Calculation of photosynthetical active radiation in the conditions of Kazakhstan

Abstract

The  object  of  the  research  is  agrocenosis  of  the  Zhambyl  region of the Republic of Kazakhstan. The studies were carried out with the purpose of improving the method of  assessment  of  impact  of  solar  energetic  resources  on  the  growth  and  development  of  agricultural crops. The aims of the investigations included: modeling of the production process forming the harvest; forecast of possible yields in different climatic conditions and possibilities of optimization of the formation process of the yield; development of the method of determination of productivity of biomass corn crop depending on the on the value of photosynthetically active radiation (PAR). The fulfilled studies showed that the proposed method of determination of the biomass of agricultural crops allows obtaining without additional  equipment  local  information  on  the  receiving  solar  energy  as  a  basis  for  photosynthesis. The experimental data of calculation of the corn biomass when growing on silo promoted to the yield of 542-634 c/ha. The dry biomass productivity is in the range of 101.2-154.5 c/ha, which is close to the index of usage PAR – 55-84%.