| Full text | |
| Author(s): |
Mateus, G. P.
[1]
;
Crusciol, C. A. C.
[2]
;
Pariz, C. M.
[3]
;
Borghi, E.
[4, 5]
;
Costa, C.
[3]
;
Martello, J. M.
[2]
;
Franzluebbers, A. J.
[6]
;
Castilhos, A. M.
[3]
Total Authors: 8
|
| Affiliation: | [1] Sao Paulo Agcy Agribusiness Technol APTA, Andradina, SP - Brazil
[2] UNESP, Coll Agr Sci, Dept Crop Sci, Botucatu, SP - Brazil
[3] UNESP, Sch Vet Med & Anim Sci, Dept Anim Nutr & Breeding, Botucatu, SP - Brazil
[4] UNESP, Coll Agr Sci, Botucatu, SP - Brazil
[5] Brazilian Agr Res Corp EM BRA PA, Corn & Sorghum Res Ctr, Sete Lagoas, MG - Brazil
[6] N Carolina State Univ, USDA ARS, 3218 Williams Hall, Campus Box 7619, Raleigh, NC 27695 - USA
Total Affiliations: 6
|
| Document type: | Journal article |
| Source: | AGRONOMY JOURNAL; v. 108, n. 1, p. 433-447, JAN-FEB 2016. |
| Web of Science Citations: | 13 |
| Abstract | |
Intercropping sorghum {[}Sorghum bicolor (L.) Moench] with tropical perennial grasses and using the appropriate rate of sidedress N application can maximize grain yield (GY) and revenue and can improve land-use efficiency (LUE). The effects of monocropped sorghum (MS) or sorghum intercropped with palisadegrass (Urochloa brizantha cv. Marandu; SPG) or guineagrass (Panicum maximum cv. Mombasa; SGG) and sidedress N application rates of 0, 50, 100, and 200 kg ha(-1) on leaf nutrient concentration, sorghum GY, revenue, and LUE were investigated during three growing seasons at Botucatu, SP, Brazil, on a clay, kaolinitic, thermic Typic Haplorthox. The SGG treatment had lower leaf N, P, and K concentrations and lower 1000-grain weight, shoot dry matter, and GY than MS and SPG at all sidedress N rates; MS and SPG at 200 kg ha-1 of sidedress N resulted in greater sorghum GYs (3.80 and 3.81 Mg ha-1, respectively). The forage dry matter production (FDMP) and crude protein of tropical perennial grasses were higher as a function of the sidedress N rate. The SGG treatment resulted in negative net profits for all sidedress N rates. The MS and SPG treatments (independent of sidedress N rates) resulted in similar net profits (approximately US\$85 and 560 ha(-1), respectively). The SPG treatment using 200 kg ha-1 of sidedress N resulted in a higher land equivalent ratio and relative N yield (1.27 and 123%, respectively) than SGG (0.96 and 107%, respectively). The SPG treatment with 200 kg ha(-1) of sidedress N is the best option for increasing sorghum GY, revenue, and FDMP from autumn to part of the spring and for improving LUE. (AU) | |
| FAPESP's process: | 03/09914-3 - Direct sowing system of agricultural production |
| Grantee: | Ciro Antonio Rosolem |
| Support Opportunities: | PRONEX Research - Thematic Grants |