000062021 001__ 62021
000062021 005__ 20210121114534.0
000062021 0247_ $$2doi$$a10.5424/sjar/2015131-6806
000062021 0248_ $$2sideral$$a100270
000062021 037__ $$aART-2015-100270
000062021 041__ $$aeng
000062021 100__ $$aIsla, R.
000062021 245__ $$aUtility of the end-of-season nitrate test for nitrogen sufficiency of irrigated maize under mediterranean semi-arid conditions
000062021 260__ $$c2015
000062021 5060_ $$aAccess copy available to the general public$$fUnrestricted
000062021 5203_ $$aCalibration of decision tools to improve N fertilizer management is critical to increase its adoption by maize (Zea mays L.) growers. The objective of this study was to establish nitrate and total nitrogen concentrations in the basal maize stalks (BMS) at harvest to separate maize fields among three N availability categories (N-deficient, N-optimum, and N-excess) under Mediterranean irrigated semiarid conditions. We analysed data from 26 irrigated maize trials conducted between 2001 and 2012. Trials included treatments receiving different N fertilizer rates and sources (mineral and organic), irrigation systems (flood, sprinkler) and soil types. The critical nitrate concentration in BMS to identify N-deficient plots (CNCL) is affected by the irrigation system. The CNCL was lower under sprinkler irrigation (708 mg NO3 - – N/kg) than under flood irrigation (2205 mg NO3 - – N/kg), and the later presented a higher degree of uncertainty compared to sprinkler irrigated systems. The results showed the difficulty to identify the N-deficient plots with the BMS test and the higher sensibility of nitrate-N than total-N concentration in BMS to separate N-deficient from N-optimal plots. Under sprinkler irrigation, nitrate in BMS>1500 mg NO3 - –N/kg had a 85% probability of having received an excess of N. Considering economic net returns to N fertilization, the range of nitrate concentration in BMS that maximized profit under sprinkler-irrigated conditions was established between 1100 and 1700 mg NO3 - –N/kg. Results suggest that BMS test can be useful in detecting plots with an excess of N but considering irrigation efficiency is crucial for stablishing successful CNC thresholds.
000062021 536__ $$9info:eu-repo/grantAgreement/ES/INIA/RTA04-114-C03-01$$9info:eu-repo/grantAgreement/ES/INIA/SC00-061-C02-1$$9info:eu-repo/grantAgreement/ES/MICINN/AGL2001-2214-C06-04$$9info:eu-repo/grantAgreement/ES/MICINN/AGL2005-08020-C05-01$$9info:eu-repo/grantAgreement/ES/MICINN/AGL2009-12897-C02-02
000062021 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000062021 590__ $$a0.76$$b2015
000062021 591__ $$aAGRICULTURE, MULTIDISCIPLINARY$$b24 / 57 = 0.421$$c2015$$dQ2$$eT2
000062021 592__ $$a0.385$$b2015
000062021 593__ $$aAgronomy and Crop Science$$c2015$$dQ2
000062021 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000062021 700__ $$aSalmerón, M.
000062021 700__ $$aCavero, J.
000062021 700__ $$aYagüe, M. -R
000062021 700__ $$aQuílez, D.
000062021 773__ $$g13, 1 (2015), e09-002 [9 pp]$$pSpan. j. agric. res.$$tSpanish Journal of Agricultural Research$$x1695-971X
000062021 8564_ $$s590295$$uhttps://zaguan.unizar.es/record/62021/files/texto_completo.pdf$$yVersión publicada
000062021 8564_ $$s120077$$uhttps://zaguan.unizar.es/record/62021/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000062021 909CO $$ooai:zaguan.unizar.es:62021$$particulos$$pdriver
000062021 951__ $$a2021-01-21-11:12:06
000062021 980__ $$aARTICLE