Growth Response and Photosynthetic Activity of Tejakula Tangerine (Citrus Reticulata CV. Tejakula) On the Application of Different Fertilization Package

Optimization of vegetative growth and photosynthetic activity of Tejakula tangerine requires appropriate nutrition, which can be met with a combination of fertilization. This study aims to find a combination of fertilization packages between organic fertilizers, macro and micro fertilizers, mycorrhizal biofertilizers and probiotic POC fertilizers that can provide the best growth response and photosynthetic activity in Tejakula tangerine plants. The study was conducted using a Randomized Block Design (RAK) with one treatment factor of the fertilization package consisting of three levels, namely: 1. Organic fertilizer (Po), 2. Organic fertilizer + macro and micro fertilizers (Ph), 3. Organic fertilizer + macro and micro fertilizers + mycorrhizal biofertilizer + probiotic POC fertilizer (Pc). Each treatment was repeated ten times, so that 30 experimental plant units were obtained. The results of the analysis of variance showed that the fertilizer package treatment had a very significant effect on the variables of the increase in the number of primary branches and leaf color, and had a significant effect on the variables of the increase in plant height, increase in stem diameter, leaf thickness and leaf chlorophyll content, but had no significant effect on the variables of the ratio of leaf length and width, relative water content (RA) of leaves and the microclimate of the research site. The Pc fertilizer package affected the growth of Tejakula tangerine very significantly on leaf color (3.88 BWD units), had a significant effect on the increase in plant height (72.10 cm) and the increase in the number of leaves (1.211 strands) and provided the highest photosynthesis rate (4.97%).