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001-es BibID:	BIBFORM037454
Első szerző:	Széles Adrienn (okleveles agrármérnök)
Cím:	Effect of nitrogen doses on the chlorophyll concentration, yield and protein content of different genotype maize hybrids in Hungary / Ványiné Széles Adrienn, Tóth Brigitta, Nagy János
Dátum:	2012
Megjegyzések:	The chlorophyll (Chl) concentration of maize was compared to its grain yield and protein content in six different N treatments (0,30,60,90,120,150 kg N ha-1) in a multifactorial field experiment with four replications and a split plot design in Eastern Hungary (47o33' N, 21o26' E, 111 m asl) in two years (2009 and 2010). Nitrogen fertilisation significantly (p<0.001) increased Chl content in both years. In the dry year (2009), the Chl content did not increase as a result of N fertilisation above 120 kg N ha-1, while the efficiency of higher N rates (150 kg N ha-1) could be shown in the wet year (2010), varying per hybrid. The weather-induced abiotic stress effects on yield and protein content could be reduced by N fertilisation, but this required high input costs. In 2009, both hybrids were treated with the highest N fertiliser dose (150 kg N ha-1) in order to reach the statistically highest yield (Mv 277 hybrid 6.76 t ha-1; Kenéz hybrid 9.86 t ha-1), and protein content (Mv 277 hybrid 10.2 g per 100 g dry matter; Kenéz hybrid 9.8 g per 100 g dry matter), while lower N fertiliser doses were enough in the favourable crop year of 2010.The correlation analysis results showed that weather parameters significantly influence the closeness of correlations, but they are always positive.We concluded that the on-site measurement of leaf chlorophyll (SPAD) serves as a good indicator of the N demand of maize, as the difference between N-deficient and adequate N treatments is thereby more easily made. Therefore, the Chl content of maize leaf can be used effectively in developing recommendations for soil N replenishment.
Tárgyszavak:	Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban maize fertilisation chlorophyll concentration protein content chlorophyll water use efficiency
Megjelenés:	African Journal of Agricultural Research. - 7 : 16 (2012), p. 2546-2552. -
További szerzők:	Tóth Brigitta (1984-) (környezetgazdálkodási agrármérnök) Nagy János (1951-) (agrármérnök, mérnök-tanár)
Pályázati támogatás:	TÁMOP-4.2.2/B-10/1-2010-0024 TÁMOP
Internet cím:	Intézményi repozitóriumban (DEA) tárolt változat DOI
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