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result(s) for
"Slow-concentration fertilizer"
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Effects of coating agents on nitrogen dynamics and yield of wheat (Triticum aestivum L.) under irrigated and rainfed conditions
by
Tahir, Mukkram Ali
,
Al-Qahtani, Wahidah H.
,
Abdel-Maksoud, Mostafa A.
in
631/449
,
704/106
,
704/844
2025
Nitrogenous (N) fertilizers are widely applied in agriculture for improving crop yield. However, significant quantity of chemically-applied N is lost leading to low nitrogen use efficiency (NUE). Therefore, two laboratory incubation studies were designed to evaluate the effects of different coating agents [no coating, neem (
Azadrichta indica
) oil coating and potassium ammonium phosphate (PAP) coating) on urea hydrolysis and nitrification under varying temperatures (25, 35 and 40 °C) and moisture regimes (30, 60 and 90% of field capacity). Results revealed that the NH
4
+
and NO
3
−
concentrations increased both with temperature and moisture levels. Using the organic-coated neem oil coated urea (NOCU) significantly reduced the release of NH
4
+
and NO
3
−
. Thereafter, a field experiment was conducted to explore the best coating agent [N
0
, 100% conventional urea, 75, 50 and 25% of recommended neem oil coated urea (NOCU)] using irrigated (Akbar-2019) and rainfed (Barani-2017) wheat cultivars. Even the reduced rates (50%) of the recommended NOCU performed at par to 100% recommended uncoated urea fertilizers. Application of 1% NOCU @ 75% of the recommended urea resulted in maximum grain yield (3.65 Mg ha
− 1
), N in roots (0.87%), N in straw (0.85%) and N in grains (1.07%) in irrigated wheat variety (Akbar-2019). Thus, using 1% neem oil coated urea @ 75% of the recommended uncoated urea has the potential to enhance the growth, yield, N uptake and NUE in wheat effectively under both rain fed and irrigated conditions.
Journal Article