1、Phosphorus uptake and rhizosphere properties of alfalfa in response to

Introduction: Phosphorus (P) fertilizer is critical to maintain a high yield and quality of alfalfa (Medicago sativa L.). There are several fertilizer types and soil types in China, and the application of a single type of P fertilizer may not be suitable for present-day alfalfa production.

2、External phosphorus enhances the efficient acquisition of phosphorus by

Root morphological characteristics and rhizosphere carboxylates are the critical factors for phosphorus (P) absorption in forage crops such as alfalfa (Medicago sativa L.) include root morphological characteristics and rhizosphere carboxylates.

3、Optimizing Phosphorus Fertilization Management Is Conducive to

In Xinjiang, in regions with an annual mean temperature of 6–8 °C and an establishment duration of 3 years, phosphorus fertilization improved alfalfa quality. This study provides references for enhancing alfalfa productivity and efficient utilization of phosphorus nutrition.

4、Phosphorus fertilization enhanced overwintering, root system and forage

Regression and path analysis indicated that alfalfa forage yield is primarily affected by mass per shoot rather than shoots per square meter. This study recommended that the sowing of alfalfa...

Phosphorus uptake and rhizosphere properties of alfalfa in

We conducted a greenhouse pot experiment, calcium superphosphate (SSP), diammonium phosphate (DAP), ammonium polyphosphate (APP), potassium dihydrogen phosphate (KP), and no-fertilizer control treatments were applied to alfalfa in sandy and saline-alkali soils.

Phosphorus and Potassium Fertilization of Alfalfa

Fertilizing alfalfa with phosphorus (P) and potassium (K) can increase yield and stand longevity. However, to maximize production and profitability, it is important to adjust fertilizer rates to meet the specific nutritional needs of plants in each field.

Mechanisms of increasing alfalfa growth and phosphorus uptake by

Phosphorus (P) is easily adsorbed and fixed by soil, resulting in low P availability in soil. This research investigated the interactive effects of AMF and low levels of P fertilizer on alfalfa growth and P-uptake to identify optimal methods for increasing P efficiency in alkaline soil.

Phosphorus uptake and rhizosphere properties of alfalfa in response to

Phosphorus (P) fertilizer is critical to maintain a high yield and quality of alfalfa (Medicago sativa L.). There are several fertilizer types and soil types in China, and the application of a single type of P fertilizer may not be suitable for present-day alfalfa production.

Phosphorus uptake and rhizosphere properties of alfalfa

fertilizer type for improving P utilization efficiency. We conducted a greenhouse pot experiment, calcium superphosphate (SSP), diammonium phosphate (DAP), ammonium polyphosphate (APP), potassium dihydrogen phosphate (KP), and no-fertilizer control treatments w

Unveiling the impact of phosphorus availability on growth, root

Alfalfa secretes oxalate to improve P acquisition in acidic soils. The cultivation of alfalfa (Medicago sativa L.) in acidic soils in southern China poses significant challenges, primarily due to two key factors present in soils at low pH: phosphorus (P) deficiency and aluminum (Al) toxicity.

Alfalfa (Medicago sativa) is a widely cultivated herbaceous plant valued for its high protein content, nutritional value, and soil-improving capabilities. In agricultural production, rational phosphorus fertilization is critical to enhancing alfalfa yield and quality. The following outlines key requirements for alfalfa’s phosphorus absorption:

1. Soil Conditions

(1) Soil pH

Alfalfa thrives in neutral or slightly alkaline soils (pH 6.5–7.5) and should avoid acidic or strongly acidic conditions.

(2) Soil Texture

Alfalfa requires well-aerated soils. Opt for sandy loam or loamy soils with good drainage and loose structure.

(3) Soil Nutrients

Balanced supplies of nitrogen (N), phosphorus (P), and potassium (K) are essential. Phosphorus levels should match those of nitrogen and potassium to support optimal growth.

2. Fertilization Timing

(1) Base Fertilization

Apply organic fertilizers (e.g., compost, green manure) as base fertilizer before planting to improve soil structure and provide essential nutrients.

(2) Topdressing

Apply phosphorus fertilizer based on growth stages and soil conditions:

• Early growth stage (1–2 months after planting): Apply once to meet phosphorus demands.
• Flowering and seed maturation: Increase phosphorus doses to promote flowering and seed development.

3. Fertilization Methods

(1) Deep Placement

Distribute phosphorus evenly at deeper soil layers to enhance efficiency.

(2) Blended Application

Combine phosphorus with other fertilizers (e.g., nitrogen, potassium) to balance nutrient ratios and support overall growth.

(3) Foliar Spraying

For drought-resistant or low-phosphorus-demand alfalfa varieties, supplement with foliar phosphorus sprays.

4. Fertilization Rates

(1) Dosage

Base rates on soil tests and alfalfa growth: Typically, apply 10–20 kg/mu of diammonium phosphate (DAP).

(2) Avoid Overapplication

Excessive fertilization leads to nutrient runoff and environmental pollution.

5. Fertilization Timing

(1) Rainy Season Avoidance

Do not apply phosphorus during rainy periods, as rainfall reduces fertilizer efficacy.

(2) Sunny Days

Choose clear, dry weather for fertilization to ensure effective absorption.

6. Fertilization Monitoring

(1) Soil Testing

Regularly monitor soil phosphorus levels to evaluate fertilization effectiveness.

(2) Adjustment

Tailor fertilization plans based on soil test results and alfalfa growth performance.

Alfalfa’s phosphorus absorption depends on integrated factors, including soil conditions, timing, methods, rates, and environmental considerations. Holistic management ensures adequate phosphorus supply, driving high-quality and high-yield alfalfa production.