ISHS Acta Horticulturae 792: V International Symposium on Irrigation of Horticultural Crops
EFFECT OF SOIL WATER CONTENT AND BERRY PHENOLOGICAL STAGES ON TRUNK DIAMETER VARIATIONS IN TABLE GRAPES |
| Authors: | G. Selles, R. Ferreyra, R. Ahumada, I. Muņoz, H. Silva |
| Keywords: | dendrometers, fruit growth, vine irrigation, table grapes |
| Abstract:
In the Aconcagua Valley, Chile (32° 47' S, 70° 42' O), during three consecutive periods, a trial on table grapes cv. Crimson Seedless was carried out. The objective was to evaluate the effect of soil water content and berry phenological stages on trunk diameter variations (TDV), and to determine its possible use in irrigation scheduling. Four treatments were applied: T1, irrigation at 100% crop evapotranspiration (Etc); T2, 75% Etc; T3, 50% Etc and T4, with a variable irrigation regime between 0 and 100% Etc. Berry phenological stage affected maximum daily trunk growth (MDG) as well as maximum daily trunk shrinkage (MDS). MDG was higher in T1 and depended on soil water content during the phenological stage of berry set to the beginning of veraison, when berry size reached 85% of its final size. Then MDG can be used as a tool for irrigation scheduling. MDS showed a more complex response according to soil water availability, it increased with moderate deficits as well as with soil water excess. Therefore, MDS is not an appropriated indicator for irrigation scheduling in table grapes cv. Crimson Seedless. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
