1、Water

Here, an experiment was set up to clarify how water-potassium coupling at different growth stages affects kiwifruit yield, water/potassium productivity and quality.

2、Effects of different sources of potassium fertiliser on yield, fruit

To determine the optimal potassium fertiliser for kiwifruit, this study investigated the effects of different potassium sources on kiwifruit yield and postharvest quality as well as plant and soil nutrient contents in an orchard in Shaanxi Province, Northwest China.

3、Optimal Potassium Fertilizer Application Rate per Mu for Kiwifruit

Here, an experiment was set up to clarify how water-potassium coupling at different growth stages affects kiwifruit yield, water/potassium productivity and quality.

Water

Here, an experiment was set up to clarify how water-potassium coupling at different growth stages affects kiwifruit yield, water/potassium productivity and quality.

Effect of nitrogen and potassium fertilization on fruit yield and

In this research, increasing doses of nitrogen (8-16-24-32 kg N da-1) and potassium (0-8-16-24-32-40 kg K2O da-1) fertilizers were applied to Hayward kiwifruit (Actinidia deliciosa) to...

Effects of di erent sources of potassium fertiliser

Abstract: Potassium plays an important role in improving crop growth, yield, and quality; however, choosing the right potassium fertiliser remains challenging. To determine the optimal potassium fertiliser for kiwifruit, this study investi-gated the effects of di erent potassium sources on kiwifruit

Effects of water and fertilizer deficit regulation with drip irrigation

Therefore, the effects of water and fertilizer deficit regulation with drip irrigation (WFDR DI) on the quality of kiwifruit at different growth stages were explored to achieve water and fertilizer saving, and green and efficient production of kiwifruit.

OPTIONS FOR SUPPLYING POTASSIUM TO KIWIFRUIT VINES

In supplying the 250 kg of potassium required by a productive hectare of kiwifruit, there are several options available in the form and timing of fertiliser applications. In this paper, soil and leaf analysis are emphasised in interpreting field trials using different means of supplying potassium.

Effects of different sources of potassium fertiliser on yield, fruit

To determine the optimal potassium fertiliser for kiwifruit, this study investigated the effects of different potassium sources on kiwifruit yield and postharvest quality as well as plant and soil nutrient contents in an orchard in Shaanxi Province, Northwest China.

Effects of irrigation and fertilization management on kiwifruit yield

In summary, scientific and reasonable water and fertilizer management can significantly improve the yield and quality of kiwifruit, optimize WUE, and reduce water and fertilizer waste, providing theoretical basis and practical guidance for sustainable agricultural development.

Kiwifruit (Actinidia chinensis) is a highly nutritious fruit rich in vitamin C, dietary fiber, microelements, and antioxidants. Potassium plays a critical role in the synthesis and transport of these nutrients, significantly affecting fruit quality and taste. rational potassium fertilization is essential for promoting kiwifruit growth and enhancing fruit quality.

I. Potassium Management at Different Growth Stages

1. Early Stage (Budding to Flowering)

During the budding and flowering stage, kiwifruit plants undergo rapid growth, making potassium application particularly important. Proper fertilization during this period promotes root development and nutrient uptake, laying a solid foundation for subsequent growth.

• Topdressing: Apply the first topdressing shortly after budding to stimulate rapid growth. Use potassium-rich compound fertilizers or organic fertilizers (e.g., well-decomposed cow or chicken manure). The dosage depends on tree age, vigor, and soil fertility, typically 20–30 kg of compound fertilizer per mu (approx. 0.067 hectares).
• Irrigation: Maintain soil moisture to prevent water stress and support root development.

2. Middle Stage (Flowering to Fruit Set)

During flowering and early fruiting, potassium application should prioritize balance and moderation.

• Topdressing: Continue moderate topdressing with balanced compound fertilizers containing moderate potassium (30–40 kg per mu). Avoid overapplication to prevent nutrient excess or burn.
• Irrigation: Ensure consistent soil moisture without overwatering, which can cause root hypoxia.

3. Late Stage (Fruit Maturation)

During fruit maturation, apply potassium cautiously to avoid over-ripening or rot.

• Topdressing: Apply a final topdressing one month before harvest, focusing on nutrient supplementation rather than high potassium levels (15–20 kg of compound fertilizer per mu).
• Irrigation: Maintain soil moisture but avoid excessive irrigation to preserve fruit quality.

II. Types and Application Methods of Potassium Fertilizers

1. Common Potassium Fertilizers:

   • Sulfate of potash (widely used due to moderate cost and high absorbability).
   • Muriate of potash (KCl) and nitrate of potash (KNO₃).

2. Application Methods:

   • Ditch Application: Spread fertilizer evenly in ditches under the tree canopy, then cover with soil. Suitable for large orchards.
   • Hole Application: Dig small holes around roots, apply fertilizer, and cover. Best for young or shallow-rooted trees.
   • Foliar Spraying: Spray potassium solutions onto leaves using a fogger. Ideal for seedlings or slow-growing plants.

III. Key Considerations

1. Soil Testing: Analyze soil potassium content and pH before fertilization to determine precise needs.
2. Avoid Overapplication: Excess potassium can lead to over-ripening, reduced quality, or disease risks. Control dosage and frequency strictly.
3. Timely Application: Adjust potassium use based on growth stages and soil conditions.
4. Balanced Nutrients: Combine potassium with other essential elements (N, P, Ca) for balanced fertilization.

By following these guidelines, kiwifruit growers can optimize potassium management to improve fruit quality and yield.