Micronutrient deficiencies in teak (Tectona grandis) seedlings: foliar symptoms growth performance and remedial measures

Sujatha M. P., . Micronutrient deficiencies in teak (Tectona grandis) seedlings: foliar symptoms growth performance and remedial measures. pp. 29-37. ISSN 0128-1283

Considering the constraints in diagnosing nutrient disorders encountered in teak seedlings a study was conducted to induce deficiency symptoms of Fe Cu Zn Mn Mo and B and to find out its impact on growth performance and nutrient concentration by adopting the sand culture technique. According to the results deficiency of nutrients caused the development of certain symptoms which were specific to each nutrient. Deficiencies of Mo and Cu caused considerable reduction in plant height whereas development of healthy new leaves was seriously affected by Fe and B deficiencies. The order of abundance of micronutrients in teak seedlings was Fe Mn Zn Cu and in general there was no uniform and definite relation between the concentration of nutrients (except Cu) and the expression of deficiency symptoms. In the case of Cu there was a gradual decreasing trend in its concentration with the expression of deficiency symptoms. Results of the study suggest that total foliar concentration cannot be used as a reliable indicator in the deficiencies of Fe Zn and Mn. Trials to rectify the deficiency symptoms revealed that recovery was fast and easy if the respective nutrients were applied at the early stage of deficiency. Foliar spray of 0.3 FeSO4 1 Bordeaux mixture 0.1 ZnSO4 0.1 MnSO4 0.1 MoO3 and 0.05 boric acid were found to be effective in rectifying the deficiency of Fe Cu Zn Mn Mo and B respectively.

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Abstract

Considering the constraints in diagnosing nutrient disorders encountered in teak seedlings a study was conducted to induce deficiency symptoms of Fe Cu Zn Mn Mo and B and to find out its impact on growth performance and nutrient concentration by adopting the sand culture technique. According to the results deficiency of nutrients caused the development of certain symptoms which were specific to each nutrient. Deficiencies of Mo and Cu caused considerable reduction in plant height whereas development of healthy new leaves was seriously affected by Fe and B deficiencies. The order of abundance of micronutrients in teak seedlings was Fe Mn Zn Cu and in general there was no uniform and definite relation between the concentration of nutrients (except Cu) and the expression of deficiency symptoms. In the case of Cu there was a gradual decreasing trend in its concentration with the expression of deficiency symptoms. Results of the study suggest that total foliar concentration cannot be used as a reliable indicator in the deficiencies of Fe Zn and Mn. Trials to rectify the deficiency symptoms revealed that recovery was fast and easy if the respective nutrients were applied at the early stage of deficiency. Foliar spray of 0.3 FeSO4 1 Bordeaux mixture 0.1 ZnSO4 0.1 MnSO4 0.1 MoO3 and 0.05 boric acid were found to be effective in rectifying the deficiency of Fe Cu Zn Mn Mo and B respectively.

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Item Type:	Article
AGROVOC Term:	Micronutrients
AGROVOC Term:	Nutrient deficiencies
AGROVOC Term:	Tectona grandis
AGROVOC Term:	Teak
AGROVOC Term:	Foliar diagnosis
AGROVOC Term:	Seedlings
AGROVOC Term:	Nutrient elements
AGROVOC Term:	Salicylic acids
AGROVOC Term:	Hydrogen peroxide
AGROVOC Term:	Contamination
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:27
URI:	http://webagris.upm.edu.my/id/eprint/21700

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