Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4394572 | Journal of Arid Environments | 2006 | 16 Pages |
Abstract
The arid and semi-arid region occupies 89.3% of north-east Brazil, and livestock farming is one of the most important activities in this region. Experiments were conducted in four locations in the semi-arid of Pernambuco, Brazil. The objective was to study N (0, 75, 150, 225, and 300 kg N haâ1 yrâ1) and P fertilizations (0 and 33 kg P haâ1 yrâ1) at two populations (5000 and 40 000 plants haâ1) of Opuntia ficus-indica (L.) Mill. Increasing population from 5000 to 40 000 plants haâ1 increased productivity in all four sites. Phosphorus fertilization increased dry matter yield (DMY) only when soil P was <10 mg kgâ1. Nitrogen fertilization increased linearly DMY in the higher population, but no response to N was observed with 5000 plants haâ1. Nitrogen fertilization also increased plant N concentration and rainfall use efficiency. Cladode area index (CAI) increased with population but even in the higher population the CAI was 1 or less. In summary, increasing plant population and fertilizing with N and P resulted in greater productivity of O. ficus-indica in north-east Brazil. Phosphorus fertilization involved less economical risk to the farmer but positive responses occurred only when soil P was <10 mg kgâ1.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Earth-Surface Processes
Authors
J.C.B. Jr., M.V. Ferreira dos Santos, M. de Andrade Lira, D. Cordeiro dos Santos, I. Farias, L.E. Lima, R.L.C. Ferreira,