Predicting nitrogen fertilizer needs for sugarcane and reactions of dissolved orga...
| Full text | |
| Author(s): |
Mariano, Eduardo
[1]
;
Leite, Jose M.
[1]
;
Megda, Michele X. V.
[2]
;
Torres-Dorante, Luis
[3]
;
Trivelin, Paulo C. O.
[2]
Total Authors: 5
|
| Affiliation: | [1] Univ Sao Paulo, Dept Soil Sci, Luiz de Queiroz Coll Agr, BR-13418900 Piracicaba, SP - Brazil
[2] Univ Sao Paulo, Lab Stable Isotopes, Ctr Nucl Energy Agr, BR-13400970 Piracicaba, SP - Brazil
[3] Yara Int ASA, Res Ctr Hanninghof, D-48249 Dulmen - Germany
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | AGRONOMY JOURNAL; v. 107, n. 2, p. 641-650, MAR-APR 2015. |
| Web of Science Citations: | 14 |
| Abstract | |
Current limitations on the use of conventional N fertilizers on sugarcane (Saccharum spp.) in Brazil require the search for alternative sources with adequate N use efficiency. Field experiments were conducted in Typic Hapludox (TH) and Typic Eutrustox (TE) soils in Sao Paulo State, Brazil, to evaluate the dynamics of soil mineral N, N uptake, and sugarcane yield in response to N amendments including Ajifer-8, ammonium chloride, ammonium nitrate, calcium ammonium nitrate (CAN), and urea applied on sugarcane ratoon at 100 kg N ha(-1). The experiments were arranged in randomized complete block design, with four replications. The treatments were applied at 105 and 122 days a after harvest of plant cane (DAH) in the TH and TE soil. Ajifer-8 exhibited higher NH4+-N availability in the 0- to 20-cm soil layer 139 DAH in the TH soil. Ammonium nitrate and CAN resulted in the highest NO3--N values in the soil within the same period. In the TE soil, the soil mineral N content remained unaltered during all of the sampling dates. The high values of accumulated N uptake by sugarcane in both soils indicates that a good portion of the soil mineral N was take up by the plants. The Ajifer-8 and CAN fertilizers resulted in higher sugarcane yield in both experiments, and may be used as replacement for conventional N sources. In contrast, the use of ammonium chloride resulted in low values of soil mineral N and accumulated N uptake. (AU) | |
| FAPESP's process: | 09/10192-9 - Agronomic efficiency of nitrogen sources applied in sugarcane ratoon harvested mechanically |
| Grantee: | Michele Xavier Vieira Megda |
| Support type: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 09/12537-3 - Fitomass and nutrients accumulation in sugar cane ratoon related to nitrogen sources in unburned harvesting system |
| Grantee: | José Marcos Leite |
| Support type: | Scholarships in Brazil - Master |
| FAPESP's process: | 09/04691-2 - Nitrogen mineralization and availability in soils cropped with sugarcane |
| Grantee: | Eduardo Mariano |
| Support type: | Scholarships in Brazil - Master |