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Using the classical and functional methods of growth analysis, the effect of mineral N fertiliser (0, 80, 160 and 240 kg ha −1 ) on the dynamics of growth and growth parameters was studied in 2001 and 2002 in a two-factorial, long-term experiment set up in a split-plot design on three maize hybrids with different genotypes, Mv 272 (FAO 280), Mv 355 (FAO 390) and Maraton (FAO 450). The following growth parameters were calculated to characterise the effect of N fertiliser: the absolute growth rate (AGR, ALGR), the relative growth rate (RGR), the leaf area index (LAI), the net assimilation rate (NAR) and the harvest index (HI).Similar tendencies were found for the yield response of maize and the values of the growth parameters as a function of N fertilisation. Based on the results of principal component analysis, multiple regression analysis and discriminant analysis, the parameters AGR, LAI max , ALGR and HI were found to have a decisive influence on the grain yield of maize. It could be concluded from the results that growth parameters can be used to predict the N fertiliser responses of maize in early growth stages.

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The interactions of ecological conditions, genotypes and agrotechnical elements determine the yield quantity, quality and stability in cereal (wheat, maize) production. The applied input- level can modify the adaptive capacity of crop models to ecological conditions. The effects of agrotechnical elements (crop rotation, fertilization, irrigation, crop protection, plant density) were studied in the long-term experiment on chernozem soil. Our scientific results proved that the high yields and good yield-stability were obtained in the input-intensive crop models, so these models had better adaptive capacity, high yield and resilience. Maize had lower ecological adaptive ability than winter wheat. The optimalization of agrotechnical elements reduces the harmful climatic effects so we can increase the yield and yield stability of cereals agro-ecosystems. The yields of wheat varied between 2 and 7 t ha−1 in extensive and 8 and 10 t ha-1 in intensive crop models and the yields of maize ranged between 2 and 11 t ha−1 and 10 and 15 t ha−1, respectively.

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Fertilizer Application on the Baking Quality of Winter Wheat Varieties in a Long Term Experiment under Continental Climatic Conditions in Hungary — Cereal Research Communications, Vol. 33 No. 4 pp. 825 Győri Z

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The effect of four rates of nitrogen (N) fertilisation (0, 80, 160, 240 kg ha−1) on the growth and yield components of three winter wheat varieties with different maturity dates (Mv Toborzó — extra early, Mv Palotás — early, Mv Verbunkos — mid-early) was analysed in a long-term experiment laid out in a two-factorial split-plot design with four replications in the years 2007–2009. The dry matter production of the whole plant and of individual plant organs, the maximum leaf area, the area of the flag-leaf and all the yield components except the thousand-kernel weight were significantly the greatest in the N160 or the N240 treatments. Averaged over the varieties and years the grain yield in the N treatments was N0: 5.5, N80: 7.1, N160: 7.3 and N240: 7.5 t ha−1. Averaged over N treatments and years the variety Mv Verbunkos had the highest dry matter production, stem mass, spike mass, number of grains per spike and grain yield. Mv Verbunkos had the greatest leaf area in the favourable years of 2008 and 2009 and the greatest flag-leaf area in 2008. Averaged over N treatments and varieties the dry matter production per plant, the leaf and stem mass, the number of spikes per square metre and the thousand-kernel weight were greatest in 2007. The spike mass was lowest in 2007 and had higher, very similar values in 2008 and 2009. The maximum leaf area per plant, the area of the flag-leaf, the number of grains per spike and the grain yield were highest in 2008. The values and dynamics of the growth parameters gave a good characterisation of the effect of the treatments (N fertilisation, variety, year) on plant production (yield, yield components) in various stages of growth.

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., Márton, L., Németh, T., Szemes, I. (2007): Effect of liming and mineral fertilization on the soil and plants in a 44-year long-term experiment in Nyírlugos. Agrokémia és Talajtan , 56 , 255–270. Szemes I

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of Winter Wheat Varieties in a Long Term Experiment under Continental Climatic Condiditions in Hungary — Cereal Research communications, Vol. 33. no. 4. pp 825. Győri Z. Effects of

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kultúrákban XXVII. Kiadvány 44–83.p. Lazányi, J, and Loch, J. (2006): Evaluation of 0.01 MCaCl 2 Extractable Nitrogen Forms in a Long-term Experiment Agrokémia és Talajtan Vol. 55. No 1 146–154 p

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Cereal Research Communications
Authors: Blazenka Bertic, Zdenko Loncaric, Vladimir Vukadinovic, Zelimir Vukobratovic, and Vesna Vukadinovic

. Effects of fertilizer application on the baking quality of winter wheat varieties in a long term experiment under continental climatic conditions in Hungary. Cereal Research Communications Vol. 33, no. 4: 825–832 pp

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response on the grain yield and yield stability of maize (Zea mais L.) hybrids in long-term experiments. Növénytermelés. 54.1–2. 35–53 pp Lap D. Q. Műtrágyázás x növényszám

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Pepó P. — Sipos P. — Gyóri Z.: 2005. Effects of Fertilizer Application on the Baking Quality of Winter Wheat Varieties in a Long Term Experiment under Continental Climatic Conditions in Hungary. Cereal Research Communications 33,4: 825

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