Nitrogen Sources and Foliar Spray with Some Stimulants Affect Dry Weight, Yield and Fruit Quality of Sweet Pepper under Plastic Houses Conditions

Abstract

This work  was carried out during  2019/2020 and 2020/2021 winter seasons  in a private unheated  plastic  houses, Kom Haleen, Menia  El Qamh city, Sharkia Governorate, Egypt,  to evaluate  the effect of different  sources of  nitrogen fertilizers  and some growth stimulants  as foliar application on growth, yield and  fruit quality of  sweet pepper (Lirica RZ cv.)  grown in clay  soil  using  drip irrigation  system.

Results indicated  that,  the interaction between fertilization  sweet pepper plants with  vermicompost at 1.226 kg /m² (as organic  nitrogen 100%  ) and foliar spray with  compost tea  at 10 ml/l increased dry  weight of shoots/ plant, number of fruits/ plant ,  yield / plant and TSS contents in fruits followed by the interaction between vermicompost  and spraying with  vermicompost  tea at 7.5 ml/l at 100 days after transplanting in both seasons.  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  uptake by shoots, total sugars  in fruits  (%) and  vitamin C  in fruits , whereas  spraying with  vermicompost  at 7.5 ml/l  with the same fertilizer  increase  average  fruit weight        ( kg) , on the other hand, 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  fruits DM (%).