Guiding fall fertilization of cool‐season turfgrass lawns with verdure tissue‐N tests

Guillard, Karl; Miele, Kevin M.; Sürer, İrfan; Morris, Thomas F.

doi:10.1002/csc2.20406

Cited by 1 publication

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“…N and is a suitable index for in-season crop N deficit monitoring and can potentially be used to quantify the amount of supplemental N fertilization scheduled during crop growth. N and has advantages over other indices such as PNC ( Guillard et al., 2021 ), DM ( Zhu et al., 2003 ), and chlorophyll concentration ( Li et al., 2019 ) as it contains more information on crop growth conditions by integrating PNC with plant dry matter while diagnosing plant N status ( Lemaire et al., 2008 ; Ziadi et al., 2008 ; Ata-Ul-Karim et al., 2017a ).…”

Section: Discussionmentioning

confidence: 99%

In-season assessment of agronomic nitrogen use efficiency and its components in winter wheat using critical nitrogen dilution curve

Ma²,

Zhao³

et al. 2023

Front. Plant Sci.

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Accurate and timely nitrogen (N) scheduling requires knowledge of in-season crop N deficit. Therefore, understanding the association between crop growth and crop N demand during its growth period is imperative for fine-tuning N scheduling decisions to actual crop N demand and to enhance N use efficiency. The concept of the critical N dilution curve has been employed to assess and quantify the intensity and time of crop N deficit. However, research regarding the association between crop N deficit and N use efficiency in wheat is limited. The present study was carried out to determine whether there are relationships between the accumulated nitrogen deficit (Nand) and agronomic N use efficiency (AEN) as well as with its components (N fertilizer recovery efficiency (REN) and N fertilizer physiological efficiency (PEN)) of winter wheat and to explore the potential capacity of Nand for predicting AEN and its components. Data acquired from five variable N rates (0, 75, 150, 225, and 300 kg ha−1) field experiments using six winter wheat cultivars were used to establish and validate the relationships between Nand and AEN, REN, and PEN. The results indicated that plant N concentration in winter wheat was significantly affected by N application rates. Nand varied from −65.73 to 104.37 kg ha−1 after Feekes stage 6 under different N application rates. The AEN and its components were also affected by cultivars, N levels, seasons, and growth stages. A positive correlation was observed between Nand, AEN, and its components. Validation using an independent data set showed the robustness of the newly developed empirical models to accurately predict AEN, REN, and PEN with an RMSE of 3.43 kg kg−1, 4.22%, and 3.67 kg kg−1 and RRMSE of 17.53%, 12.46%, and 13.17%, respectively. This indicates that Nand has the potential to predict AEN and its components during the growth period of winter wheat. The findings will assist in improving in-season N use efficiency by fine-tuning N scheduling decisions in winter wheat cultivation.

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Section: Discussionmentioning

confidence: 99%

In-season assessment of agronomic nitrogen use efficiency and its components in winter wheat using critical nitrogen dilution curve

Ma²,

Zhao³

et al. 2023

Front. Plant Sci.

View full text Add to dashboard Cite

show abstract

Guiding fall fertilization of cool‐season turfgrass lawns with verdure tissue‐N tests

Abstract: This is the author manuscript accepted for publication and has undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as

Cited by 1 publication

References 64 publications

In-season assessment of agronomic nitrogen use efficiency and its components in winter wheat using critical nitrogen dilution curve

In-season assessment of agronomic nitrogen use efficiency and its components in winter wheat using critical nitrogen dilution curve

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