|Author:||El-Hady, O. A. ; El-Kader, A. A. A.|
|Book Group Author:||NA|
Two successive years (2000-2001) completely randomized field experiment with four replications on five years old Thompson seedless vines (Vitis spp.) was conducted in a drip irrigated newly reclaimed sandy area at El-Saff desert, Giza Governorate, Egypt. Field emission uniformity and absolute field emission uniformity were determined for the area under study to be 88.64% for Eu and 89.80% for Eua. The irrigation system at the studied area could be considered as good. Although the uniformity of irrigation at the area under study has exceeded 85%, great differences were estimated between the discharge of the drippers that adversely affected the uniformity of growth, nutrients uptake, yield and both water and fertilizers use efficiency by the vines. With this respect, differences among the annual amounts of irrigation water received by the vines and consequently fertilizers dissolved in it have reached 31.6%. Accordingly, significant variations were calculated to be 32.4, 51.6 and 60.2% for leaf area, dry weight of the leaves and obtained yield, respectively. Content of nutrients in the leaves of vines that received the maximum amounts of irrigation water were higher than those of vines that received the minimum amounts by 33.3, 63.3, 45.5, 32.1, 18.2 and 48.6% for N, P, K, Fe, Zn and Mn, respectively. Consequently, relative uptake of these nutrients took the same trend. Positive differences in this parameter were 102.0, 143.5, 120.1, 99.8, 78.7 and 124.4 for the aforementioned nutrients, respectively. Values of water and fertilizers use efficiency by the vines were also greatly affected by the uniformity of irrigation. Differences among them have reached 21.6%. Improving the uniformity of emission of the trickle irrigation system to be more than 90% will lead to uniform fertigation and at the same time will raise either the uptake of nutrients or the efficiency of using water and fertilizers by the vines.
|Pages:||577 - 588|
|Journal:||Egyptian Journal of Soil Science|
ammonium sulfate, crop yield, emission, farmyard manure,grapes, growth, iron, irrigation systems, irrigation water, leaf area,leaves, manganese, nitrogen, nutrient uptake, phosphoric acid,phosphorus, potassium, potassium sulfate, reclaimed land, sandy soils,soil types, sulfur fertilizers, superphosphate, trickle irrigation, useefficiency, water use efficiency, zinc, Egypt, Vitis, Vitis vinifera,Vitidaceae, Rhamnales, dicotyledons, angiosperms, Spermatophyta, plants,eukaryotes, Vitis, North Africa, Africa, Mediterranean Region, MiddleEast, Developing Countries, ammonium sulphate, FYM, Mn, potassiumsulphate, sulphur fertilizers, Vitaceae, Horticultural Crops (FF003)(New March 2000), Plant Physiology and Biochemistry (FF060), PlantNutrition (FF061), Plant Water Relations (FF062), Plant Production(FF100), Fertilizers and other Amendments (JJ700), Soil Water Management(Irrigation and Drainage) (JJ800) (Revised June 2002) [formerly SoilWater Management], Animal Wastes (XX100)