1、Root

To assess the yield of Chinese cabbage, the Chinese cabbage in half of each plot was harvested and weighted. Four plants that exhibited uniform growth height and stage from two adjacent rows to minimize sampling variation were sampled and divided into shoot and root.

2、Mechanistic Insights into Phosphorus Efficiency and Shoot P

In this study, eight Chinese cabbage (Brassica rapa pekinensis) genotypes were grown in a culture room under 0, 25, 50, 100, 150, 300, 600, 900, and 1200 mg kg−1 concentrations of P to evaluate root responses in order to define various adaptive strategies in relation to P acquisition.

3、Root

The findings indicated that the yield of Chinese cabbage significant positive linear increased with P fertilization. P fertilizer application resulted in an increasing concentration and uptake of total P, as well as root length and surface area in the Chinese cabbage.

4、Study on Strategies of Growth and Phosphorus Uptake of Chinese Cabbage

Study on Strategies of Growth and Phosphorus Uptake of Chinese Cabbage at Different Phosphorus Supply Levels. As an essential nutrient element for plant growth, phosphorus (P) plays an important role in plant growth and metabolism.

Shoot and Root Traits are Associated with Varying Soil Phosphorus

In future, P fertilizer management needs to be linked to the P acquisition strategies of Chinese cabbage. Phosphorus (P) availability is a key constraint for crop production under multiple environmental situations (Chen et al. 2018).

Effects of Phosphorus

The highest phosphorus content of the aboveground part of Chinese cabbage was 0.4% under 50% soil conditioner treatment, 42.86% higher than that of phosphorus deficiency treatment, and the phosphorus utilization rate was 26.7%.

Phosphorus application effects and input threshold of Chinese cabbage

Abstract: To resolve the problem of higher application and lower use efficiency of phosphorus fertilizer of Chinese cabbage (Brassica pekinensis), the yield, use efficiency of phosphate fertilizer and soil phosphate balance were examined by a located field trial in Zhangye Observation and Experiment Station of the Agro-ecological Environment in ...

Mechanistic Insights into Phosphorus Efficiency and Shoot P

In this study, eight Chinese cabbage (Brassica rapa pekinensis) genotypes were grown in a culture room under 0, 25, 50, 100, 150, 300, 600, 900, and 1200 mg kg−1 concentrations of P to...

Root

Field experiments were conducted for two consecutive years with five different P application rates (0, 33, 65, 131, and 393 kg P ha −1) to explore strategies for improving P uptake in Chinese cabbage.

Shoot and Root Traits are Associated with Varying Soil Phosphorus

Conclusion: Low P afected the plasticity of root traits of Chinese cabbage.The high-PE inbred lines of Chinese cabbage tend to have stronger root traits in order to acquire more P. Acid phosphatase also acts synergistically with these root traits under LP condi-tion.

When Chinese cabbage (also known as pak choi) suffers from phosphorus deficiency, its growth is inhibited, leaves turn yellow and thin, and spots may even appear. Phosphorus is one of the essential nutrients for plant growth and development, particularly critical for cruciferous vegetables like Chinese cabbage. Below are some methods to resolve phosphorus deficiency in Chinese cabbage:

1. Soil Testing and Analysis

• Prepare Tools: Gather soil sampling tools, such as shovels, trowels, plastic bags, and notebooks.
• Collect Samples: Randomly select healthy plants between rows of Chinese cabbage and gently dig soil near the roots with a trowel.
• Conduct Soil Tests: Bring the soil samples to a laboratory for phosphorus content measurement. If possible, use professional methods like titration or colorimetry for accurate results.
• Analyze Data: Determine whether the soil’s phosphorus levels fall below the normal requirements for Chinese cabbage based on test results.

2. Adjust Fertilization Strategies

• Set Targets: Identify the severity and scope of phosphorus deficiency in Chinese cabbage using soil test results.
• Develop Plans: Create a rational fertilization plan based on the growth stage of Chinese cabbage and soil conditions. For mild deficiencies, use slow-release phosphorus fertilizers; for severe cases, apply fast-acting phosphorus fertilizers.
• Choose Fertilizers: Select appropriate phosphorus fertilizers, such as superphosphate or diammonium phosphate, which release phosphorus quickly to meet short-term needs.
• Timing: Apply fertilizers during peak growth periods, typically in spring when Chinese cabbage thrives.

3. Increase Organic Fertilizer Use

• Sources: Organic fertilizers, such as farm manure or animal compost, are rich in phosphorus and other nutrients.
• Application: Evenly spread organic fertilizers on the soil surface and incorporate them into the soil to promote decomposition and nutrient release.
• Timing: Apply before planting or during the growing season to ensure sustained nutrient supply.

4. Irrigation and Water Management

• Principles: In case of phosphorus deficiency, increase irrigation to maintain moist but well-drained soil. Excessive water can cause root hypoxia and hinder growth.
• Methods: Use drip or sprinkler irrigation to reduce water loss and maintain optimal soil humidity.
• Drainage: Ensure good drainage to prevent root diseases caused by waterlogging.

5. Plant Management

• Pruning: Remove weak or diseased branches to reduce pest risks and improve photosynthesis efficiency.
• Proper Density: Adjust planting density based on soil fertility and growth conditions to avoid poor growth due to insufficient light.
• Resistance: Use biopesticides and plant growth regulators to enhance pest and disease resistance.

6. Soil Improvement

• Humus Addition: Add humus to improve soil water-retention and fertilizer-retention capacity, enhancing soil structure.
• Deep Tilling: Regularly loosen the soil to improve aeration, aiding root respiration and nutrient absorption.
• Crop Rotation: Rotate crops to prevent nutrient depletion and imbalance from continuous monoculture.

7. Monitoring and Adjustment

• Regular Testing: Routinely test soil and plants for phosphorus levels to assess fertilization effectiveness.
• Timely Adjustments: Modify fertilization plans based on test results and plant health.
• Record Keeping: Document fertilization dates, amounts, methods, and outcomes for future reference.

implementing these measures can effectively address phosphorus deficiency in Chinese cabbage, promoting healthy growth. When fertilizing, follow the principle of "small doses, frequent applications" to avoid over-fertilization, soil salinization, and nutrient waste. Additionally, balance other nutrients to ensure overall plant health.