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Type of publication: Straipsnis Clarivate Analytics Web of Science ar/ir Scopus / Article in Clarivate Analytics Web of Science or / and Scopus (S1)
Field of Science: Agronomija / Agronomy (A001)
Author(s): Velička, Rimantas;Marcinkevičienė, Aušra;Raudonius, Steponas;Rimkevičienė, Marija
Title: Integrated evaluation of rape readiness for overwintering
Is part of: Acta Agriculturae Scandinavica. Section B, Soil and plant science. OSLO : Taylor & Francis, Vol. 56, N 2(2006)
Extent: p. 110-116
Date: 2006
Keywords: Brassica napus;Chemical composition;Crop density;Integrated evaluation method;Leaves;Terminal bud
Abstract: Rape (Brassica napus L.) overwintering has been studied in Lithuania and elsewhere; however, data have been analysed separately without inetgration into a common evaluation system. In this work the chosen integrated evaluation method enabled us to make complex evaluation of rape readiness for overwintering in crops of different density. A comprehensive evaluation of rape readiness for overwintering in crops of different density was performed using experimental data of the years 2000–2002. The variances of the individual indicators were subdivided into scales of nine points, and means were assigned to these points. The resulting evaluation points (EP) were marked in a network diagram with the radius scaled from 1 to 9. Evaluation threshold (ET = 5 evaluation points) was also marked, indicating the border between positive and negative assessment. This method thus allows at one sight a distinct, reproducible illustration and evaluation of different indicators characterizing readiness for overwintering. Additionally, interactions between indicators and areas demarcated by the evaluation points of all indications are visualized in the network diagram. An integrated evaluation index (IEI), consisting of the average of evaluation points, its standard deviation and standard deviation of the average of the evaluation points below the ET, was calculated to make generalized data assessments. Comprehensive evaluation using 21 indicators of rape readiness for overwintering in crops of different density showed that importance of these indicators varied. Better plant readiness for overwintering in a crop of the lowest density was determined by high values of assessment of terminal bud height, root collar diameter and nutrient accumulation in the terminal bud compared with a more dense crop. The suitability of the integrated evaluation method in such cases highlights the establishment of very strong and significant correlation (r = 0.98, p≤0.01) between the
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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