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- Title
Maize plant nitrogen uptake dynamics at limited irrigation water and nitrogen.
- Authors
Hammad, Hafiz; Nasim, Wajid; Farhad, Wajid; Abbas, Farhat; Fahad, Shah; Saeed, Shafqat; Bakhat, Hafiz
- Abstract
Knowledge of the dynamics of plant nitrogen (N) uptake at varying irrigation water levels is critical for strategizing increased N recovery efficiency (NRE), water use efficiency (WUE), and maize yield. The N dynamics were studied under various irrigation regimes to evaluate NRE, WUE, and maize yield. A pot experiment was conducted using three irrigation water regimes (50, 75, and 100% field capacity (FC)) and four N fertilizer rates (0, 1.6, 3.2, and 4.8 g pot) applied with two fertilizer application methods including foliar and soil applications. The highest plant growth and grain yields were achieved by application of 4.8 g N pot with 100% FC. Contrarily, the maximum WUE (7.0 g L) was observed by the lowest irrigation water (50% FC) with the highest N fertilizer rates (4.8 g pot). Nitrogen concentration in the stem and grain was linearly increased by increasing N fertilizer rates with irrigation water. However, in the root, N concentration was decreased when the crop was supplied with 100% FC. In plant, maximum N uptake (6.5 mg g) was observed when 4.8 g N pot was applied with 100% FC. Nitrogen recovery efficiency was increased by increasing N rate up to 3.2 g pot with 100% FC. Therefore, for achieving maximum WUE and NRE, the highest water and N applications, respectively, are not necessary.
- Subjects
CORN; NITROGEN fertilizers; PLANT nutrition; PLANT nutrients; WATER use
- Publication
Environmental Science & Pollution Research, 2017, Vol 24, Issue 3, p2549
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-016-8031-0