ABSTRACT
X-ray fluorescence analysis is widely used for studying mineral element content in the biomass of various woody plants. Different methods for research of the various aspects of mineral nutrition, accumulation and distribution of micro- and macro elements in woody plants exist. The content of the most important elements in woody plants can be determined by inductively coupled plasma mass spectrometry. The measurements were carried out in media prepared by dissolving wood samples in concentrated nitric acid and then diluting them with water. The study of plant respiration is carried out by analogous methods and instruments, that the study of photosynthesis. The method of fast weighing, or Ivanov’s method is the most simple and convenient method of determining the intensity of transpiration. The method involves weighing cut leaves for short periods of time. Changes to the mass of the sheet should be considered prior to its wilting.
