Dalbergia odorifera, and then provide useful suggestions for plantation management. The effects of Nitrogen(N, 185.6 g N per tree), Phosphorus(P, 120 g P2O5 per tree), Potassium(K, 120 g K2O per tree) as well as their mixtures(PK, 120 g P2O5 mixed with 120 g K2O per tree; NPK, 185.6 g N mixed with 120 g P2O5 and 120 g K2O per tree) on leaf growth, branch development, inflorescences set and biomass accumulation of a 8-year-old D.odorifera plantation were studied. There were significant differences on vegetative and reproductive growth of D.odorifera among these treatments(P<0.05). Nitrogen(N) treatment was helpful for vegetative growth of D.odorifera, and suitable for large-timber forest cultivation, because the ratio of vegetative branch, leaf number and leaflet width of vegetative branches were increased by 40.25%, 21.75% and 9.52%, and the inflorescence diameter and biomass were decreased by 12.75% and 48.63%, respectively. While P and P mixed with K were more appropriated for breeding purpose, because the ratio of vegetative branch was decreased by 47.96% and 46.84%, respectively. When N, P and K were mixed together(NPK), the vegetative and reproductive growth were both enhanced significantly(P<0.05), because the ratio of vegetative branch, length of vegetative branch, leaf number, leaflet length, leaflet width, branch biomass, inflorescence number and inflorescence biomass were increased by 26.04%, 68.16%, 32.98%, 15.20%, 11.40%, 83.60%, 54.20% and 49.84%, respectively. Thus, the vegetative and reproductive growth of D.odorifera can be regulated though formula fertilization(biased to N or P and K).

Key words: Dalbergia odorifera T.Chen., vegetative growth, reproductive growth, formula fertilization

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