Effect of cultivar and potassium silicate and the interaction between them on the percentage of NPK, the percentage of calcium, the content of capsaicin and the content of protein in the fruits

Abstract

The experiment was conducted in a field in Al-Azzawiya region - Al-Musayyib district (40 km) north of the center of Babylon province, during the spring agricultural season 2022 within the longitude 44.07° and latitude 32.76°. The experiment included two factors, the first being two cultivars of sweet pepper, the first being the imported cultivar, California Wonder, and the second being the local cultivar. The second factor was the use of two concentrations of potassium silicate (3.5) ml. L^-1 in addition to the control treatment,The experiment was conducted using a randomized complete block design, according to the split plot system, with three replicates. The items were placed in the main plot and sprayed with potassium silicate in the system sub-plot. Means were compared using the Least Significant Difference test.L.S.D. at the probability level of 0.05. The results of the table showed that the imported cultivar California Wonder achieved a significant superiority over the local cultivar in traits of phosphorus 0.47%, potassium 1.24%, calcium 0.54% in fruits. Nitrogen 1.60%, phosphorus 0.62%, potassium 0.79% in leaves and protein 9.32% in fruits. While the local cultivar achieved the highest percentage of nitrogen 1.46% and the fruit content of vitamin C 117.10 mg.100g ^-1 fresh weight, the two cultivars also achieved a significantly excelled in the fruit content of carbohydrates 2.91% and capsaicin 0.29gm.100g ^-1.  Also achieved spraying treatment at a concentration of 5 ml. L^-1 with potassium silicate had a significantly excelled in the percentage of phosphorus 0.47%, potassium 1.30%, calcium 0.55% in fruits, and the fruit content of vitamin C reached 117.75 mg. 100g-1 fresh weight, nitrogen 1.65%, phosphorus 0.64%. Potassium 1.83%, calcium 0.80% in the leaves and capsaicin 0.30 g. L^-1 excelled in nitrogen in fruits 1.46%,Carbohydrates 3.02% and protein 9.37%. Also, the bi-interaction was achieved between the imported cultivar California Wonder and spray at a concentration of 5 ml / L.It excelled in the proportion of phosphorus in fruits 0.49%, the percentage of potassium in fruits 1.34%, the percentage of calcium in fruits 0.56%,The percentage of nitrogen in the leaves is 1.70%, the percentage of phosphorus in the leaves is 0.65%, the percentage of potassium in the leaves is 1.85%, the percentage of calcium in the leaves is 0.83%, and the percentage of capsaicin in the fruits is 0.30 g. Also, the local cultivar and spray at a concentration of 5 ml / L achieved a significant superiority in the fruit content of vitamin C 118.03 mg. 100g^-1 fresh weight,  While the imported cultivar California Wonder with spraying at a concentration of 3 ml.L^-1 achieved a significantly excelled in the fruit content of protein 9.45%.