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001-es BibID:BIBFORM057914
Első szerző:Vágó Imre (vegyészmérnök)
Cím:Plant growth and potassium supply dynamics on a chernozem soil of a long-term fertilization and irrigation experiment with maize monoculture in Hungary / Vágó Imre, Sipos Marianna, Tolner László, Czinkota Imre, Szilágyi Gergely, Ibrahim Issa, Kátai János
Megjegyzések:For the plant production used soil's nutrient supplying ability ideally should correspond to the needsof the plants. The aim of our experiment work is to study as precisely as possible, how the dynamics ofgrowth and nutrient uptake of the maize plant develop during the vegetation period. For theirdetermination the basis of our research work was a long-term irrigation and fertilization monoculturemaize field experiment that has been set up in 1984 near to Debrecen, Hungary. The soil of thisexperiment is a medium-heavy, loam texture calcareous chernozem type based on loess. The deepnessof humus soil layer is between 70 and 90 cm. Its upper layer has become leached due to the intensiveproduction in the past decades, so it doesn't content any significant lime-amount. Therefore, the soil pHis slightly acidic in the production layer, which is favorable for nutrient-mobilization and -uptake. Thisfield represents the production circumstances of the chernozem soils of Hungary with excellentproductivity. Effects of three factors were studied: genotypes of maize (3), fertilizer dosages (6) andirrigation levels (2). The total number of investigated treatments (plots) was 36. Plant samples werecollected 7 or 6 times during the vegetation period, and the above-ground dry matter and the nutrientuptake of plants were determined. For characterizing and describing of the plant growth and nutrientuptake dynamics was used the so-called "S-type" (acceleration ? saturation) equation as follows:y=A/(1+exp(-k*(x-x0)))*(1-b*x), where "y" is the actual value of the measured (dependent) factor on theday "x" after plant shooting, "A" is the maximum value of "y", "x0" is the day of maximum growth rate of"y" (point of inflexion) and "b" is the rate of decreasing of dependent value for one unit. According toour results and calculations it can be concluded, that beside the previously used soil and plant nutrientcontentthe consideration and calculation of the plant-extracted nutrient-amount ? depending on theapplied hybrid and other agro-technological measurements ? is suggested in order to characterizeprecisely the nutrient-supply of maize. This parameter informs us not only about the available nutrientamountat the sampling time, but about the supply level of the plants until the sampling time as well.We suggest for sampling times the intensive vegetative growth period, the switch between the vegetativeand generative growth phases (silking), just as the grain-filling phase.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban
biomass and potassium uptake dynamics
Megjelenés:Soil-Water Journal. - Special Issue : 1 (2015), p. 6-12. -
További szerzők:Sipos Marianna (1984-) (környezetgazdálkodási agrármérnök) Tolner László (agrár) Czinkota Imre (agrár) Szilágyi Gergely (1987-) (növénytermesztő) Issa, Ibrahim Kátai János (1950-) (biológus, hidrobiológus)
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