Morphology and Nitrogen Uptake and Distribution of Wheat Plants as Influenced by Applying Remedial Urea Prior to or Post Low-Temperature Stress at Seedling Stage

Li, Chunyan; Liu, Mingmin; Dai, Cunhu; Zhu, Yongfa; Zhu, Min; Ding, Jinfeng; Zhu, Xinkai; Zhou, Guisheng; Guo, Wenshan

doi:10.3390/agronomy12102338

Cited by 3 publications

(2 citation statements)

References 33 publications

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“…Abedi et al [ 52 ] report that both the rate and timing of nitrogen fertilization play crucial roles in enhancing wheat protein content and its quality, alongside high wheat production, thus supporting a strategic rethink in nitrogen application strategies. Additionally, Li et al [ 53 ] demonstrated that applying remedial nitrogen prior to low-temperature stress was more effective in enhancing wheat morphology and nitrogen uptake efficiency compared to post-low-temperature stress applications, highlighting the importance of strategic nitrogen management in varying environmental conditions.…”

Section: Discussionmentioning

confidence: 99%

Integrating NDVI, SPAD, and Canopy Temperature for Strategic Nitrogen and Seeding Rate Management to Enhance Yield, Quality, and Sustainability in Wheat Cultivation

Hnizil,

Baidani,

Khlila

et al. 2024

Plants

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This study explores the interplay between nitrogen doses and seeding rates on wheat yield, biomass, and protein content. Utilizing tools such as the Normalized Difference Vegetation Index (NDVI), Soil Plant Analysis Development (SPAD) measurements, and canopy temperature (CT), we conducted experiments over five growing seasons. The treatments included three nitrogen levels (0, 60, 120 kg/ha) and three seeding rates (300, 400, 500 seeds/m2) in a split-plot design with 90 plots and two replications. Our results show that an intermediate nitrogen dose (60 kg/ha) combined with a moderate seed rate (400 seeds/m2) enhances wheat yield by 22.95%. Reduced nitrogen levels increased protein content, demonstrating wheat’s adaptive mechanisms under nitrogen constraints. NDVI analysis highlighted significant growth during the tillering phase with high nitrogen, emphasizing early-stage nutrient management. SPAD measurements showed that early nitrogen applications boost chlorophyll content, essential for vigorous early growth, while CT data indicate that optimal nitrogen and seed rates can effectively modulate plant stress responses. As crops mature, the predictive capacity of NDVI declines, indicating the need for adjusted nitrogen strategies. Collectively, these findings advocate for refined management of nitrogen and seeding rates, integrating NDVI, SPAD, and CT assessments to enhance yields and promote sustainable agricultural practices while minimizing environmental impacts.

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Section: Discussionmentioning

confidence: 99%

Integrating NDVI, SPAD, and Canopy Temperature for Strategic Nitrogen and Seeding Rate Management to Enhance Yield, Quality, and Sustainability in Wheat Cultivation

Hnizil,

Baidani,

Khlila

et al. 2024

Plants

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show abstract

“…This may be because optimizing phosphorus application increased the phosphorus availability in the soil phosphorus pool, which could meet the nutritional demand for wheat growth and development [18]. It has been shown that the application of additional urea before LT stress at the seedling stage of wheat was conducive to promoting the uptake of fertilizers by the root system, increasing the aboveground dry matter weight, and restoring wheat growth [42].…”

Section: Effects Of Optimizing Phosphorus Application On Dry Matter A...mentioning

confidence: 99%

Twice-Split Phosphorus Application Alleviates Low Temperature Stress by Improving Root Physiology and Phosphorus Accumulation, Translocation, and Partitioning in Wheat

Xu,

Hassan,

2023

Agronomy

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In the context of global warming, low temperature (LT) disasters in major crops are also becoming more common. LT stress in the Huang-Huai-Hai Plain, the central wheat region in China, caused a massive reduction in wheat yields. A step towards ensuring wheat yield stability and food security, this study investigated the effects of optimizing phosphorus application on the root physiology, dry matter phosphorus accumulation, translocation, and partitioning of wheat under LT stress, using the representative cultivar Yannong 19 as the test material. The treatments included conventional phosphorus application (R1) and twice-split phosphorus application (R2), followed by −4 °C LT treatment and normal temperature (NT) treatment during the anther interval stage. Analysis of the root physiology (enzymatic activities and acid phosphatase, contents of malondialdehyde, soluble sugar, and soluble protein), phosphorus and dry matter accumulation, translocation, partitioning, and agronomic and yield-related components was carried during this research study. The results showed that the wheat root activity was significantly reduced and the antioxidant enzyme activities were increased to mitigate the damage of LT stress. Moreover, LT treatments damaged root function. The root activity and antioxidant properties were significantly lower than those of the NT treatment at the flowering stage. The dry matter and phosphorus accumulations were reduced by 30.6~33.6% and 15.1~21.3% at the flowering and maturity stages, resulting in final yield losses of 10.3~13.0%. In contrast, root activity increased by 16.1~27.2% in the twice-split phosphorus application treatments, and the root antioxidant characteristics were higher. As a result, dry matter and phosphorus accumulation increased after twice-split phosphorus application and their translocation to the grains was more; the final yield increased by 5.5~7.3%. Overall, the twice-split phosphorus application enhanced the physiological function of the root system and promoted the accumulation of nutrients and their transport to the grain, and alleviated the yield loss of wheat caused by LT stress.

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Temperature dependence of nitrate uptake kinetics in Triticum aestivum L. and Triticum dicoccon Schrank cultivars

Raimanová,

Wollnerová,

Haberle

et al. 2024

Czech J. Genet. Plant Breed.

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Temperature is a key parameter that influences the uptake and subsequent utilization of nitrogen by plants. Both suboptimal and supraoptimal temperatures can impair nutrient uptake. The close relatives of bread wheat provide a possible source for breeders to increase stress tolerance. The effect of the increasing temperature (5, 10, 15, 20 and 30 °C) on nitrate uptake and metabolism in five modern spring cultivars of bread wheat (Triticum aestivum L.) and two cultivars of emmer wheat (Triticum dicoccon Schrank), was monitored. Wheat plants were grown under controlled conditions in hydroponics. The parameters of Michaelis-Menten kinetics, maximum uptake rate (V max ), the Michaelis constant (K m ) and selected characteristics of nitrate metabolism, the activity of nitrate reductase (NR) and contents of nitrate in leaves were observed. The effect of temperature was significant for all studied traits except K m , while the cultivar factor was significant for V max , K m , NR and root/shoot ratio (R/S). Emmer wheat cultivar Rudico had significantly higher V max at 5, 15, 20 and 30 °C than all bread wheat cultivars, on average 7.07, in comparison with 4. 09-4.43 μmol NO 3 -/g FW/h in bread wheat cultivars. Emmer wheat Rudico and Tapiruz had significantly higher K m (on average, 41.59 and 47.22 μM NO 3 -) than bread wheat cultivars (27.59-33.44 μM NO 3 -). Differences in the studied kinetic parameters of nitrate uptake offer the possibility of using T. dicoccon genotypes in breeding for better nitrogen use efficiency.

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Morphology and Nitrogen Uptake and Distribution of Wheat Plants as Influenced by Applying Remedial Urea Prior to or Post Low-Temperature Stress at Seedling Stage

Cited by 3 publications

References 33 publications

Integrating NDVI, SPAD, and Canopy Temperature for Strategic Nitrogen and Seeding Rate Management to Enhance Yield, Quality, and Sustainability in Wheat Cultivation

Integrating NDVI, SPAD, and Canopy Temperature for Strategic Nitrogen and Seeding Rate Management to Enhance Yield, Quality, and Sustainability in Wheat Cultivation

Twice-Split Phosphorus Application Alleviates Low Temperature Stress by Improving Root Physiology and Phosphorus Accumulation, Translocation, and Partitioning in Wheat

Temperature dependence of nitrate uptake kinetics in Triticum aestivum L. and Triticum dicoccon Schrank cultivars

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