Pedosphere 7(3): 243--249, 1997
ISSN 1002-0160/CN 32-1315/P
©1997 Soil Science Society of China
Published by Elsevier B.V. and Science Press
Growth responses of young slash pine (Pinus elliotti Engelm.) to N, P and K fertilizers in red-yellow soil in Jiangxi Province, China
CHEN Hong-Jun1, LI Yi-Quan1, CHEN Dao-Dong1 and HU Shi-Cai2
1 Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091 (China)
2 Fengshushan Forest Farm, Jiangxi, Jingdezhen 333000 (China)
ABSTRACT
      During 1991~1995, the growth responses of young slash pine to N, P and K fertilizers and rational rate and ratio of fertilizers in yellow-red soil at Fengshushan Forest Farm, Jiangxi Province were studied. N fertilizer decreased the growth of slash pine, while P not only significantly improved the increment of bottom diameter, height and crown diameter, but also caused earlier canopy closure of the stand. It also had a sustainable effect in the next two years. Slash pine had the most significant response to the treatment of 200 kg P2O5 ha-1, in which tree height, bottom diameter and crown diameter (EW and SN) were increased by 22%, 35%, 20% and 18% in 1994, 21%, 25%, 10% and 10% in 1995, respectively, compared to the control. Although there was no remarkable response to K fertilizer, good growth response to the application of 100 kg P2O5 plus 100 kg K2O ha-1 existed and tree height, bottom diameter and crown diameter (EW and SN) were increased by 31%, 14%, 23% and 21%, respectively, in 1993, compared to the control.
Key Words:  growth response to fertilizer, slash pine (Pinus elliottii Engelm.), young plantation
Citation: Chen, H. J., Li, Y. Q., Chen, D. D. and Hu, S. C. 1997. Growth responses of young slash pine (Pinus elliotti Engelm.) to N, P and K fertilizers in red-yellow soil in Jiangxi Province, China. Pedosphere. 7(3): 243-249.
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