African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12353

Full Length Research Paper

Growth and physiological responses to water and nutrient stress in oil palm

Cheng-xu Sun1, Hong-xing Cao1*, Hong-bo Shao2,3*, Xin-tao Lei1 and Yong Xiao1
  1Hainan Key Laboratory of Tropical Oil Crops Biology , Coconut Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wenchang 571339, Hainan,China. 2The CAS/Shandong Provincial Key Laboratory of Coastal Environmental Process, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences(CAS), Yantai 264003,Shandong, China. 3Institute for Life Sciences, Qingdao University of Science and Technology(QUST), Qingdao266042, Shandong, China
Email: [email protected], [email protected]

  •  Accepted: 11 July 2011
  •  Published: 30 September 2011

Abstract

 

The research was conducted to detect changes in growth, physiology and nutrient concentration in response to two watering regimes (well-watered and water-stress conditions) and to two nutrient regimes (with or without fertilization) of oil palm. Under stress conditions, changes in plant growth, dry matter allocation, relative water content, leaf relative conductivity, leaf N, P and K concentration are usually observed. These characteristics and related parameters were determined and the experiment results are listed as follows: (1) fertilization promoted the growth of oil palm under well-watered conditions, while under water stress conditions its effects on growth was negative. The ratio of root/shoot was increased under water stress condition; (2) relative water content and chlorophyll a/b content were gradually decreased while leaf relative conductivity was increased quickly under water and nutrient stress conditions during the experiment. It is obvious that water stress had a greater influence than nutrient stress on these parameters; (3) water and nutrient stress decreased leaf nitrogen and phosphorus concentration but increased potassium concentration; the combination of water and nutrient stress made significant effects on nitrogen and phosphorus concentration, but no significant effects on potassium concentration. Moreover, deficiency of both water and nutrients in combination had the greatest impact on changes in these traits of oil palm.

 

Key words: Plant growth, physiology response, nutrient concentration, water stress, nutrient stress.