Proof of concept: nitrogen use efficiency of contrasting spring wheat varieties grown in greenhouse and field

2013 ◽  
Vol 374 (1-2) ◽  
pp. 829-842 ◽  
Author(s):  
Linnéa Asplund ◽  
Göran Bergkvist ◽  
Martin Weih
Keyword(s):  
Spring Wheat ◽  
Nitrogen Use Efficiency ◽  
Proof Of Concept ◽  
Wheat Varieties ◽  
Nitrogen Use ◽  
Use Efficiency

ROLE OF CONSERVATION AGRICULTURE IN IMPROVING PRODUCTION WATER AND NITROGEN EFFICIENCY OF WHEAT UNDER RAINFED CONDITIONS

2020 ◽  
Vol 51 (4) ◽  
pp. 1139-1148
Author(s):  
Othman & et al.
Keyword(s):  
Crop Rotation ◽  
Nitrogen Use Efficiency ◽  
Agricultural Research ◽  
Research Work ◽  
Conservation Agriculture ◽  
Nitrogen Efficiency ◽  
Research Station ◽  
Wheat Varieties ◽  
Nitrogen Use ◽  
Use Efficiency

The research work was conducted in Izra’a Research station, which affiliated to the General Commission for Scientific Agricultural Research (GCSAR), during the growing seasons (2016 – 2017; 2017 – 2018), in order to evaluate the response of two durum wheat verities (Douma3 and Cham5) and two bread wheat varieties (Douma4 and Cham6) to Conservation Agriculture (CA) as a full package compared with Conventional Tillage system (CT) under rainfed condition using lentils (Variety Edleb3) in the applied crop rotation. The experiment was laid according to split-split RCBD with three replications. The average of biological yield, grain yield,  rainwater use efficiency and nitrogen use efficiency was significantly higher during the first growing season, under conservation agriculture in the presence of crop rotation, in the variety Douma3 (7466 kg. ha-1, and 4162kg. ha-1, 19.006 kg ha-1 mm-1,  39.62 kg N m-2respectively). The two varieties Douma3 and Cham6 are considered more responsive to conservation agriculture system in the southern region of Syria, because they recorded the highest grain yields (2561, 2385 kg ha-1 respectively) compared with the other studied varieties (Cham5 and Douma4) (1951 and 1724 kg ha-1 respectively). They also exhibited the highest values of both rainwater and nitrogen use efficiency.

Response of spring wheat to boron-coated urea and its effect on nitrogen use efficiency

2017 ◽  
Vol 40 (13) ◽  
pp. 1920-1927 ◽  
Author(s):  
Yashbir Singh Shivay ◽  
Rajendra Prasad ◽  
Vijay Pooniya ◽  
Madan Pal ◽  
Radhika Bansal
Keyword(s):  
Spring Wheat ◽  
Nitrogen Use Efficiency ◽  
Nitrogen Use ◽  
Coated Urea ◽  
Use Efficiency

scholarly journals Effects of increased ammonia on root/shoot ratio, grain yield and nitrogen use efficiency of two wheat varieties with various N supply

2009 ◽  
Vol 55 (No. 7) ◽  
pp. 273-280 ◽  
Author(s):  
Jing Li ◽  
Shi-Qing Li ◽  
Yi Liu ◽  
Xiao-Li Chen
Keyword(s):  
Grain Yield ◽  
Nitrogen Use Efficiency ◽  
High Water ◽  
Growth And Yield ◽  
Resistant Variety ◽  
Wheat Varieties ◽  
Nitrogen Use ◽  
Positive Effects ◽  
Use Efficiency ◽  
N Treatment

The effects of elevated atmospheric NH<sub>3</sub> on growth and yield parameters of two winter wheat varieties, the high water and fertilizer-demanding variety Xiaoyan 6 (XY6) and the drought-resistant variety Changhan 58 (CH58), grown with two levels of N fertilization, were studied in Open-Top Chambers. The results showed that in combination with the high N treatment increasing the atmospheric NH<sub>3</sub> concentration to 1000 nl/l from the ambient level of 10 nl/l NH<sub>3</sub> significantly (<I>P</I> < 0.05) reduced the biomass and the root/shoot ratios of the plants, especially in XY6 plants, mainly because it negatively influenced root biomass production at anthesis and mature stages. In addition, the grain yield of XY6 was by 1.51% higher, while that of CH58 was 13.2% lower, following exposure to the elevated atmospheric NH<sub>3</sub> concentration rather than the ambient concentration in combination with the high N treatment. In contrast, in combination with the low N treatment, elevated atmospheric NH<sub>3</sub> had significantly and non-significantly positive effects on the grain yield of XY6 and CH58 plants, respectively. The Nitrogen Use Efficiency (NUE) and related parameters were all lower in plants of both varieties exposed to the high atmospheric NH3 concentration together with either the high or low N treatment.

Phenotyping approaches to evaluate nitrogen-use efficiency related traits of diverse wheat varieties under field conditions

2016 ◽  
Vol 67 (11) ◽  
pp. 1139 ◽  
Author(s):  
Giao N. Nguyen ◽  
Joe Panozzo ◽  
German Spangenberg ◽  
Surya Kant
Keyword(s):  
Nitrogen Use Efficiency ◽  
Vegetation Index ◽  
Growth Yield ◽  
Economic Cost ◽  
Field Conditions ◽  
Genotypic Differences ◽  
Wheat Varieties ◽  
Nitrogen Use ◽  
Normalised Difference Vegetation Index ◽  
Use Efficiency

Nitrogen (N) is a key mineral element required for crop growth, yield and quality. Nitrogen-use efficiency (NUE) in crop plants is low despite significant research efforts. Excessive use of N fertiliser results in significant economic cost and contributes to environmental pollution. Therefore, it is crucial to develop crop varieties with improved NUE, and this requires efficient phenotyping approaches to screen genotypes under defined N conditions. To address this, 15 wheat (Triticum aestivum L.) varieties, grown under three N levels, were phenotyped for NUE-related traits under field conditions. Significant genotypic differences were observed in varieties having low to high responsiveness to N applications. The results suggest that basal low N can be used to screen wheat varieties that are less responsive to N, whereas N supply from 80 to 160 kg N ha–1 could be used to screen high N-responsive varieties. Normalised difference vegetation index (NDVI) measured by using Crop Circle, and SPAD units measured by SPAD meter at heading stage, were well correlated with shoot dry biomass, grain yield, and shoot and grain N concentration, and could potentially be used as tools to phenotype different wheat varieties under varying N treatments. The data also demonstrated that NDVI and SPAD could be used to differentiate wheat varieties phenotypically for NUE-related traits. The prospect of utilising efficient, non-destructive phenotyping to study NUE in crops is also discussed.

PAPER PRESENTED AT INTERNATIONAL WORKSHOP ON INCREASING WHEAT YIELD POTENTIAL, CIMMYT, OBREGON, MEXICO, 20–24 MARCH 2006 Reduced nitrogen and improved farm income for irrigated spring wheat in the Yaqui Valley, Mexico, using sensor based nitrogen management

2007 ◽  
Vol 145 (3) ◽  
pp. 215-222 ◽  
Author(s):  
J. I. ORTIZ-MONASTERIO ◽  
W. RAUN
Keyword(s):  
Technology Transfer ◽  
Spring Wheat ◽  
Nitrogen Use Efficiency ◽  
Nitrogen Management ◽  
Farm Income ◽  
Wheat Crop ◽  
Nitrogen Use ◽  
Yaqui Valley ◽  
Crop Cycle ◽  
Use Efficiency

Wheat nitrogen-use efficiency in the Yaqui Valley has been estimated at about 0·31. The nitrogen that is not recovered by the crop has important environmental costs that have regional and global consequences. In addition, these nitrogen losses represent an important reduction in farm income. The objective of the present work was to validate a technology that includes the use of N-rich strips together with the GreenSeeker™ sensor and a crop algorithm in farmers' fields with the ultimate goal of improving nitrogen-use efficiency through site-specific nitrogen management in irrigated spring wheat. During the wheat crop cycle 2002/03 and 2003/04, 13 validation experiments of c. 1 ha each were established in farmers' fields in the Yaqui Valley. After the validation phase, during the wheat crop cycle 2005/06, eight technology transfer trials were established in farmers' fields; these had on an average an area of 10 ha each. Both the validation and technology transfer trials compared the farmers' conventional nitrogen management use v. the use of the N-rich strip together with the Green Seeker™ sensor and a crop algorithm to derive N recommendations for each individual field. The results of the validation trials showed that on an average over all locations, farmers were able to save 69 kg N/ha, without any yield reduction. At the price of US$0.9 per unit of N in the valley when these experiments were established, this represented savings to the farmers of US$62/ha. The technology transfer trials demonstrated that, in large commercial areas with an average size of 10 ha, farmers could improve their farm income by US$50/ha, when using sensor based N management. The combination of the N-rich strip, together with the use of the sensor and a crop algorithm to interpret the results from the sensor, allowed farmers to obtain significant savings in N use and thus in farm profits. Farm income was increased by US$56/ha, when averaged over all trials in all years.

Nitrogen use efficiency in spring wheat: genotypic variation and grain yield response under sandy soil conditions

2017 ◽  
Vol 155 (9) ◽  
pp. 1407-1423 ◽  
Author(s):  
E. MANSOUR ◽  
A. M. A. MERWAD ◽  
M. A. T. YASIN ◽  
M. I. E. ABDUL-HAMID ◽  
E. E. A. EL-SOBKY ◽  
...  
Keyword(s):  
Grain Yield ◽  
Sandy Soil ◽  
Spring Wheat ◽  
Nitrogen Use Efficiency ◽  
Genotypic Variation ◽  
Utilization Efficiency ◽  
Soil Conditions ◽  
Nitrogen Use ◽  
N Concentration ◽  
Use Efficiency

SUMMARYAgricultural practices are likely to lower nitrogen (N) fertilization inputs for economic and ecological limitation reasons. The objective of the current study was to assess genotypic variation in nitrogen use efficiency (NUE) and related parameters of spring wheat (Triticum aestivumL.) as well as the relative grain yield performance under sandy soil conditions. A sub-set of 16 spring wheat genotypes was studied over 2 years at five N levels (0, 70, 140, 210 and 280 kg N/ha). Results indicated significant differences among genotypes and N levels for grain yield and yield components as well as NUE. Genotypes with high NUE exhibited higher plant biomass, grain and straw N concentration and grain yield than those with medium and low NUE. Utilization efficiency (grain-NUtE) was more important than uptake efficiency (total NUpE) in association with grain yield. Nitrogen supply was found to have a substantial effect on genotype; Line 6052 as well as Shandawel 1, Gemmiza 10, Gemmiza 12, Line 6078 and Line 6083 showed higher net assimilation rate, more productive tillers, increased number of spikes per unit area and grains per spike, extensive N concentration in grain and straw, heavier grains, higher biological yield and consequently maximized grain yield. The relative importance of NUE-associated parameters such as nitrogen agronomic efficiency, nitrogen physiological efficiency and apparent nitrogen recovery as potential targets in breeding programmes for increased NUE genotypes is also mentioned.

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