The consumption of moisture at cultivation of winter wheat on different predecessors in the southern zone of the Rostov regionой зоне Ростовской области
Pages: 4-9.
Alabushev A.V., corresponding member of the Russian Academy of Sciences, head of department,
Yankowskiy N.G., DSc in agriculture, leading researcher,
Ovsyannikova G.V., PhD in agriculture, leading researcher,
Popov A.S., PhD in agriculture, head of laboratory,
Sukharev A.A., PhD in agriculture, senior researcher
I.G. Kalinenko All-Russian Research Institute of Grain Crops, Zernograd, Russia
E-mail: vniizk30@mail.ru
The article presents the results of a study of soil water regime and use of soil moisture by winter wheat at the cultivation on such predecessors as black fallow and maize for silage in the southern zone of the Rostov region. The main source of winter wheat water supply is precipitation; therefore an analysis of meteorological conditions for 2004-2013 was carried out. Water regime of plants of winter wheat during years of research developed under the influence of different moisture supply. During the growing season (September-June) the demand of wheat in water provided with precipitation for 82%. The amount of precipitation satisfies the 100% needs in water only three years out of ten. The coefficient of moisture supply of winter wheat plants in different years varied on black fallow predecessor from a 0.67 to 1.41 units and on corn for silage predecessor from a 0.56 to 1.28. Best conditions of moisture supply on the predecessor black fallow promote to obtaining high grain yields – 4.79…7.00 t/ha depending on the year of studies. Grain yield of winter wheat on the corn predecessor did not exceed a 4.24…5.31 t/ha which is associated with a lower supply of plants in this variant. Gross consumption of moisture by plants of a winter wheat on black fallow predecessor averaged 419 mm that is 62 mm higher than on corn for silage predecessor. The total consumption of water per unit of crop (774 m3/t) for the black fallow predecessor was 15% lower than for the corn for silage predecessor (909 m3/t). The proportion of precipitation in the total water consumption of winter wheat ranged from 70 to 87%: of soil moisture from 30% to 13% respectively depending on the previous crop.
Keywords: precipitation, water demand, winter wheat, moisture supply, predecessor, yield, consumption of moisture
References
1. Kayumov M.K. Spravochnik po programmirovaniyu urozhaev. [Reference on crop programming]. Moscow, 1977. 188 p.
2. Gribkova N.G. Povyshenie urozhaynosti putem effektivnogo ispol'zovaniya osadkov. [Increase of productivity through effective use of rainfall]. Leningrad: Gidrometeoizdat, 1969. 94 p.
3. Gritsenko A.A. Agrometeorologicheskie usloviya v Zernogradskom rayone Rostovskoy oblasti (1930-2002 god). [Agrometeorological conditions in Zernogradskiy district of Rostov region (1930-2002 year)]. Rostov n/D: CJSC "Book", 2005. 80 p.
4. Dospekhov B.A. Metodika polevogo opyta (s osnovami statisticheskoy obrabotki rezul'tatov issledovaniy). [Methods of field experience (with the basics of statistical processing of research results)]. Moscow: publishing house Alliance, 2011. 6-e Izd., stereotype. 352 p.
5. Praktikum po agrokhimii pod red. Akademika RASKhN V.G. Mineeva. [Workshop on agricultural chemistry under the editorship of academician of the RAAS V. G. Mineev]. Moscow: publishing house of Moscow State University, 2001. 689 p.
6. Alpat'ev A.M. Vlagooborot kul'turnykh rasteniy. [The hydrologic cycle of cultivated plants]. Leningrad: Gidrometeoizdat, 1954. 248 p.
7. Bel'tyukov L.P. Rekomendatsii k planirovaniyu urozhaev sel'skokhozyaystvennykh kul'tur v yuzhnoy zone Rostovskoy oblasti. [Recommendation on planning of agricultural crops in the southern zone of the Rostov region]. p. Rassvet.: Rotaprint NGO "Don", 1990. 20 p.
8. Popov A.S., Yankovskiy N.G., Ovsyannikova G.V., Sukharev A.A., Kravchenko M.E. Osobennosti pogodnykh usloviy v yuzhnoy zone Rostovskoy oblasti. [Features of weather conditions in the southern zone of the Rostov region]. Zernovoe khozyaystvo Rossii, 2012. no. 3. pp. 56-59.
