ISHS Acta Horticulturae 293: IX International Symposium on Apricot Culture
EFFECT OF WATER REGIME ON APRICOT (CV. CAFONA) IN VESUVIAN AREA |
| Author: | C. Ruggiero |
| Abstract:
Are reported the final data of an irrigation research on apricot, carried out in the years 1980–1987 in the Vesuvian area. The trial regarded the effects of five water regimes: daily drip irrigation at 100, 66 and 33% E.T., sprinkler irrigation, every two weeks at 100% E.T., without irrigation. The E.T. was estimated by "A" pan evaporation with a 0.6 pan coefficient during the first two years, of 0.8 in the other years and a cover coefficient of 0.2, 0.3, 0.4, 0.45, 0.5, respectively from the first to the fifth year and of 0.6 in the later years. The begin of the coltivation was the 1980 transplanting peach, grafted in the summer with "Cafona". The parameters evaluated are been: water consumptive use, leaf water potential, stomatal resistance, trunk growth, root growth, and root distribution and in the last years the yield. Water consumptive use was evaluated by idrological balance, measuring soil moisture by neutron probe at different distance from the trunk. Leaf water potential was measurated by a type "B" psycrometer with the Knipling's method. The stomatal resistance was evaluated by a Licor - 85 - autoporometer. Root growth and root distribution was estimated measuring the root density by the Newman's method. From the results is possible to draw aut that the water regime has a remarkeable effect on all the parameters observated. The water volumes applied by irrigation modifieted the trend and the values of the water consumptive use, leaf water potential, stomatal resistance, root growth and root distribution and yield. Considering, particularly, the yield, the irrigation had a high influence modifing the efficiency of the water that the colture had by rainfall. The irrigation volume appared important and the lower volume applied had a very low influence on the yield. For the two irrigation methods compared, sprinkler and drip irrigation, the results are been the same, but with a higher water consumptive use by irrigation in the sprinkler irrigated plot. | |
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