1、Nitrogen redistribution during the grain

Our study demonstrates that the remobilization of nitrogen from vegetative parts to grains initiates leaf senescence and is closely correlated with the expression of autophagy-related genes.

2、Timing of nitrogen fertilization and shading affect the transition of

Leaf senescence in wheat is physiologically important if the filling grains are to gain access to the minerals stored in the leaves and culms. On the other hand, too early leaf senescence can lead to yield reduction due to insufficient carbon assimilation for grain filling.

3、Foliar Nitrogen Application Enhances Nitrogen Assimilation and

In response to foliar urea application, wheat plants rapidly modulate their nitrogen metabolism to efficiently assimilate and redistribute nitrogen within the plant. Several key genes involved in nitrogen uptake, assimilation, and remobilization are upregulated in response to foliar urea.

4、Effects of water and fertilizer coupling on photosynthetic performance

The results of this experiment indicated that the chlorophyll content of wheat increased and then decreased within 28 days after anthesis, due to the decrease in photosynthetic rate caused by the decrease in chlorophyll content when wheat reached maturity.

Foliar applications of various nitrogen (N) forms to winter wheat

Foliar nitrogen (N) application is an effective strategy to improve protein content and quality in wheat kernels, but the specific effects of N forms remain unclear.

Growth, Photosynthesis and Yield Responses of Common Wheat to Foliar

Current agriculture intensifies crop cultivation to meet food demand, leading to unsustainable use of chemical fertilizers. This study investigates a few physiological and agronomic responses of common wheat following the inoculation with plant growth-promoting bacteria to reduce nitrogen inputs.

Timing of nitrogen fertilization and shading affect the transition of

The grain yield and protein content of wheat is influenced by the transition of nitrogen metabolism in senescing leaves from pre-anthesis to maturity.

Timing of nitrogen fertilization and shading affect the transition of

Leaf senescence in wheat is physiologically important if the filling grains are to gain access to the minerals stored in the leaves and culms. On the other hand, too early leaf senescence can lead to yield reduction due to insufi-cient carbon assimilation for grain filling.

Leaf senescence of winter wheat and spring wheat as influenced by

The analysis of variance showed that growth stage and fertilization had significant (P ≤ 0.01) effect on leaf senescence of both spring wheat and winter wheat, whereas tillage significantly influenced senescence indicators only in winter wheat.

Impact of nitrogen on photosynthesis, remobilization, yield, and

The adverse effects of drought on winter wheat plants may be aggravated by heat stress. Therefore, effective mitigation measures to alleviate the negative impacts of postanthesis heat and drought stress on winter wheat are urgently needed.

The phenomenon of wheat leaves turning green shortly after foliar fertilization typically refers to rapid color changes in the leaves following the application of leaf-applied nutrients. This process may be influenced by multiple factors, which are explained in detail below:

I. Composition of Foliar Fertilizer and Wheat’s Absorption Mechanism

1. Fertilizer Components: Foliar fertilizers often contain essential microelements and nutrients, such as nitrogen (N), phosphorus (P), potassium (K), and trace elements like iron (Fe) and zinc (Zn). These components are critical for promoting wheat growth and development.
2. Absorption Mechanism: Wheat absorbs water and nutrients from the soil through its roots, transporting them via the stem to the leaves. Foliar fertilization, delivers nutrients directly to the leaves, improving nutrient utilization efficiency.
3. Rapid Response: Because foliar fertilization bypasses root absorption, nutrients can quickly reach the leaves, leading to visible changes in leaf color, such as a more vibrant green hue, within a short period.

II. Mechanisms of Foliar Fertilizer Action

1. Nutrient Supplementation: Foliar fertilizers directly provide essential nutrients (e.g., N, P, K) required for plant growth, helping wheat recover vigor.
2. Physiological Regulation: Certain components in foliar fertilizers regulate plant physiological activities, such as enhancing stress resistance and promoting photosynthesis, which support healthy wheat growth.
3. Quality Improvement: Foliar fertilization can also improve wheat quality, including increased yield and protein content, thereby boosting farmers’ income.

III. Factors Affecting Leaf Greening

1. Fertilizer Concentration: Overly high or low concentrations of foliar fertilizer may cause leaf greening. Optimal concentration ranges ensure proper absorption and utilization.
2. Application Methods: Improper application techniques (e.g., uneven spraying) can influence leaf color changes. Correct methods maximize fertilizer efficiency and reduce environmental pollution.
3. Environmental Conditions: Temperature, humidity, and other environmental factors affect fertilizer effectiveness. For example, high temperatures or humidity may accelerate fertilizer decomposition or evaporation.

IV. How to Avoid Excessive Leaf Greening

1. Select Appropriate Fertilizers: Choose foliar fertilizers tailored to wheat’s growth needs. Farmers should consider local climate, soil conditions, and opt for reputable brands.
2. Control Dosage: Adjust fertilizer amounts based on wheat growth stages and soil conditions. Excessive use may trigger leaf greening.
3. Scientific Application: Use proper techniques, such as even spraying and avoiding direct sunlight, to enhance efficiency and minimize environmental impact.

The rapid greening of wheat leaves after foliar fertilization is a complex process influenced by fertilizer composition, absorption mechanisms, environmental factors, and application methods. To optimize results and prevent excessive leaf greening, farmers should select suitable fertilizers, control dosages, and apply scientifically while considering local climatic and soil conditions. This ensures efficient nutrient uptake and supports wheat’s growth requirements.