Summary
Kokovihin S.V. The performance of the parent form of a single-cross hybrid of maize Borisfen 433 MV depending on irrigation regimes, dozes of nitric fertilizer and plants density under conditions of Southern zone of the Ukrainian Steppe. – Manuscript.
Thesis to maintain the candidate scientific degree in Agriculture on specialty 06/01/09 – Plant Industry. The UAAN Institute of Grain Farming, Dniepropetrovsk, 2000.
In field experiences in Institute of agriculture of southern region UAAN (Southern zone of the Ukrainian Steppe) studied features of growth and development, morpho-physiological parameters of productive process, water regime and efficiency of plants of maize of the parent form of a single-cross hybrid Borisfen 433 MV on a hybridization site depending on irrigation regimes, dozes of nitrogen fertilizer and plants density. The influence investigated in experience agrotechnicals of receptions on biometrics parameters of plants, nutritious and water regime of ground, structure of a crop, grain efficiency of a mother line DK 437 М, productivity, output and quality seeds of maize is revealed. The economic-power rating of manufacture seeds of a single-cross hybrid Borisfen 433 MV is given. There is established, that the maximal seed efficiency of plants and largest economic benefit is reached at the irrigation regime 80-80-80 % WFC, the entering N120P90 and plants density 70 thousand per ha. At low water supply of irrigation systems, deficiency water and power resources it is expedient to apply water-preserved irrigation regime 60-80-60 % WFC, doze of fertilizers N120P90 and plants density 70 thousand per hа.
Keywords: seeds of maize, parent form of a single-cross hybrid of maize Borisfen 433 MV, irrigation regimes, dozes of nitrogen fertilizer, plants density.
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