Excessive Nitrogen Application Leads to Lower Rice Yield and Grain Quality by Inhibiting the Grain Filling of Inferior Grains

Zhao, Can; Chen, Yue; Jiang, Yan; Shi, Yi; Zhao, Lingtian; Liao, Pingqiang; Wang, Weiling; Xu, Ke; Dai, Qigen; ZhongYang, Huo

doi:10.3390/agriculture12070962

Cited by 34 publications

(17 citation statements)

References 41 publications

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“…We observed in our field trials that over‐expression of Nhd1 altered heading date but not mature time at the same N condition, implying the different grain filling period of Nhd1 over‐expression lines and WT (Figure 1). Limited N supply can promote filling rate but reduce its stage duration which in turn deteriorate grain quality with high AC (Zhang et al ., 2021b; Zhao et al ., 2022). Indeed, we detected the similar results in WT (Figures 1e and 4a).…”

Section: Discussionmentioning

confidence: 99%

Improving rice eating and cooking quality by enhancing endogenous expression of a nitrogen‐dependent floral regulator

Zhang,

Zhang

et al. 2023

Plant Biotechnology Journal

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SummaryImproving rice eating and cooking quality (ECQ) is one of the primary tasks in rice production to meet the rising demands of consumers. However, improving grain ECQ without compromising yield faces a great challenge under varied nitrogen (N) supplies. Here, we report the approach to upgrade rice ECQ by native promoter‐controlled high expression of a key N‐dependent floral and circadian clock regulator Nhd1. The amplification of endogenous Nhd1 abundance alters rice heading date but does not affect the entire length of growth duration, N use efficiency and grain yield under both low and sufficient N conditions. Enhanced expression of Nhd1 reduces amylose content, pasting temperature and protein content while increasing gel consistence in grains. Metabolome and transcriptome analyses revealed that increased expression of Nhd1 mainly regulates the metabolism of carbohydrates and amino acids in the grain filling stage. Moreover, expression level of Nhd1 shows a positive relationship with grain ECQ in some local main cultivars. Thus, intensifying endogenous abundance of Nhd1 is a promising strategy to upgrade grain ECQ in rice production.

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Section: Discussionmentioning

confidence: 99%

Improving rice eating and cooking quality by enhancing endogenous expression of a nitrogen‐dependent floral regulator

Zhang,

Zhang

et al. 2023

Plant Biotechnology Journal

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“…However, N supply was found up to 0.3 or 0.375 g kg -1 soil, and the FW, DW accumulation rate, and N uptake rate did not increase with increasing N application. Increasing N application decreases the N contents at a certain point and causes a decline in the yields of horticultural crops ( Zhao et al., 2022 ).…”

Section: Discussionmentioning

confidence: 99%

Study on nitrogen demand model in pakchoi (Brassica campestris ssp. Chinensis L.) based on nitrogen contents and phenotypic characteristics

Chang

Xiong²,

Hameed³

et al. 2023

Front. Plant Sci.

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IntroductionIn precision agriculture, the diagnosis of the nitrogen (N) nutrition status based on the plant phenotype, combined effects of soil types, various agricultural practices, and environmental factors which are essential for plant N accumulation. It helps to assess the N supply for plants at the right time and optimal amount to ensure high N use efficiency thereby reducing the N fertilizer applications to minimize environmental pollution. For this purpose, three different experiments were performed.MethodsA critical N content (Nc) model was constructed based on cumulative photothermal effect (LTF), Napplications, and cultivation systems on yield and N uptake in pakchoi.Results and discussionAccording to the model, aboveground dry biomass (DW) accumulation was found equal or below to 1.5 t/ha, and the Nc value was observed at a constant of 4.78%. However, when DW accumulation exceeded 1.5 t/ha, Nc declined with the increase in DW accumulation, and the relationship between Nc and DW accumulation developed with the function Nc %=4.78 x DW-0.33. An N demand model was established based on the multi-information fusion method, which integrated multiple factors, including Nc, phenotypical indexes, temperature during the growth period, photosynthetically active radiation, and N applications. Furthermore, the model’s accuracy was verified, and the predicted N contents were found consistent with the measured values (R2 = 0.948 and RMSE = 1.96 mg/plant). At the same time, an N demand model based on N use efficiency was proposed.ConclusionsThis study can provide theoretical and technical support for precise N management in pakchoi production.

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“…After that, it sharply decreased. It indicates that excess N reduced rice fertility, which ultimately negativelyimpacted achieving higherrice yields (Zhao et al, 2022). It was found that 90 kg N ha -1 (100% recommended rate) treatment had 80% higher grain production over control.…”

Section: Growth and Yield Attributing Charactersmentioning

confidence: 99%

Requirement and use efficiency of nitrogen in transplanted Aman rice at Ganges tidal water flooded coastal ecosystem

Pranto,

Haque,

Hoque

2023

J Bangladesh Acad Sci

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Transplanted (T) Aman rice covers most of the arable land in the south coastal region of Bangladesh, where nitrogen fertilizer requirement in the Ganges tidal water flooded ecosystem yet not determined. The on-farm experiment was conducted at Dumki Upazila, Patuakhali district of Bangladesh, during T. Aman rice season 2020. The three replicated randomized complete block design was used in the experiment. There were eight treatments with different rates of nitrogen, e.g., control (no nitrogen fertilizer), 18, 36, 54, 72, 90, 108, and 126 kg N ha-1, which was equivalent to 0, 20, 40, 60, 80, 100, 120 and 140% of the current recommended rate, respectively. The test variety of rice was BR23. An increase in nitrogen rates progressively increased the grain yield of rice. The highest yield of 5.04 t ha-1 was found in 54 kg N ha-1 rate. However, using a quadratic equation, the most optimum rate was 75 kg N ha-1, 17% lower than the current recommendation. Nitrogen amendment could increase T. Aman rice grain yield by only 35% over control under tidal water flooded conditions. The agronomic efficiency, recovery efficiency, and physiological efficiency of nitrogen were higher in lower rates of N and gradually decreased with the increase of the rate of N application. The present study recommends 75 kg N ha-1 for cultivating T. Aman rice (BR23) in tidal water flooded the south coastal ecosystem of Bangladesh. J. Bangladesh Acad. Sci. 47(2); 169-180: December 2023

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Excessive Nitrogen Application Leads to Lower Rice Yield and Grain Quality by Inhibiting the Grain Filling of Inferior Grains

Cited by 34 publications

References 41 publications

Improving rice eating and cooking quality by enhancing endogenous expression of a nitrogen‐dependent floral regulator

Improving rice eating and cooking quality by enhancing endogenous expression of a nitrogen‐dependent floral regulator

Study on nitrogen demand model in pakchoi (Brassica campestris ssp. Chinensis L.) based on nitrogen contents and phenotypic characteristics

Requirement and use efficiency of nitrogen in transplanted Aman rice at Ganges tidal water flooded coastal ecosystem

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