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NEW TRENDS FOR CROP EVAPOTRANSPIRATION AND IRRIGATION WATER REQUIREMENTS IN SOME HORTICULTURAL CROPS DURING THE FIRST DECADE OF THE 21ST CENTURY IN SOUTHERN ROMANIA

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Author(s): Cristian Paltineanu | Emil Chitu | Emilia Mateescu

Journal: Scientific Papers of the Research Institute for Fruit Growing Pitesti, Romania
ISSN 1584-2231

Volume: XXVII;
Start page: 92;
Date: 2011;
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Keywords: arid conditions | drought | global warming

ABSTRACT
This paper deals with the trend for Penman-Monteith reference evapotranspiration (ETo), crop evapotranspiration (ETc) and irrigation water requirements (IWRs) of some horticultural species during the first decade of the 21st century in Southern Romania. The species studied here were: strawberry, tomato and table grapes. These indices were calculated for three weather stations in various relief regions of southern Romania: Pitesti, Bucharest-Baneasa and Constanta. Monthly distribution of ETo for the three locations studied showed that for the first half of the year, the monthly values were higher for the first decade of the 21st century versus the means of the 20th century. In the first decade of century XXI versus century XX, ETc specifically increased in May, June and July, while in August the increase was negligible, and in September ETc decreased. Remarkable high ETc values were especially met for tomato. IWRs have not shown a clear pattern with regard to the trend in the first decade of the XX century versus century XX. IWRs increased in May versus century XX. The following months: July and August had practically the same IWRs values, whereas September was the month where irrigation application decreased by about 60-80% versus last century. Because this study only refers to one decade from a new century, and this decade showed high dynamics in global warming versus century XX, these changes could also have either a cyclic or a long term character, and this finding should be confirmed by further studies.
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