ISHS Acta Horticulturae 379: International Symposium on Quality of Fruit and Vegetables: Influence of Pre- and Post- Harvest Factors and Technology
THE EFFECTS OF N, P, K FERTILIZERS ON FRUIT YIELD AND QUALITY OF SATSUMA MANDARINES (CITRUS UNSHIU MARC.) |
| Authors: | A.T. Köseoglu, N. Eryüce, H. Çolakoglu |
| Keywords: | Citrus fertilization, Fruit quality, Fruit weight, Fruit length, TSS, Rind thickness, Leaf N-P-K content |
| Abstract:
Satsuma Mandarines grafted onto trifoliate (Poncirus trifoliata Raf.) rootstocks were fertilized uniformly at first for 7 years. For the succeeding 4 years N, P, K fertilizers were applied at 5 levels each and added in increasing amounts in three separate experiments. Except for the tested fertilizer, the other were held constant and yield and fruit quality characteristics were evaluated. The highest amounts of fruit yielded from 420 g N tree-1, 323 g P2O5 tree-1, 355 g K2O tree-1. Nitrogen and K also affected fruit weight, fruit size, and rind thickness. Potassium increased total soluble solids, inversely N decreased it. Quadratic relationships between N and K contents of leaves and yield and fruit weight were determined. There were positive correlations between N, K contents of leaves and rind thickness but negative with P content. Leaf N content were negatively correlated with soluble solids of fruit juice in contrast to leaf K contents which were positively correlated. | |
Download Adobe Acrobat Reader (free software to read PDF files) | |
