2024-03-29T09:15:53Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/355922018-09-12T09:39:31Zcom_10261_15com_10261_6col_10261_268
Nitrate and potassium concentrations in cotton petiole extracts as influenced by nitrogen fertilization sampling date and cultivar
López Valero, Manuela
Castro Pérez, Asunción de
Gutiérrez, J.C.
Leidi, Eduardo O.
Junta de Andalucía
Gossypium hirsutum
Mineral nutrition
Yield
8 páginas, 4 figuras, 4 tablas.
The effect of nitrogen fertilization levels on seed cotton yield responses of cultivars from Andalusia was studied
during two consecutive years. To obtain preliminary information for improving nutrient management, the analysis
of nitrate and potassium (K) was performed in petiole extracts at critical times (flowering, boll-setting, boll growth)
during the growth cycle. Signif icant differences among cotton cultivars were found for petiole nitrate and K
concentrations. The highest petiole nitrate and K concentrations were found in cultivar ‘Crema 111’ with 4,140 and
14,180 mg kg–1 respectively. These concentrations were affected by N treatment and sampling date. The relationships
among petiole nutrient concentrations and seed cotton yield depended on sampling date, cultivar and year. The
highest association between petiole nitrate and yield was found early in the season in 2003 (r = 0.918 and r = 0.965
for ‘Crema 111’ and ‘Sor Angela’ respectively). The analysis of petiole extracts for controlling plant nutritional
status and optimize seed cotton yield requires a systematic assessment as critical values in nutrient concentration
for seed cotton yield may differ depending on cultivar, soil type, sampling date and crop management. The technique
of petiole analysis used in this paper might be useful for detecting genotypes with improved nutrient uptake or use
efficiency.
2011-05-12T13:28:16Z
2011-05-12T13:28:16Z
2010
artículo
Spanish Journal of Agricultural Research 8(1): 202-209 (2010)
1695-971-X
http://hdl.handle.net/10261/35592
http://dx.doi.org/10.13039/501100011011
eng
www.inia.es/sjar
openAccess
Instituto Nacional de Investigaciones Agrarias (España)