ASSESSMENT THE GROWTH DYNAMICS OF SOYBEAN YIELD AGRO-ENVIRONMENTAL CATEGORIES
Journal Title: Вісник Одеського національного університету. Географічні та геологічні науки - Year 2014, Vol 19, Issue 4
Abstract
In this paper a model of assessment the growth dynamics of soybean yield agro-ecological categories was proposed and a generalized characteristic of agro-climatic conditions of soya cultivation productivity in the forest-steppe zone of the Ukraine was performed. Purpose. Soybean is the most common, legume and oilseed crop of our planet. This thermopiles leguminous plant is the short-day plant of the monsoon climate. Subject of the study. Regularities of the agro-climatic conditions influence on the formation of agro-ecological levels of soybean yield. Purpose of the work is to develop a model and assess the impact of agro-climatic conditions on the soybean yield formation and modeling this influence. Methodology. The theoretical basis of the study was to use the basic model of the assessment of agro-climatic resources of crops productivity formation by A.N. Polevoy, based on H.G.Tooming concept about the maximum crop productivity. The model is based on the concepts of four levels of agro-ecological yield categories: potential yield (PY), meteorologically possible yield (MPY), actually possible yield (APY) and yield in the production (YP). Also we will consider the generalized characteristics of cultivation agro-climatic conditions: degree of favoring meteorological conditions of crop cultivation and efficiency of agro-climatic resources use. On the basis of mean annual meteorological and agro-meteorological data, as well as using information on organic and mineral fertilizers application, the formation of different agro-ecological levels of soybean yields in the Ukraine was modeled. Finding. Calculated values allowed us to estimate the dynamics of PY, MPY, APY and YP growth and the course of decadal sums of PAR during the growing season, which were calculated for forest-steppe zone of the Ukraine. The maximum value of PY, MPY, APY, YP growth and PAR sums reached in the eighth decade and are 225.7 g/m2 ∙ dec., 208.9 g/m2 ∙ dec., 126.9 g/m2 ∙ dec., 43.4 g/m2 ∙ dec. and 11.8 kJ/ cm2 ∙ dec. respectively. By the end and PAR sums of the growing season the growths and PAR sums are reducing. Calculated values allowed us to estimate the dynamics of hydrothermal regime of soybeans. Evapotranspiration (E) and evaporation (E0) have a well-defined trend. With increasing air temperature and precipitation the evapotranspiration may increase or decrease. The ratio of evapotranspiration to evaporability (E/E0) characterizes moisture availability of crops and varies from 0.83 relative units to 0.6 relative units by the end of the growing season. On the basis of calculations made the assessment of generalized characteristics of agroclimatic conditions and productivity of soybean cultivation in the forest-steppe zone of the Ukraine. The highest values of grain MPY, grain APY, grain YP observed in forest-steppe areas, the lowest values are typical for areas of Southern Steppe. The highest degree of favoring the meteorological conditions (Km) for soybean cultivation observed in Polesye, the smallest value (Km) is in Southern Steppe. The assessment of the level of agro-climatic resources use efficiency (Kakl) for soybean cultivation showed that the highest value observed in the forest-steppe areas, the lowest value is in Northern Steppe. Conclusions. Thus, using the simulation we evaluated the impact of agro-climatic conditions on the dynamics of agro-ecological yield growth levels of soybean crop and estimated agro-ecological categories of grain yield, as well as estimated degree of favoring agro-climatic conditions for the soybean cultivation in the forest-steppe areas of the Ukraine.
Authors and Affiliations
A. V. Tolmachova
Keywords
Related Articles
- EP ID EP400188
- DOI -
- Views 68
- Downloads 0
HYDROGEOLOGICAL CONDITIONS AND FEATURES FORMATION OF GROUNDWATER SARMATIAN AQUIFER IN THE SOUTHWESTERN PART OF ODESSA REGION
One of the main economic problems of the south-western region of Odessa region is the provision of high-quality drinking water. Fresh underground drinking water in this territory are practicaly absent. Water for drinking...
MODERN THREATS TO NATURAL FOREST LANDSCAPES IN THE SOUTH WEST REGION OF CAMEROON: THE CASE OF THE CAMEROON MOUNTAIN
The article reviews the natural and anthropogenic factors that have influenced the rapid deforestation and degradation of the forest landscapes of the Mount Cameroon ecosystem. One of the greatest riches of Cameroon in a...
THE EFFECT OF ANTHROPOGENIC FACTOR ON THE MODERN CONDITION OF ACCUMULATIVE FORMS OF RELIEF OF THE NORTH-WESTERN PART OF THE BLACK SEA
Problem Statement and Purpose. In recent decades there has been increasing development of the coastal zone of the Black sea. This entails active intervention in the natural system of the coastal zone, particularly strong...
THE ASSESSMENT OF CAPABILITIES OF A SPATIAL GIS‑REALIZED MODEL OF RATIONAL LAND RESOURCES USE
Purpose. One of the most reasonable mathematical models of rational land use is a logical and mathematical model, which was proposed by H. I. Shvebs. The modern spatial version is realized in the GIS. The purpose of curr...
WATER SALINITY IN TILIGUL LIMAN IN AUTUMN 2015 (THE BLACK SEA COAST)
Purpose. Along the Black Sea coast different limans (nearshore lakes) content the valuable recreational resources. And can to use for increasing of valuable of fish species. Correspondingly, salinity changing is signific...