Notes: Growth and Nutrient Requirements in a Teak Plantation Age Series in Nigeria. II. Nutrient Accumulation and Minimum Annual Requirements
Samples of 40 trees chosen to represent the age and diameter range during the first 15 years of growth of some quality I teak(Tectona grandis L. f.) plantations were analysed for N, P, K, Ca, and Mg. Both accumulation and annual requirements of these nutrients by the aboveground biomass increased throughout the period. After 15 years of growth, the stand whose dry weight was about 592 mt/ha contained about 2,980 kg of K, 2,228 kg of Ca, 1,788 kg of N, 447 kg of P, and 377 kg of Mg per hectare. The minimum annual nutrient requirements at the same age were estimated as 556 kg of K, 328 kg of N, 357 kg of Ca, 76 kg of P, and 62 kg of Mg per hectare. The distribution of all the elements followed a similar trend and varied with stand age. Proportion channelled to foliage decreased while those to trunk and branches increased with age. The silvicultural implications of this differential distribution and the degree of harvest on site nutrient budgets are discussed. Forest Sci. 30:35-40.
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Keywords: Tectona grandis
Document Type: Miscellaneous
Affiliations: Reader (Silviculture), Department of Forest Resources Management, University of Ibadan, Ibadan, Nigeria
Publication date: 1984-03-01
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