Effect of growth regulator (ATONIK) and Zn-Nano-fertilizer on Yield and Physiological Parameters of sweet pepper

Abstract

A field experiment was conducted in the non-heated plastic house at special field at (44° 27′ east 32° 35′ north) coordinate for the autumn season 2022 to study the response of sweet pepper (Qurtuba cultivar) Capsicum annuum L. to foliar spraying with growth regulator ( Atonik ) and Nano-zinc in sandy loam soil. A factorial experiment was designed according to RCBD design, and the average compared using LSD at significant level of 5%. The growth regulator ( Atonik ) at four levels (0, 25, 50, and 75 mg L^-1) and four levels of Nano-Zinc fertilizer (0, 2, 4, and 6 gm L^-1) with three replicates, the results indicated to the excelling of the spraying treatment by growth regulator at level (75 mg L^-1) which significantly increased the number of fruits per plant, fruit weight, early and total yield of plant, fruit vitamin C , total solube solid (T.S.S), total soluble phenols, and soluble saccharides with an average of ( 33.8 fruit , 81.5 gm , 0.70 kg , 2.80 kg , 52.60 mg 100gm^-1 fresh weight , 8.63% , 5.83 mg gm^-1 fresh weight , and 9.65% ) for the above parameters sequentially. which is the same behavior as the spraying of Nano-Zinc at a concentration of (6 gm L^-1) for the parameters above with an average ( 33.9 fruit , 78.2 gm , 0.69 kg , 2.79 kg , 49.70 mg 100gm^-1 fresh weight , 8.03% , 5.76 mg gm^-1 fresh weight , and 9.23% ) sequentially as compared to the control treatment. As for interaction treatments, it showed excelling the interaction spraying treatment (75 mg L^-1  +  6 gm L^-1) by giving it the highest values for all the above parameters.