1、Potassium management in potato production in Northwest region of China

There is great potential to improve both yield and quality of potato to a great extent with balanced use of N, P and K. However, farmers did not know how much K should be applied due to lack of scientific information and method for K recommendations.

2、Nitrogen and potassium fertilization of potatoes: Yield and specific gravity

Abstract Potassium and N fertilization is often required for maximum potato (Solanum tuberosum L.) production. Nitrogen, K, and K-sources (KCl, K 2 SO 4 are known to affect yield and quality of potatoes but N and K interactions as affected by K-source have not been defined.

3、Improving nutrient

In general, optimal N management has had the most important impact on tuber yield and quality compared with the other essential elements. Best management practices for N fertilization include appropriate selection of rate, source, timing, and method of application.

4、1994) 417 NITROGEN AND POTASSIUM FERTILIZATION OF POTATOES: YIELD AND SPECIFIC GRAVITY' D. T. Westermann, T. A. Tindall, D. W. James, and R. L. Hurst'

Tindall, D. W. James, and R. L. Hurst' Abstract Potassium and N fertilization is often required for maximum potato (Solanum tuberosum L.) production. Nitrogen, K. and K-sources (KC1, K 2SO4) are known to affect yield and quality of potatoes but N and K interactions as affected by K-source have not been defin.

The potassium paradox: Implications for soil fertility, crop production and human health

Intensive fertilizer usage of KCl has been inculcated as a prerequisite for maximizing crop yield and quality, and relies on a soil test for exchangeable K in the plow layer to ensure that soil productivity will not be limited by nutrient depletion.

Potato Productivity Response to Potassium Fertilizer Source and Rate in Oregon’s Columbia Basin

Potatoes require high potassium (K) fertilization for good yields, especially in Oregon’s Columbia Basin, but little is known about how K rate and source affect potatoes. This study aimed to evaluate the effects of different K fertilizer rates and sources on the yield and quality of various potato cultivars. Two-year trials (2020 and 2022) were conducted as a split-plot, randomized complete ...

Water use efficiency of potato (Solanum tuberosum L.) under different irrigation methods and potassium fertilizer rates

Abstract This study was conducted to determine the effect of different irrigation methods and potassium fertilizers on potato yield in the Abu–Graib–Baghdad, Iraq Region, during season 2011–2012. Potato was grown under furrow and drip irrigation methods and three potassium fertilizers rates applied with 0.0, 300 and 600 kg K 2 SO 4 ha −1.

Comparative study of potassium rates and sources on potato yield and quality in Florida

Sandy soils are prone to potassium (K) leaching; therefore, developing guidelines for the optimum K application rate and fertilizer source is necessary. This research aimed to evaluate the optimum K fertilizer rates and identify the best K fertilizer sources for potato production, considering the impacts of insufficient or excessive fertilization on potato yield and tuber quality.

A rapid tissue testing methodology for optimum potassium fertilization of potato grown under subtropical short

The sixteen treatments consisted of all combinations of four levels of K applied as basal at planting and as side dressing at the time of earthing-up (30 days after planting (DAP) in two potato cultivars, Kufri Jyoti and Kufri Chandramukhi.

Assessing Potassium Fertilizer Sources, rates and patterns for Potatoes Impacts on Growth, Yield, and Quality

Therefore, the determination of optimum K rate and efficient source for potato is necessary because K affects crop physiological processes, dry matter production, cooking, and processing requirements.

Potato (Solanum tuberosum) is a critical crop whose yield and quality are influenced by various factors, with soil nutrient availability being a key component. Potassium, an essential plant nutrient, significantly impacts potato growth, development, and productivity. Selecting the appropriate timing for potassium fertilization is crucial to maximizing its efficiency. Below are recommendations for optimal potassium application timing:

1. Early Growth Stage (Germination and Seedling Phase)

• Fertilization Time: Apply within 7–10 days after sowing, when plants have just germinated and roots are shallow. Use low-potassium fertilizers like potassium sulfate (K₂SO₄) or potassium nitrate (KNO₃) to promote rapid seedling establishment.
• Application Method: Spread fertilizer evenly over the soil surface, followed by light tillage to incorporate it. Avoid placing fertilizer directly near roots to prevent seedling damage.
• Key Considerations: Excessive potassium at this stage may lead to excessive vegetative growth, hindering later tuber development. Follow the principle of “small amounts, multiple applications” and adjust dosages based on soil tests and crop observations.

2. Mid-Growth Stage (Flowering and Tuber Formation)

• Fertilization Time: Apply after flowering but before tuber initiation, when the plant requires balanced nitrogen (N), phosphorus (P), and potassium (K) nutrients. Use moderate-potassium fertilizers like potassium dihydrogen phosphate (KH₂PO₄) to support reproductive growth and tuber development.
• Application Method: Apply in the evening or morning to reduce sunlight exposure. Broadcast fertilizer around plants and deep-till to integrate it into the soil.
• Key Considerations: Soil potassium levels decline during tuber formation. Increase potassium doses slightly to promote tuber expansion, but avoid overapplication, which may delay maturity.

3. Late Growth Stage (Pre-Harvest)

• Fertilization Time: Apply high-potassium fertilizers (e.g., K₂SO₄) approximately one month before harvest, when plants enter maturity. This boosts starch accumulation and senescence.
• Application Method: Apply in the morning or evening, spreading fertilizer around plants and deep-tilling to ensure absorption.
• Key Considerations: Cease fertilization one month prior to harvest to enhance tuber quality. Excessive potassium at this stage may disrupt soil nutrient balance.

Timing for potassium application in potato cultivation depends on growth stages and soil conditions. Emphasize balanced N-P-K supply during early and mid-stages, then increase potassium during late stages to improve senescence and quality. Avoid overapplication to prevent delayed maturity or soil imbalances. Strategic fertilization practices can significantly boost potato yields and quality, benefiting agricultural productivity.