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UCCE Tulare County, Best Management Practices for Nitrogen Fertilization of Grapes Page 4 of <br /> and canes sampled in dormancy. <br /> Fertilizer <br /> Total Nt % Fertilizer Nitrogen <br /> partitioning treatments applied ---Leaves--- Storage tissue <br /> Z <br /> (kg.ha-1) 7/18/84 9/2/84 5/7/85 dormant <br /> Check a3 [a <br /> 1 application(4/27) 46 F 8.48 ® 9.26® 4.17® 5.19 C <br /> 2 applications (4/27, 5/11) 40F 8.5 31®F 9.55]EIF 5.01 1 4.51 E=b8 applications 0b478 <br /> (weekly, 4/27 to 6/19) <br /> — t 15N-depleted ammonium sulfate applied 1984. <br /> 2 Values represent average for root, trunk, and cane samples. <br /> 3 Means within columns with like letters are not significantly different at the 5% level. <br /> Literature Cited <br /> 1. Alleweldt, G., H. During, and A. M. A. El-Sese. The influence of nitrogen fertilization and water supply on <br /> photosyntheses, transpiration and dry matter production in grapevines. Plant research and development 20:45-58 <br /> (1984). <br /> 2. Anton E. C., Barnickol, D. R. Schnaible.Nitrate in drinking water report to the legislature. Report#88-11 WQ. <br /> Division of Water Quality. State Water Resource Control Board. <br /> 3. Christensen, L. P. Seasonal changes and distribution of nutritional elements in Thompson Seedless grapevines. Am. <br /> J. Enol. Vitic. 20:176-190 (1969). <br /> 4. Christensen, L. P., A. N. Kasimatis, and F. L. Jensen. Grapevine nutrition and fertilization in the San Joaquin Valle) <br /> —40 pp. Calif. Div. Sci. Publication 4087 (1978). <br /> 5. Christensen, L. P., M. L. Bianchi, W. L. Peacock, and D. J. Hirschfelt. Influence of nitrogen fertilizer rates and <br /> .- timing on Thompson Seedless. In: Report of Research for Fresh Table Grapes, Calif. Table Grape Comm., Fresno, CA <br /> Vol. No. XIX 1991). <br /> — 6. Christensen, L. P.Nutrient level comparisons of leaf petioles and blades in twenty-six grape cultivars over three <br /> years(1979 through 1981). Am. J. Enol. Vitic. 35:124-133 (1984). <br /> — 7. Christensen, L. P., W. L. Peacock, and M. L. Bianchi. Potassium fertilization of"Thompson Seedless" grapevines <br /> using two fertilizer sources under drip irrigation. Am. J. Enol. Vitic. (In press, 1991). <br /> 8. Conradie, W. J. Seasonal uptake of nutrients by Chenin blanc in sand culture:I. Nitrogen. S. Afr. J. Enol. Vitic. 1:59 <br /> 65 (1980). <br /> — 9. Conradie, W. J. The uptake and distribution of N enriched nitrate by three rootstock cultivars grafted to Chenin <br /> blanc. S. Aft. J. Enol. Vitic. 4:45-417 (1983). <br /> �- 10. Conradie, W. J. Utilization of nitrogen by the grape-vine as affected by time of application and soil type. S. Aft. J. <br /> Enol. Vitic. 7:76-83 (1986). <br /> �" htto://cetulare.ucdavis.edu/pubRrave/n.496.htm 10/11/200 <br />