Allometric equations for biomass and contents of macronutrients in a young Tectona grandis stand

Soil characteristics and allometric models for biometric characteristics and nutrient amounts for high yielding “Bolaina” (Guazuma crinita) trees

“…In the case of accumulation of macronutrients in other tropical cultivated species, teak presented a similar trend to Guazuma : at younger ages (5 years), N > Ca > K > P > Mg > S; at later ages (10 years), Ca > N > K > Mg > P > S 40 , 41 . For six different Eucalyptus (age 3.5 years) genotypes the order was Ca > N > K > Mg > S > P at age 3.5 years 42 but in Europe at 18 years it was N > Ca > K > Mg > P 43 , so a shift of Ca for N demand was observed.…”

“…However, the logarithmic and logistic models have shown very good results for estimating all the variables, especially for trunk and total weight in Guazuma crinita, indicating that their use may be interesting in further research with this species. In the case of accumulation of macronutrients in other tropical cultivated species, teak presented a similar trend to Guazuma: at younger ages (5 years), N > Ca > K > P > Mg > S; at later ages (10 years), Ca > N > K > Mg > P > S 40,41 .…”

“…Cultivated soils with this species presented high Ca, and sometimes also CaCO 3 (in low concentrations of < 2%), which could partly explain these higher concentrations. However, some forest species have been reported as high Ca-demanding species, such as teak (Tectona grandis), caoba (Swietenia macrophylla), Pinus patula and others 17,41 . Calcium is an important nutrient in plants for their growth and development because it forms important structural molecules, such as the cell wall and membranes 49 , and participates actively in metabolism as a secondary messenger, the oscillatory concentrations in cytosolic Ca 2+ being the signal for responses to abiotic and biotic stress [49][50][51] and its sufficiency in tropical woody plants such as Guazuma being important for its survival and establishment in this highly competitive environment.…”

Effect of liming and fertilizers on the growth and nutrition of 12-month old Teak (Tectona grandis L.) grown on acidic soil of Peru

“…Teak (Tectona grandis L.) grows naturally in tropical regimes and is characterized by its hardwood that is important economically and socially because it represents nearly 1.5% -2% of the global cover of planted forests (Fernández-Moya et al, 2014). Also, this species is considered of slow growth since it takes around 20 years for its harvest in comparison to other forestry trees such as Eucalyptus; therefore, allometric models have been developed for this species in order to facilitate monitoring of growth and biomass (Dos Santos et al, 2022). Nevertheless, recent research has shown that wood density with half of currently harvest age (24 years) had no significant differences (Shukla & Viswanath, 2023) which could mean in the future a faster harvest age.…”