The effect of nitrogen nutrition on the productivity of winter triticale in the soils of Central Lithuania | Slāpekļa mēslojuma ietekme uz ziemas tritikāles ražību Lietuvas vidienes augsnēs
2008
Janusauskaite, D., Lithuanian Inst. of Agriculture, Akademija, Kedainiai reg. (Lithuania) | Lazauskas, S., Lithuanian Inst. of Agriculture, Akademija, Kedainiai reg. (Lithuania)
anglais. During the period 2000–2004 field trials with winter triticale were conducted at the LIA in Dotnuva on a light loam Endocalcari - Epihypogleyic Cambisol. The goal of the field trials was to determine the optimal conditions for winter triticale nitrogen nutrition and to estimate nitrogen fertilizer efficacy taking into account mineral nitrogen content in the soil. Our experimental evidence suggests that nitrogen fertilizers were net effective every year, the regularities of grain yield variation resulting from fertilizer application also differed. A grain yield increase of 19.5–24.0 % was obtained through nitrogen fertilizer application. A rate of N90 was found to be optimal for triticale in our trials. Fertilizer efficacy is presented in kilos – averaged data suggest that when winter triticale had received N60, N90 and N120, 1 kg of fertilizer nitrogen produced 19.9+-7.46 kg, 16.5+-6.00 kg and 12.7+-5.02 kg of grain, respectively. Additional fertilization of triticale was effective only in the normally wet years. Having fertilized triticale with N90 and N120, in the years conducive to the spread of diseases (2000– 2001), a significant yield increase was obtained through fungicide application.
Afficher plus [+] Moins [-]letton. Laika periodā no 2000.-2004. gadam Dotnuvā Lietuvas Zemkopības institūtā viegla smilšmāla augsnēs (Endocalcari – Epihypogleyic Cambisol) ar mērķi noteikt optimālos apstākļus mēslošanai ar slāpekli un novērtēt slāpekļa mēslojuma iedarbību, Ņemot vērā minerālā slāpekļa saturu augsnē, tika veikti lauka izmēģinājumi ar ziemas tritikāli. Rezultāti liecina, ka mēslošana ar slāpekli ne katru gadu ir efektīva, graudu raža atšķirīgi variēja arī mēslojuma devas ietekmē. Lietojot slāpekļa mēslojumu, tika iegūts graudu ražas pieaugums 19.5–24.0 %. Izmēģinājumos kā optimālā slāpekļa norma tritikālei tika noteikta N90. Dati liecina, ka ar katru mēslojuma kilogramu ziemas tritikālei pie devas N60, N90 un N120, ražas pieaugums ir attiecīgi 19.9+-7.46 kg, 16.5+-6.00 kg un 12.7+-5.02 kg graudu. Tritikāles papildus mēslošana bija efektīva tikai normāli mitros gados. Pie mēslojuma devas N90 un N120 slimību izplatībai labvēlīgos gados (2000–2001), nozīmīgs ražas pieaugums tika iegūts, izmantojot fungicīdus.
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