الفهرس 
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Abstract
This experiment was carried out during winter seasons of 2019/2020 and 2020/2021 in a private unheated plastic houses, Kom Haleen, Menia El Qamh Distract, Sharkia governorate, Egypt to study the effect of different sources of nitrogen fertilizers (mineral compost, vermicompost, farmyard manure (FYM) and vermicompost FYM and some growth stimulants as foliar application (compost tea at 10 ml/l, vermicompost at 7.5 ml/l and mixture f nano micronutrients) on growth, yield and fruit quality of sweet pepper (Lirica RZ cv) grown in clay soil using drip irrigation system. Results showed that, the interaction between fertilization sweet pepper plants with vermicompost at 1.225 kg/m2 (as organic nitrogen 100%) and foliar spray with compost tea at 10 ml/l increased dry weight of leaves, stems and shoots/plant, number of fruits/ plant, total yield/plant and TSS content in fruits followed by the interaction between vermicompost and spraying with vermicompost tea at 7.5 ml/l at 80 and 100 days after transplanting in both seasons. Generally, the interaction between fertilization plants with vermicompost +FYM at 0.613+2.100 kg /m2 as organic nitrogen (50% +50% of each) and spraying with compost tea at 10 ml/l increased N, P and K by leaves and stems, total uptake of N,P and K by shoots and average fruit weight, while the interaction between fertilizing with ammonium nitrate at 0.085 kg/m2 and spraying with compost tea at 10 ml/l gave the highest values of dry matter (%) and total sugars (%) in fruits.