Influence of nutrient application rate on growth and rooting potential of the West African hardwood Triplochiton scleroxylon

McP. Dick , J., Leakey, R.R.B., McBeath, C., Harvey, F., Smith, R.I., and Woods, C. (2004) Influence of nutrient application rate on growth and rooting potential of the West African hardwood Triplochiton scleroxylon. Tree Physiology, 24 (1). pp. 35-44.

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Abstract

Effects of stock plant nutrition on growth and subsequent rooting of leafy stem cuttings of the commercially important west African tree Triplochiton scleroxylon K. Schum. were investigated to identify the primary morphological variables influencing adventitious root formation. Potted plants were watered as required with one of four balanced nutrient solutions (0, 15, 63 or 125 mg N l–1). Increasing the nutrient supply to stock plants increased growth rate and rate of adventitious root production of subsequently harvested cuttings, but an optimum nutrient regime was not identified. Rooting percentage increased from 27% in cuttings harvested from stock plants receiving a low nutrient supply to 64% for cuttings harvested from stock plants receiving eight times the amount of nutrients extractable from plants under typical field conditions in West Africa. The ability of a cutting to retain its leaf during propagation and the length of the cutting were the primary measured characteristics associated with rooting and accounted for 43% of the variance fitted in the model. The length of the new shoot, total leaf area and within-shoot position (node position) were also significantly associated with rooting. After these characteristics were fitted to the model, the genetic origin (clone) was not statistically significant. We conclude that genetic variation in rooting potential is mediated through variations in morphological and physiological traits, rather than through genetic variation in cell differentiation or related aspects of root initiation.

Item ID: 7226
Item Type: Article (Research - C1)
ISSN: 1758-4469
Keywords: nutrient application rate; rooting potential; Triplochiton scleroxylon; west African hardwood; genetic variation; photosynthesis; vegetative propagation
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Date Deposited: 26 Mar 2010 00:14
FoR Codes: 07 AGRICULTURAL AND VETERINARY SCIENCES > 0799 Other Agricultural and Veterinary Sciences > 079999 Agricultural and Veterinary Sciences not elsewhere classified @ 100%
SEO Codes: 82 PLANT PRODUCTION AND PLANT PRIMARY PRODUCTS > 8202 Horticultural Crops > 820214 Tropical Fruit @ 51%
82 PLANT PRODUCTION AND PLANT PRIMARY PRODUCTS > 8202 Horticultural Crops > 820299 Horticultural Crops not elsewhere classified @ 49%
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