Tanzania grass leaf absorption of ammonia volatilized from <sup>15</sup>N-urea applied to soil

Júnior, Geraldo Bueno Martha; Trivelin, Paulo Cesar Ocheuze; Corsi, Moacyr

Rev. Bras. Ciênc. Solo.2009;33(1):103-8.

Tanzania grass leaf absorption of ammonia volatilized from ¹⁵N-urea applied to soil

Geraldo Bueno Martha Júnior, Paulo Cesar Ocheuze Trivelin, Moacyr Corsi

01/Feb/2009

DOI: 10.1590/S0100-06832009000100011

The effect of urea-N rates (40, 80 and 120 kg ha^-1 N) and the distance (0, 27 and 35 cm) from sink (leaf) to source (urea applied to soil) on leaf absorption of ammonia by the pasture species Panicum maximum cv. Tanzania was evaluated. A randomized design was used in a split-plot arrangement with four replicates. The distance had no effect on leaf ammonia absorption (p < 0.05), but the absorption decreased exponentially (p < 0.05) with increasing N-rates or ammonia volatilization rates. Leaf ammonia absorption varied from 2.5 to 16.4 % of the volatilized N.

Tanzania grass leaf absorption of ammonia volatilized from ¹⁵N-urea applied to soil

N losses; N recovery; N use efficiency; tropical pasture

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Rev. Bras. Ciênc. Solo.2009;33(1):103-8.

Tanzania grass leaf absorption of ammonia volatilized from 15N-urea applied to soil

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Tanzania grass leaf absorption of ammonia volatilized from ¹⁵N-urea applied to soil