scholarly journals Productivity and Nitrogen Use Efficiency of Wheat Varieties in Relation to Nitrogen Levels under Rainfed Conditions of North-western India

2017 ◽  
Vol 6 (10) ◽  
pp. 558-563
Author(s):  
Hari Ram ◽  
G.S. Mavi ◽  
Neha Gupta ◽  
S.S. Dhaliwal ◽  
V.S. Sohu
Keyword(s):  
Nitrogen Use Efficiency ◽  
Western India ◽  
Wheat Varieties ◽  
Nitrogen Use ◽  
Nitrogen Levels ◽  
Rainfed Conditions ◽  
Use Efficiency ◽  
North Western

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.

scholarly journals Yield components and reproductive, physiological, and root traits used in early selection for nitrogen use efficiency in corn

2018 ◽  
Vol 53 (5) ◽  
pp. 620-632
Author(s):  
Pedro Patric Pinho Morais ◽  
Massaine Bandeira e Sousa ◽  
Giovanni Galli ◽  
Luciano Rogério Braatz e Andrade ◽  
Roberto Fritsche-Neto ◽  
...  
Keyword(s):  
Nitrogen Use Efficiency ◽  
Yield Components ◽  
Selection Index ◽  
Root Traits ◽  
Early Selection ◽  
Nitrogen Use ◽  
Nitrogen Levels ◽  
Differential Behavior ◽  
Use Efficiency ◽  
Selection For

Abstract: The objective of this work was to examine the possibility of using yield components and reproductive, physiological, and root traits in early selection for nitrogen use efficiency (NUE) in corn. Sixty-four inbred lines were evaluated under two nitrogen fertilization levels: ideal and low. The evaluations were performed at three phenological stages: eight fully-expanded leaves, tasseling stage, and physiological maturity. It is possible to select superior lines for NUE, but the yield components did not show differential behavior under the different nitrogen levels evaluated. Root, reproductive, and physiological traits are not promising for early selection of corn lines with high NUE. Likewise, the eight-leaves and tasseling stages were not promising for this purpose, since NUE should be estimated taking grain yield into account. However, indirect selection for NUE can be performed via number of ears or using the selection index considering number and weight of ears.

scholarly journals Water and nitrogen water use efficiency in forage palm irrigated with salt water in the Neossolo

2020 ◽  
pp. 683-690
Author(s):  
Patrícia Ferreira da Silva ◽  
Rigoberto Moreira de Matos ◽  
José Dantas Neto ◽  
Vitória Ediclécia Borges ◽  
Thiago Galvão Sobrinho ◽  
...  
Keyword(s):  
Nitrogen Use Efficiency ◽  
Nitrogen Fertilization ◽  
Arid Region ◽  
Saline Water ◽  
Salt Water ◽  
Nitrogen Use ◽  
Nitrogen Levels ◽  
Use Efficiency ◽  
Semi Arid Region ◽  
Semi Arid

The objectives were to analyze the water and nitrogen use efficiency by forage palm in different irrigation depths with saline water and nitrogen fertilization levels in the Brazilian semi-arid region. The experiment was conducted under field condition during one year of cultivation (360 days). The experimental design was a complete randomized block and 5 x 5 factorial scheme with five irrigation depths (125, 100, 75, and 25% of ET0) and five levels of nitrogen fertilization (0, 150, 300, 450 and 600 kg ha-1 of N) and three replicates. Irrigation and acceptable nitrogen fertilization resulted in a good water and fertilization management. Water and nitrogen use efficiency of forage palm were higher, when water depths and the nitrogen levels supplied to the soil were increased. The 125% ET0 depth showed a higher efficiency of water and nitrogen use in the forage palm during 360 days of study. In conditions of low nitrogen supply, the efficiency of nitrogen use is directly and indirectly associated with the fresh mass yield; while under high supply, the efficiency of the use of nitrogen is more effective. The use of irrigation and nitrogen fertilization in the semi-arid region is recommended to obtain higher productivity of water and nitrogen from the forage palm.

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.

Productivity and nitrogen use efficiency parameters in cotton cultivars with varying N levels and soil types under rainfed conditions

2007 ◽  
Vol 55 (3) ◽  
pp. 383-391 ◽  
Author(s):  
M. Venugopalan ◽  
K. Hebbar ◽  
P. Tiwary ◽  
S. Chatterji ◽  
V. Ramamurthy ◽  
...  
Keyword(s):  
Nitrogen Use Efficiency ◽  
Production Efficiency ◽  
N Uptake ◽  
Utilization Efficiency ◽  
Nitrogen Use ◽  
Uptake Efficiency ◽  
N Uptake Efficiency ◽  
N Utilization ◽  
Rainfed Conditions ◽  
Use Efficiency

A field experiment was conducted under rainfed conditions, on a shallow soil (Inceptisol) underlain with weathered basalt and on a deep soil (Vertisol) to evaluate three cotton cultivars [AKH 4 ( Gossypium arboreum ), LRK 516 ( G. hirsutum ) and NHH 44 (intra- hirsutum hybrid)] under four levels of N (0, 40, 80 and 120 kg ha −1 ) and to analyse the variations in productivity using the nitrogen use efficiency (NUE) parameter. The yield of AKH4 and NHH 44 was 101 and 89% higher than that of LRK 516. The yield and the response to N were higher on the Inceptisol. The enhanced yield and NUE of AKH 4 and NHH 44 were attributed to the improved efficiency of N uptake utilization. NUE declined from 21.6 at 40 kg ha −1 to 7.7 at 120 kg N ha −1 . The N uptake efficiency and N utilization efficiency were independent of each other, but complemented each other in improving NUE. The implications of variations in NUE, N uptake efficiency and N utilization efficiency and their components, N biomass production efficiency and HI, in cotton breeding and agronomy are also discussed.

Sign in / Sign up

Export Citation Format

Share Document