| authors: | Zhang, M. ; Alva, A. ; Li, Y. ; Calvert, D. |
| title: | Root Distribution of Grapefruit Trees under Dry Granular Broadcast vs. Fertigation Method |
| year: | 1996 |
| source: | Proc. Kluwer Academic Publishers: Plant & Soil 183:79-84, |
| URL: | Please log in to access the document. |
| abstract: | The aim of this study was to determine the effects of nitrogen (N) fertilization methods on root distribution and mineral element concentration of White Marsh grapefruit (Citrus paradisi MacFadyen) trees on sour orange (C.aurantium Lush) rootstock on a poorly drained soil. At 0-15 cm depth of soil, root density was significantly greater for trees receiving 112 kg N ha?1 yr?1 as dry granular broadcast than those receiving the same amount of N as fertigation. Of the total roots in the top 60 cm soil,>75% was at 0-15 cm and <10% was at 30-60 cm. Root density was greatest near the emitter. Nitrogen concentration of roots was greatest for the trees, which received fertigation as compared to the trees, which received dry fertilizer broadcast or no N. |
| keywords: | Dry granular fertilizer, fertigation, irrigation, root density, poorly drained soil, root mineral nutrition. |
