Effects Of Different Nitrogen Fertilizer Levels On Yield And Biological Characteristics Of Local Pepper Varieties In Tibet

There are many local varieties of Capsicum annum L.in Tibet,and"LANG county pepper"and"Yigong pepper"have been protected by the national agricultural product geographical indication registration in recent years.These pepper local varieties play a special role in the development of local characteristic industries.In order to promote the high quality and effective production of Tibetan pepper local varieties,three typical local varieties were selected in this study,and the current main cultivated Pepper Variety"Longmei 4（Y4）"was used as the control to carry out different nitrogen application research,and the main results were as follows:1.When no fertilizer was applied,the growth,yield and quality of the four cultivars were poor;2.When a certain amount of compound fertilizer was applied,the growth,yield and quality of the 4 varieties were effectively improved;3.When different amounts of nitrogen fertilizer were applied on the basis of a certain amount of chemical fertilizer,the growth,yield and quality of the four varieties showed great differences with the increase of nitrogen fertilizer use.On the whole,however,under T₁（8.44kg/667m²）dosage,plant height,door pepper height,fruit horizontal and vertical longitude and yield per plant had the best performance.The relative content of chlorophyll in leaves was the highest at T₂（16.85kg/667m²）,and the fruit quality was also the best;4.Under different fertilization conditions,four species have different reactions to the same fertilization,but the overall trend of reaction,synthesis of 4 varieties growth,yield and quality indexes such as the result of the increase of the nitrogen fertilizer,the T₁ and T₂（8.44 kg～16.85 kg/m²）of nitrogen fertilizer usage,four hot pepper varieties less fertilizer use or only use compound fertilizer has good yield,quality and the biological characteristics,is suitable for cultivation of nitrogen fertilizer.