Published date: Mar 10 2019

Journal Title: KnE Life Sciences

Issue title: The UGM Annual Scientific Conference Life Sciences 2016

Pages: 255–261

DOI: 10.18502/kls.v4i11.3871

P Lestaripujilestari@ugm.ac.id

H H Nurjanto

E Faridah

Teak (Tectona grandis Lf.) is prominent species which has been planted in Indonesia for a long time. Its silviculture technique also has been known well, such as planting system, pruning, and thinning. However, identification of morphology symptom as the response to deficiency and excessive nutrient is still lack. Observing morphology symptom is the easiest, cheapest, and fastest method to identify nutrient necessary for
teak. This research aims to identify preliminary morphology symptom of teak at various levels concentration of Calcium (Ca), Magnesium (Mg), and Sulfur (S). This research was conducted in greenhouse, Intensive Silviculture Laboratory, Faculty of Forestry, Universitas Gadjah Mada started from June to September 2016. The experimental design was completely randomized design with eight treatments with tree replications as follows: control (without nutrient), complete (macronutrient 100 %), Ca1 (Calcium 0 %), Ca2 (Calcium 200 %), Mg1 (Magnesium 0 %), Mg2 (Magnesium 200 %), S1 (Sulfur 0 %), S2 (Sulfur 200 %). The preliminary symptom observed on leaves after teak stump treated for three months. The result showed that omission and addition of macronutrient resulting specific morphology symptom especially leaves.

Keywords: Calcium, Magnesium, Morphology symptom, Sulfur

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