A STELLA-Based Model to Simultaneously Predict Hydrological Processes, N Uptake and Biomass Production in a Eucalyptus Plantation

Eucalyptus is one of the fastest growing hardwoods for bioenergy production. Currently, few modeling tools exist to simultaneously estimate soil hydrological processes, nitrogen (N) uptake, and biomass production in a eucalyptus plantation. In this study, a STELLA (Structural Thinking and Experiential Learning Laboratory with Animation)-based model was developed to meet this need. After the model calibration and validation, a simulation scenario was developed to assess eucalyptus (E. grandis × urophylla) annual net primary production (ANPP), woody biomass production (WBP), water use efficiency (WUE), and N use efficiency (NUE) for a simulation period of 20 years. Simulation results showed that a typical annual variation pattern was predicted for water use, N uptake, and ANPP, increasing from spring to fall and decreasing from fall to the following winter. Overall, the average NUE during the growth stage was 700 kg/kg. To produce 1000 kg eucalyptus biomass, it required 114.84 m3 of water and 0.92 kg of N. This study suggests that the STELLA-based model is a useful tool to estimate ANPP, WBP, WUE, and NUE in a eucalyptus plantation.

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Genotypic Effects of Fertilization on Seedling Sweetgum Biomass Allocation, N Uptake, and N Use Efficiency

The Scientific World JOURNAL ◽

10.1100/tsw.2001.275 ◽

2001 ◽

Vol 1 ◽

pp. 407-414 ◽

Cited By ~ 2

Author(s):

Scott X. Chang ◽

Daniel J. Robison

Keyword(s):

Biomass Production ◽

N Uptake ◽

N Use Efficiency ◽

Total N ◽

Nutrient Use ◽

Use Efficiency ◽

P Application ◽

N Use ◽

Nutrient Use Efficiencies ◽

N Additions

Screening and selecting tree genotypes that are responsive to N additions and that have high nutrient use efficiencies can provide better genetic material for short-rotation plantation establishment. A pot experiment was conducted to test the hypotheses that (1) sweetgum (Liquidambar styraciflua L.) families have different patterns in biomass production and allocation, N uptake, and N use efficiency (NUE), because of their differences in growth strategies, and (2) sweetgum families that are more responsive to N additions will also have greater nutrient use efficiencies. Seedlings from two half-sib families (F10022 and F10023) that were known to have contrasting responses to fertility and other stress treatments were used for an experiment with two levels of N (0 vs. 100 kg N/ha equivalent) and two levels of P (0 vs. 50 kg P/ha equivalent) in a split-plot design. Sweetgum seedlings responded to N and P treatments rapidly, with increases in both size and biomass production, and those responses were greater with F10023 than with F10022. Growth response to N application was particularly strong. N and P application increased the proportional allocation of biomass to leaves. Under increased N supply, P application increased foliar N concentration and content, as well as total N uptake by the seedlings. However, NUE was decreased by N addition and was higher in F10023 than in F10022 when P was not limiting. A better understanding of genotype by fertility interactions is important in selecting genotypes for specific site conditions and for optimizing nutrient use in forestry production.

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INFLUENCE OF THE SYSTEM OF RICE INTENSIFICATION ON RICE YIELD AND NITROGEN AND WATER USE EFFICIENCY WITH DIFFERENT N APPLICATION RATES

Experimental Agriculture ◽

10.1017/s0014479709007583 ◽

2009 ◽

Vol 45 (3) ◽

pp. 275-286 ◽

Cited By ~ 70

Author(s):

LIMEI ZHAO ◽

LIANGHUAN WU ◽

YONGSHAN LI ◽

XINGHUA LU ◽

DEFENG ZHU ◽

...

Keyword(s):

Water Use Efficiency ◽

Water Use ◽

N Use Efficiency ◽

System Of Rice Intensification ◽

N Application ◽

Application Rates ◽

Rice Intensification ◽

Use Efficiency ◽

N Rates ◽

N Use

SUMMARYField experiments were conducted in 2005 and 2006 to investigate the impacts of alternative rice cultivation systems on grain yield, water productivity, N uptake and N use efficiency (ANUE, agronomic N use efficiency; PFP, partial factor productivity of applied N). The trials compared the practices used with the system of rice intensification (SRI) and traditional flooding (TF). The effects of different N application rates (0, 80, 160 and 240 kg ha−1) and of N rates interacting with the cultivation system were also evaluated. Resulting grain yields with SRI ranged from 5.6 to 7.3 t ha−1, and from 4.1 to 6.4 t ha−1 under TF management. On average, grain yields under SRI were 21% higher in 2005 and 22% higher in 2006 than with TF. Compared with TF, SRI plots had higher harvest index across four fertilizer N rates in both years. However, there was no significance difference in above-ground biomass between two cultivation systems in either year. ANUE was increased significantly under SRI at 80 kg N ha−1 compared with TF, while at higher N application rates, ANUE with SRI was significantly lower than TF. Compared with TF, PFP under SRI was higher across all four N rates in both years, although the difference at 240 kg N ha−1 was not significant. As N rate increased, the ANUE and PFP under both SRI and TF significantly decreased. Reduction in irrigation water use with SRI was 40% in 2005 and 47% in 2006, and water use efficiency, both total and from irrigation, were significantly increased compared to TF. With both SRI and TF, the highest N application was associated with decreases in grain yield, N use efficiency and water use efficiency. This is an important finding given current debates whether N application rates in China are above the optimum, especially considering consequences for soil and water resources. Cultivation system, N rates and their interactions all produced significant differences in this study. Results confirmed that optimizing fertilizer N application rates under SRI is important to increase yield, N use efficiency and water use efficiency.

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Water use, water limitation, and water use efficiency in a Eucalyptus plantation

Bosque (Valdivia) ◽

10.4067/s0717-92002004000200004 ◽

2004 ◽

Vol 25 (2) ◽

Cited By ~ 20

Author(s):

JOSE LUIZ STAPE ◽

DAN BINKLEY ◽

MICHAEL G RYAN ◽

ANTONIO DO NASCIMENTO GOMES

Keyword(s):

Water Use Efficiency ◽

Water Use ◽

Water Limitation ◽

Eucalyptus Plantation ◽

Use Efficiency

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Rice NIN-LIKE PROTEIN 4 is a master regulator of nitrogen use efficiency

10.1101/2020.01.16.908558 ◽

2020 ◽

Author(s):

Jie Wu ◽

Zi-Sheng Zhang ◽

Jing-Qiu Xia ◽

Alamin Alfatih ◽

Ying Song ◽

...

Keyword(s):

N Uptake ◽

Crop Improvement ◽

Field Trials ◽

Growth And Yield ◽

Wild Type ◽

Inorganic N ◽

Master Regulator ◽

Nitrogen Use ◽

Use Efficiency ◽

N Use

AbstractNitrogen (N) is one of the key essential macronutrients that affects rice growth and yield. Inorganic N fertilizers are excessively used to boost yield and generate serious collateral environmental pollution. Therefore, improving crop N use efficiency (NUE) is highly desirable and has been a major endeavor in crop improvement. However, only a few regulators have been identified that can be used to improve NUE in rice to date. Here we show that the NIN-like protein OsNLP4 significantly improves the rice NUE and yield. Field trials consistently showed that loss-of-OsNLP4 dramatically reduced yield and NUE compared with wild type under different N regimes. In contrast, the OsNLP4 overexpression lines remarkably increased yield by 30% and NUE by 47% under moderate N level compared with wild type. Transcriptomic analyses revealed that OsNLP4 orchestrates the expression of a majority of known N uptake, assimilation and signaling genes by directly binding to the nitrate-responsive cis-element in their promoters to regulate their expression. Moreover, overexpression of OsNLP4 can recover the phenotype of Arabidopsis nlp7 mutant and enhance its biomass. Our results demonstrate that OsNLP4 is a master regulator of NUE in rice and sheds light on crop NUE improvement.

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Comparison of water use efficiency and biomass production in 10-year-old Populus sibirica and Ulmus pumila plantations in Lun soum, Mongolia

Forest Science and Technology ◽

10.1080/21580103.2019.1634646 ◽

2019 ◽

Vol 15 (3) ◽

pp. 147-158 ◽

Cited By ~ 1

Author(s):

Sungsik Cho ◽

Byambadorj Ser-Oddamba ◽

Nyam-Osor Batkhuu ◽

Hyun Seok Kim

Keyword(s):

Water Use Efficiency ◽

Water Use ◽

Biomass Production ◽

Ulmus Pumila ◽

Use Efficiency

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MYB61 is regulated by GRF4 and promotes nitrogen utilization and biomass production in rice

Nature Communications ◽

10.1038/s41467-020-19019-x ◽

2020 ◽

Vol 11 (1) ◽

Author(s):

Yihong Gao ◽

Zuopeng Xu ◽

Lanjun Zhang ◽

Shance Li ◽

Shaogan Wang ◽

...

Keyword(s):

Biomass Production ◽

N Uptake ◽

Biomass Accumulation ◽

Nitrogen Utilization ◽

Cellulosic Biomass ◽

Utilization Efficiency ◽

Cellulose Synthesis ◽

N Utilization ◽

C Metabolism ◽

N Use

Abstract Nitrogen (N) is a macronutrient that boosts carbon (C) metabolism and plant growth leading to biomass accumulation. The molecular connection between nitrogen utilization efficiency (NUE) and biomass production remains unclear. Here, via quantitative trait loci analysis and map-based cloning, we reveal that natural variation at the MYB61 locus leads to differences in N use and cellulose biogenesis between indica and japonica subspecies of rice. MYB61, a transcriptional factor that regulates cellulose synthesis, is directly regulated by a known NUE regulator GROWTH-REGULATING FACTOR4 (GRF4), which coordinates cellulosic biomass production and N utilization. The variation at MYB61 has been selected during indica and japonica domestication. The indica allele of MYB61 displays robust transcription resulting in higher NUE and increased grain yield at reduced N supply than that of japonica. Our study hence unravels how C metabolism is linked to N uptake and may provide an opportunity to reduce N use for sustainable agriculture.

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Impact of industrial-age climate change on the relationship between water uptake and tissue nitrogen in eucalypt seedlings

Functional Plant Biology ◽

10.1071/fp12130 ◽

2013 ◽

Vol 40 (2) ◽

pp. 201 ◽

Cited By ~ 8

Author(s):

Gyro L. Sherwin ◽

Laurel George ◽

Kamali Kannangara ◽

David T. Tissue ◽

Oula Ghannoum

Keyword(s):

High Temperature ◽

Elevated Co2 ◽

Water Use ◽

N Uptake ◽

15N Nmr ◽

Plant Water ◽

Total N ◽

Use Efficiency ◽

Chemical Groups ◽

Tissue Nitrogen

This study explored reductions in tissue nitrogen concentration ([N]) at elevated CO2 concentrations ([CO2]), and changes in plant water and N uptake. Eucalyptus saligna Sm. seedlings were grown under three [CO2] levels (preindustrial (280 μL L–1), current (400 μL L–1) or projected (640 μL L–1)) and two air temperatures (current, (current + 4°C)). Gravimetric water use, leaf gas exchange and tissue dry mass and %N were determined. Solid-state 15N-NMR spectroscopy was used for determining the partitioning of N chemical groups in the dry matter fractions. Water use efficiency (WUE) improved with increasing [CO2] at ambient temperature, but strong leaf area and weak reductions in transpiration rates led to greater water use at elevated [CO2]. High temperature increased plant water use, such that WUE was not significantly stimulated by increasing [CO2] at high temperature. Total N uptake increased with increasing [CO2] but not temperature, less than the increase recorded for plant biomass. Tissue [N] decreased with rising [CO2] and at high temperature, but N use efficiency increased with rising [CO2]. Total N uptake was positively correlated with total water use and root biomass under all treatments. Growth [CO2] and temperature did not affect the partitioning of 15N among the N chemical groups. The reductions of tissue [N] with [CO2] and temperature were generic, not specific to particular N compounds. The results suggest that reductions in tissue [N] are caused by changes in root N uptake by mass flow due to altered transpiration rates at elevated [CO2] and temperature.

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Biochar Application in Combination with Inorganic Nitrogen Improves Maize Grain Yield, Nitrogen Uptake, and Use Efficiency in Temperate Soils

Agronomy ◽

10.3390/agronomy10091241 ◽

2020 ◽

Vol 10 (9) ◽

pp. 1241

Author(s):

Peter Omara ◽

Lawrence Aula ◽

Fikayo B. Oyebiyi ◽

Elizabeth M. Eickhoff ◽

Jonathan Carpenter ◽

...

Keyword(s):

Grain Yield ◽

Sandy Loam ◽

Inorganic Nitrogen ◽

Block Design ◽

N Uptake ◽

Significant Response ◽

Silty Clay ◽

Temperate Soils ◽

Use Efficiency ◽

N Use

Biochar (B) has shown promise in improving crop productivity. However, its interaction with inorganic nitrogen (N) in temperate soils is not well-studied. The objective of this paper was to compare the effect of fertilizer N-biochar-combinations (NBC) and N fertilizer (NF) on maize (Zea mays L.) grain yield, N uptake, and N use efficiency (NUE). Trials were conducted in 2018 and 2019 at Efaw and Lake Carl Blackwell (LCB) in Oklahoma, USA. A randomized complete block design with three replications and ten treatments consisting of 50, 100, and 150 kg N ha−1 and 5, 10, and 15 Mg B ha−1 was used. At LCB, yield, N uptake, and NUE under NBC increased by 25%, 28%, and 46%, respectively compared to NF. At Efaw, yield, N uptake, and NUE decreased under NBC by 5%, 7%, and 19%, respectively, compared to NF. Generally, results showed a significant response to NBC at ≥10 Mg B ha−1. While results were inconsistent across locations, the significant response to NBC was evident at LCB with sandy loam soil but not Efaw with silty clay loam. Biochar application with inorganic N could improve N use and the yield of maize cultivated on sandy soils with poor physical and chemical properties.

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The Role of Gibberellins in Regulation of Nitrogen Uptake and Physiological Traits in Maize Responding to Nitrogen Availability

International Journal of Molecular Sciences ◽

10.3390/ijms21051824 ◽

2020 ◽

Vol 21 (5) ◽

pp. 1824

Author(s):

Yubin Wang ◽

Qingqing Yao ◽

Yushi Zhang ◽

Yuexia Zhang ◽

Jiapeng Xing ◽

...

Keyword(s):

Nitrogen Availability ◽

Physiological Responses ◽

N Uptake ◽

Nitrogen Supply ◽

Rna Seq ◽

Uptake Capacity ◽

Use Efficiency ◽

Low Nitrogen ◽

N Use

Modified gibberellin (GA) signaling leads to semi-dwarfism with low nitrogen (N) use efficiency (NUE) in crops. An understanding of GA-mediated N uptake is essential for the development of crops with improved NUE. The function of GA in modulating N uptake capacity and nitrate (NO3−) transporters (NRTs) was analyzed in the GA synthesis-deficient mutant zmga3ox grown under low (LN) and sufficient (SN) N conditions. LN significantly suppressed the production of GA1, GA3, and GA4, and the zmga3ox plants showed more sensitivity in shoots as well as LN stress. Moreover, the higher anthocyanin accumulation and the decrease of chlorophyll content were also recorded. The net NO3− fluxes and 15N content were decreased in zmga3ox plants under both LN and SN conditions. Exogenous GA3 could restore the NO3− uptake in zmga3ox plants, but uniconazole repressed NO3− uptake. Moreover, the transcript levels of ZmNRT2.1/2.2 were downregulated in zmga3ox plants, while the GA3 application enhanced the expression level. Furthermore, the RNA-seq analyses identified several transcription factors that are involved in the GA-mediated transcriptional operation of NRTs related genes. These findings revealed that GAs influenced N uptake involved in the transcriptional regulation of NRTs and physiological responses in maize responding to nitrogen supply.

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