EFFECTS OF PHOSPHORUS, SILICATES AND CITRIC ACID ON GROWTH AND YIELD OF PEPPER IN GREENHOUSES
EFFECTS OF PHOSPHORUS, SILICATES AND CITRIC ACID ON GROWTH AND YIELD OF PEPPER IN GREENHOUSES
Keywords:
Capsicum annuum L., fertilizer,p2o5, potassium silicate.Abstract
The research was conducted in a plastic greenhouse at the College of Agricultural Engineering Sciences, University of Baghdad - Jadiriyah Campus, during the 2021-2022 season, to study the effect of phosphorus, silicon, and citric acid on pepper plants using a factorial experiment design with three replicates. The first factor had three levels of phosphorus (P2O5): 0 kg hectare-1 (P1), 160 (P2) and 320 kg h-1 (P3),the second factor had three levels of potassium silicate 0 kg h-1 (S1), 75 (S2) and 100 kg h-1(S3), and the third factor had four levels of citric acid 0 kg h-1 (C1), 2 (C2), 4 (C3) and 6 kg h-1 (C4). The results of the statistical analysis showed the superiority of the P3S2C4 treatment in increasing plant height (160.20 cm plant-1), the P2S3C3 treatment in leaf area (631.3 dm2 plant-1), the P2S3C4 treatment in the concentration of phosphorus in the leaf (0.470%), and the treatment P2S2C1 in the concentration of silicon in the leaf (18.50 ppm). The P3S3C4 treatment is the number of lateral roots (14.27 roots plant-1). The P2S3C4 treatment is the number of fruits (48.34 fruits plant-1) and the P3S3C4 treatment is the plant yield (3.48 kg plant-1).
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