Effects of exogenous L-Glutamine as a sole nitrogen source on physiological characteristics and nitrogen use efficiency of poplar

In order to determine the nitrogen use efficiency of plantlets in vitro under different nitrogen source, near infrared spectroscopy technique and image analysis technique with multi-references were used to obtain the successive information of nitrogen consumption. The Logistic and nonlinear hyperbolic equations were used for fitting the relationship of biomass of plantlet in vitro and culture time, nitrogen utilization of plantlets and culture time, and nitrogen utilization of plantlets and biomass of plantlet in vitro. The models of growth prediction, nitrogen utilization and nitrogen use efficiency of plantlets in vitro were established. The nitrogen use efficiency of Atractylodes lancea plantlets in vitro sub-cultured in different nitrogen source and levels were measured, which decreased with the increase of culture time. Ammonium (0.096 g L-1) / nitrate (0.555 g L-1) was the preferred nitrogen sources combination for the growth of Atractylodes lancea plantlets in vitro.

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Nitrogen Source and Rate Effects on Irrigated Corn Yields and Nitrogen-Use Efficiency

Agronomy Journal ◽

10.2134/agronj2013.0001 ◽

2014 ◽

Vol 106 (2) ◽

pp. 681-693 ◽

Cited By ~ 23

Author(s):

Ardell D. Halvorson ◽

Michael E. Bartolo

Keyword(s):

Nitrogen Source ◽

Nitrogen Use Efficiency ◽

Nitrogen Use ◽

Rate Effects ◽

Use Efficiency

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Nitrogen Use Efficiency and Onion Yield Increased with a Polymer-coated Nitrogen Source

HortScience ◽

10.21273/hortsci.37.2.338 ◽

2002 ◽

Vol 37 (2) ◽

pp. 338-342 ◽

Cited By ~ 24

Author(s):

Dan Drost ◽

Rich Koenig ◽

Terry Tindall

Keyword(s):

Nitrogen Source ◽

Nitrogen Use Efficiency ◽

N Use Efficiency ◽

N Losses ◽

Nitrogen Use ◽

Use Efficiency ◽

Cropping Seasons ◽

Polymer Coated Urea ◽

N Use ◽

Bulb Yield

Nitrogen (N) losses can be substantial in furrow-irrigated onions (Allium cepa L.). Polymer-coated urea (PU) may reduce N losses and result in an increase in productivity. In this study, we investigated the effects of different rates and blends of urea and PU on onion yield and N use for two cropping seasons. Nitrogen was applied at 112, 168, and 224 kg·ha-1 as PU or urea. In addition, three PU/urea blends equal to 224 kg·ha-1 of N were compared. Plant growth and N concentration, soil nitrate concentrations, and bulb yield were evaluated each year. Onion yield decreased by 95 Mg·ha-1 for each 25% increase in the proportion of urea in the fertilizer blends. Reducing the N rates from 224 to 112 kg·ha-1 had minimal effect on bulb yield when all the fertilizer was supplied by urea. A reduction of N applied from 224 to 168 kg·ha-1 had little effect on yield, although a further reduction to 112 kg·ha-1 did significantly reduce bulb yield when the entire N was supplied from PU. Nitrogen source and rate had no effect on bulb maturity and only minor effects on leaf area and storage potential. Soil sampling indicated that more N was retained in PU-treated onion beds than in urea-treated beds, which improved nitrogen use efficiency. In addition, N use efficiency improved when there was more PU in the blend and when PU was compared with urea at the same rate. We conclude that the use of PU can dramatically improve N use efficiency and productivity in direct-seeded onions.

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Faculty Opinions recommendation of Leaf-level nitrogen use efficiency: definition and importance.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.717964300.793465842 ◽

2012 ◽

Author(s):

Christian Körner

Keyword(s):

Nitrogen Use Efficiency ◽

Nitrogen Use ◽

Leaf Level ◽

Use Efficiency

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Faculty Opinions recommendation of PvNAC1 and PvNAC2 Are Associated with Leaf Senescence and Nitrogen Use Efficiency in Switchgrass.

Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature ◽

10.3410/f.726131278.793514339 ◽

2016 ◽

Author(s):

Elizabeth Hood

Keyword(s):

Leaf Senescence ◽

Nitrogen Use Efficiency ◽

Nitrogen Use ◽

Use Efficiency

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

IRAQI JOURNAL OF AGRICULTURAL SCIENCES ◽

10.36103/ijas.v51i4.1093 ◽

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.

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