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The effect of water supply during grain growth on the utilization of soil mineral nitrogen by winter wheat

Result description

The effect of water supply on the utilization of soil mineral nitrogen (Nmin) from top- and subsoil by winter wheat was studied on loamy clay soil in Praha-Ruzyně in the years 2004-2006. The water regime was differentiated from heading by covering plotswith movable shelter during rain and with drip irrigation. Wheat was grown with no N and 200 kg N.ha-1 (N0 and N1, resp.). Water shortage during the period of grain formation reduced the utilization of Nmin supply in 0-90 cm in respective years by 64 kg,20 kg and 69 kg N.ha-1 in N1 treatment, in comparison with rain-fed control, and by 91 kg, 25 kg and 98 kg N.ha-1 in comparison with irrigated treatment. In N0 treatment the reduction reached 18 kg N.ha-1 in 2004, and was under 5 kg N.ha-1 in 2005 and 2006. The reduced apparent utilization of Nmin supply under water shortage corresponded with decrease of N yield of shoots (correlation coefficient > 0.93 and 0.97 in N0 and N1, resp.), however, the slope of regression differed among exper

Keywords

water regimeavailable nitrogensoil profiledepletionuptakeresidual Nroot systemwheat

The result's identifiers

Alternative languages

  • Result language

    angličtina

  • Original language name

    The effect of water supply during grain growth on the utilization of soil mineral nitrogen by winter wheat

  • Original language description

    The effect of water supply on the utilization of soil mineral nitrogen (Nmin) from top- and subsoil by winter wheat was studied on loamy clay soil in Praha-Ruzyně in the years 2004-2006. The water regime was differentiated from heading by covering plotswith movable shelter during rain and with drip irrigation. Wheat was grown with no N and 200 kg N.ha-1 (N0 and N1, resp.). Water shortage during the period of grain formation reduced the utilization of Nmin supply in 0-90 cm in respective years by 64 kg,20 kg and 69 kg N.ha-1 in N1 treatment, in comparison with rain-fed control, and by 91 kg, 25 kg and 98 kg N.ha-1 in comparison with irrigated treatment. In N0 treatment the reduction reached 18 kg N.ha-1 in 2004, and was under 5 kg N.ha-1 in 2005 and 2006. The reduced apparent utilization of Nmin supply under water shortage corresponded with decrease of N yield of shoots (correlation coefficient > 0.93 and 0.97 in N0 and N1, resp.), however, the slope of regression differed among exper

  • Czech name

    Vliv zásobení vodou v průběhu růstu zrna na využití půdního minerálního dusíku ozimou pšenicí

  • Czech description

    V polním pokusu s ozimou pšenicí byl v letech 2004-2006 sledován vliv odlišného vodního režimu na využití minerální dusíku z vrstev půdního profilu do hloubky 90 cm. Dostupnost vody byla diferencována v období růstu zrna zakrýváním porostu při dešti a kapkovou závlahou. Pokus měl dvě úrovně zásobení dusíkem, bez hnojení (N0) a 200 kg N.ha-1 (N1) aplikovaných na podzim (100 kg N.ha-1) a na jaře (40 kg a 60 kg N.ha-1). Odběr dusíku z různých vrstev půdy byl určen bilančně, na základě postupných odběrů vzorků půdy. Současně byl zjišťován odběr N nadzemními orgány rostlin pšenice, aby bylo možné odlišit vliv odběru N porostem a vliv dynamiky N v půdě v období zrání na pozorovaný obsah Nmin v půdním profilu. Vliv vodního režimu na obsah residuálního Nmin (po dosažení zralosti) v podorniční vrstvě 50-90 cm u nehnojené varianty (Obr.1) byl na hranici průkaznosti (P=0.011); ve vrstvě 0-50 cm a 0-90 cm byl vliv neprůkazný (P=0.65 a 0.054). Obdobně byl vliv ročníku a interakce ročníku a vrstvy p

Classification

  • Type

    Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    GD - Fertilization, irrigation, soil treatment

  • OECD FORD branch

Result continuities

Others

  • Publication year

    2007

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Scientia Agriculturae Bohemica

  • ISSN

    1211-3174

  • e-ISSN

  • Volume of the periodical

    38

  • Issue of the periodical within the volume

    3

  • Country of publishing house

    CZ - CZECH REPUBLIC

  • Number of pages

    6

  • Pages from-to

    105-110

  • UT code for WoS article

  • EID of the result in the Scopus database

Result type

Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

Jx

CEP

GD - Fertilization, irrigation, soil treatment

Year of implementation

2007