Biomasa, prolina y parámetros nitrogenados en plántulas de nogal bajo estrés hídrico y fertilización nitrogenada

this study was conducted to measure nitrogen concentration and response to water stress in pecan seedlings [carya illinoinensis (wangenh) c. koch]. the experiment consisted in observation of growth and development of plants started from western schley pecan seeds. seedlings were subjected to different treatments: irrigation with n supply, irrigation without n, water stress with n supply, and finally, and water stress without n. the following variables were assessed: plant height, trunk diameter, chlorophyll by spad and methanol, number of leaves and leaf area index, proline and biomass. the results showed that western schley pecan seedlings with n supply and water stress reduced the concentration of nt and n-no3 by 21.73 % and 61.84 % respectively, leaf area and trunk diameter by 53.4 % and 36.5 %, respectively, but increased proline content by 39.41 %. with irrigation and in the absence of n, chlorophyll content decreased by 20 % and stem biomass by 58.34 %. finally, the relative water content in stem and root decreased 61.54 % and 60.17%, respectively.