Effects of calcium, boron and nitrogen fertilization on the growth of teak (Tectona grandis) seedlings and chemical property of acidic soil substrate |
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| Authors: | Zaizhi Zhou Kunnan Liang Daping Xu Yuchen Zhang Guihua Huang Huaming Ma |
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| Institution: | (1) Research Institute of Tropical Forestry, Chinese Academy of Forestry, Longdong, Guangzhou, 510520, People’s Republic of China |
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| Abstract: | Many teak plantations are established on acidic soils with low nutrient availability. There is also poor documentation of
nutrient budgets for teak, therefore, a pot experiment with optimal hybrid regression design (Roquemore R311A) was implemented
with calcium, boron and nitrogen treatments with teak seedlings (Tectona grandis L.f.) planted in acidic lateritic red soil substrate. Seedling growth, biomass production and root development, and soil
pH, and exchangeable Ca and Al concentration were measured. Plant height, root collar diameter, biomass of leaves, stems and
roots, root volume, taproot length, number of lateral roots of teak seedlings were significantly and positively correlated
with soil exchangeable Ca, pH and Ca/Al molar ratio, and negatively correlated with exchangeable Al. All growth traits were
significantly affected by calcium, nitrogen and their interaction, but B fertilizer and other interactions had insignificant
effects. To effectively cultivate teak seedlings in acidic soil substrates, 1.68 g kg−1 quicklime (CaO) and 0.65 g kg−1 urea was suggested to be added to neutralize soil acidity, and enhance soil exchangeable Ca content and Ca/Al molar ratio.
Urea should not be added without quicklime. |
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