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RESEARCH REGARDING THE BEHAVIOR OF SOME OIL RAPE HYBRIDS IN THE BANAT-S PLAIN
Abstract
Research aimed at testing new PIONEER oil rape hybrids cultivated on three different fertilisation rates in the soil and climate conditions of the BanatпїЅs Plain, near Jebel, Timis County, Romania. The soil is a typical cambic chernozem, moist phreatic, pH 6.21, and 2.07% humus in the Ap horizon. The climate in the area is moderate continental with little Mediterranean and ocean influences favourable to oil rape cultivation. The trials organised between 2014 and 2016 were bifactorial, with Factor A represented by the agricultural and technical fertilisation procedures of a trial plot (a1 - N0P100K100; a2 - N100P100K100 and a3 - N200P100K100) and Factor B represented by the studied hybrids PX100CL, PT200CL, and PR45D05. Yield results show the strong impact of nitrogen fertilisation applied on a fund of P100K100: the mean increase in yield in the four hybrids was 41% in the variant fertilised with N100 and 60% in the variant fertilised with N200. The differences in yield of 938 kg/ha (N100) and 1363 kg/ha (N200) are statistically ensured as very significant. Oil content decreased with the increase of the nitrogen rate, but oil yield increased due to the increase of the seed yield. Thus, on average per trial cycle, oil content decreased from 47.3% in the variant N0 to 45.6% in the variant N200. However, oil yield increased, on average per cycle and per studied hybrids from 1,073 kg/ha in the variant N0 to 1,656 kg/ha in the variant fertilised with N200. The best yields were in the semi-early hybrid PR45D05 (3,950 kg/ha in the variant N200P100K100), while the lowest yields was in the same variant (3,311 kg/ha) in the hybrid PX100CL. Oil yield on average on the three agri-funds and in the three trial years varied between 1,302 kg/ha in the hybrid PX100CL and 1,474 kg/ha in the hybrid PT200CL. Research results point out the possibility of extending the cultivation of the experimental hybrids.
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