Vol. 4, Issue 6 (2019)
Urea and nano-nitrogen fertigation and foliar application of nano-boron and nano-molybdenum on water use efficiency, agronomic efficiency and elements use efficiency by potato plants (Solanum tuberosum. l)
Author(s): Hayyawi WA Al-juthery, Estabraq Hilal Obaid Al-Maamouri
Abstract: Investigating the effect of fertigation of urea and nano-nitrogen and the foliar application nano-boron and nano-molybdenum on water use efficiency, agronomic efficiency and elements use efficiency by Potato Plants (Solanum tuberosum. L) [Rivera –A], A field experiment was conducted during autumn season 2018 in a private farm located in Al-Taliah area - Babylon governorate. The experiment consisted of 12 treatments: separated fertigation of nano-nitrogen (25% N) and urea (46% N), separated foliar application of nano molybdenum (5% Mo), Nano 9 (9% B), nano binary combinations treatments of nano (Mo+B) and (U+Mo), (U+B), Nano (N +Mo), Nano (N+B), and tricombinations treatment of (U+Mo+B), Nano (N+Mo+B) in addition to control treatment. This field trial was conducted in accordance with the (RCBD) design and one way simple experiment with three replicates. The fertilizers were applied at levels of (40) liters h-1 of nano-N-fertilizer (25% N) and (300) kg h-1 urea fertilizer (46% N) four times. The solutions were sprayed early in the morning after (40) days of planting four times with periods of two weeks from an application and another and as recommended by (1) kg nano fertilizer of B.h-1 and (500)g nano fertilizer of Mo h-1. (NUE) varied according to its source Nano nitrogen or urea, (MoUE) and (BUE) according to its combinations. Efficiency of NUE (90.6, 92.9, 94.48 and 96.7) % for nano fertigation and foliar application treatments (N, N + Mo, N + B and N + Mo + B), respectively. NUE for urea fertilizer was (40.29, 42.05, 45.26 and 50.52) for fertigation and foliar application treatments (U, U + Mo, U + B and U + Mo + B), respectively. The efficiency of nano molybdenum use valued (80, 84, 88, 92, 96, 96.7) % for fertigation and and foliar application of the treatments of (Mo, Mo + B, U + Mo, U + Mo + B, N + Mo and N + Mo + B), respectively. The efficiency of the use of nano-boron (78.88, 81.11, 85.55, 89.22, 91.11 and 97.77) % for fertigation and foliar application of the treatments of (B, Mo + B, U + B, U + Mo+ B, NB and N+ Mo+ B) sequentially. The single application treatment of nano (Mo) fertilizer resulted in the highest field efficiency (2747.3) kg-1.