PRODUCTIVITY OF SPRING DURUM WHEAT DEPENDING ON PRODUCTIVITY OF PREDECESSOR AND ATMOSPHERIC ARIDITY ON SOUTHERN CHERNOZEM (BLACKSOIL) IN THE STEPPE OF ORENBURG PRE-URALS

• Main Author: A. G. Kryuchkov
• Format: Article
• Language: Russian
• Published: Federal State Budgetary Scientific Institution “Agricultural Research Center “Donskoy”" 2018-05-01
• Series: Зерновое хозяйство России
• Subjects: modeling; coefficient; productivity; predecessor; variety; atmospheric aridity; stability (tolerance); spring durum wheat; equations; dependences
• Online Access: https://www.zhros.online/jour/article/view/256

On the territory of the Orenburg region spring durum wheat is traditionally the most important and economically valuable crop. For nearly 200 years its grain has been famous for its quality on the domestic and foreign markets. Because of its relatively low yield major problems were solved at the expense of the areas, which were 450-500 th.ha in average in 60-s – 80-s of the previous century. During the years of perestroika they were reduced, but even now the region ranks first in the country in the amount of areas (more than 200 th.ha). In Orenburg RI of Agriculture we gained a large amount of experimental data concerning cultivating technology of spring durum wheat, which needs creative use of received cultivating methods with taking into consideration of nature and cli-matic factors with application of methods of math modeling. The above mentioned type of research is now being carried out by a staff of the department of grain crop technologies with spring barley, spring durum wheat and soft (bread) wheat. They have been studying the crops on the basis of their own experimental trials since 1966.  In the age of computers it becomes really important to describe and cognate regularities of weather and agro technology effect on productivity of some crops and varieties. In the article the author who was the first to apply the methods of math modeling to ana-lyze the results of trials during 1987-1990, gives a series of equations, revealing present dependence of spring durum wheat productivity from coefficients of variety productivity and aridity degree. It allows using them for assessment of predecessors’ efficiency and varieties tolerance to aridity.