IRRIGATION INFLUENCE (1976-2009) ON THE LEVEL STABILITY AND QUALITY OF THE WHEAT AND ON THE WATER USE EFFICIENCY IN THE CRIŞURILOR PLAIN CONDITIONS PUBLISHED

Cornel Domuţa, Maria Şandor, Gheorghe Ciobanu, Nicu Cornel Sabău, Ioana Borza, Cristian Domuţa, Radu Brejea, Manuel Gîtea, Adrian Vuşcan, Ana Moza, Anuţa Jurca
The researches were carried out in the research field for establishing the soil water balance from Agricultural and Development Research Station Oradea during 1976-2009. The preluvosoil from the research field is characterized by the presence of the horizons Bt 1 (34-54 cm depth) and Bt 2 (54-78 cm depth); the colloid clay eluviation determined to appear the El horizon with 31.6% colloid clay. On 0-20 cm depth, the soil has a big percentage of macroagregates (Φ > 0.25 mm), 47.5% bulk density is of 1.41 g/cm 3 and total porosity is median one, hydraulic conductivity is of 21.0 mm/h. The values of the pH indicates a low acid soil, humus, total nitrogen, phosphorus and potassium content are low.  The source of irrigation water was a drill of 15 m depth. The chemical parameters of the irrigation water were the following: fixed mineral residue 0.5 g/l; SAR index 0.52; CSR index= -1.7%; N. Florea class = II; there are not some problemes regarding the use of irrigation use.Two variant were studied: unirrigated; irrigated. The soil water reserve from irrigated variant was maintained between easily available water content and field capacity on 0-50 cm depth. The stability of the yields was analized by standard deviation and panification indexes was determined by usually method; the water use efficiency was calculated as a report between yield and water consumption; the water consumption was establishing directly by soil water balance method. In average on the studied period, the irrigation determined an yield gain of 38.5% very significant statistically. The panification index had smaller values in irrigated variant; water use efficiency improved with 2.0% but in 4 years water use efficiency from irrigated was smaller than the value registered in the unirrrigated variant. The research results emphasized the irrigation opportunity to obtain the high and stability wheat yield in the Crişurilor Plain.The research results are part in the project: PN–II–ID–PCE–2008 2; 690/2009 ” The study of influences of some technological elements upon the wheat  yield quality in the conditions of the North-Western part of Romania”.
pedological drought; irrigation; water consumption; yield; panification index; wheat
Presentation: oral

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