1、Effects of Different Potassium (K) Fertilizer Rates on Yield Formation

As one of the most important nutrients for plants, potassium (K) has substantial effects on growth and development of crops. Present study was conducted in three different sites in South China in late season in 2019 with the objective to study the effects of different applied amounts of K fertilizer on yield formation and lodging of rice.

2、Effect of potassium rates on rice yields and potassium application

Effects of potassium fertilizer application on rice yield, K content in plant, K uptake, K|fertilizer use efficiency, potassium balance and economic benefit were studied by using a five|year (2008-2012) located experiment in double|rice cropping system.

3、Enhancing Rice Production by Potassium Management: Recommended

Potassium, as one of the most major macronutrients, is involved in a series of plant physiological and biochemical processes, the driving of plant development, enhancement of defense, stomatal regulation and signal transduction, and is, therefore, vital for producing high-yield and high-quality rice [16, 17].

4、(PDF) Potassium nutrition in rice: A review

Potassium (K) is the most neglected nutrient in Indian agriculture and accounts only 10% of the total fertilizer use. The increased cropping intensity and use of high yielding cultivars since...

Effects of different phosphorus and potassium supply on the root

In conclusion, HPHK can improve plant configuration, increase plant P and K absorption and root activity, and increase rice yield and related P and K utilization efficiency.

Potassium Fertilizer Management on Rice Cultivation

The purpose of the present study was to evaluate the effect of potassium on growth and yield of rice and to find out the best suited scheme/timing of potassium fertilizer application for rice crop.

Optimizing rice yield, quality and nutrient use efficiency through

Reasonable nitrogen (N) and potassium (K) application rates can effectively improve fertilizer use efficiency, rice yield and quality.

Achieving sustainable rice production through nitrogen

This study highlights the beneficial effects of a combined nitrogen-potassium approach on various aspects of hybrid rice productivity, including grain yield, total nitrogen and potassium uptake, fertilizer use efficiency, greenhouse gas emissions, and net ecosystem economic benefits.

Effects of potassium fertilization on grain yield, taste quality, and

Results: Compared with a no-potassium treatment (K 0), K fertilization increased the grain yield significantly: by 57.29% for Xiadao No. 1 and 33.51% for Shenliangyou 5814. It did this mainly by increasing the number of rice spikelets per panicle and improving the seed-setting rate.

Increased rate of potassium fertilizer at the time of heading enhances

Potassium (K) is not easily assimilated into organic matter but helps to improve rice quality. Paddy yield and its quality depend on the correct time of fertilization and harvesting (days after flowering) in the field.

Potassium fertilization offers numerous advantages in rice production. As an essential nutrient for plants, potassium plays a critical role in growth and development. Proper application of potassium fertilizers in rice farming can significantly boost yields, improve grain quality, and enhance stress resistance. The following sections detail the key benefits:

1. Promotes Root System Development Potassium stimulates root growth, leading to a more robust and extensive root system. Enhanced roots improve the plant’s ability to absorb water and nutrients from the soil, which in turn increases photosynthetic efficiency and contributes to higher yields.

2. Improves Disease Resistance Potassium strengthens the plant’s immune response by activating enzymes that combat pests and diseases. It also promotes lignification of cell walls, reducing the risk of lodging (collapse). Thus, proper potassium use reduces disease incidence and enhances overall stress tolerance.

3. Facilitates Protein Synthesis Potassium is vital for protein formation in rice. Adequate potassium supply optimizes protein synthesis, supporting healthy growth and development.

4. Enhances Grain Quality Potassium improves starch accumulation in grains, resulting in plump, high-quality rice with better texture. Additionally, it boosts the synthesis of vitamins (e.g., vitamin C and B-complex) in grains, increasing nutritional value.

5. Delays Leaf Senescence Potassium maintains chlorophyll stability, preventing its breakdown and prolonging leaf health. This delays aging, allows longer nutrient transport, and extends the productive growth phase, ultimately improving yields.

6. Boosts Drought Resistance Potassium enhances drought tolerance by regulating osmotic pressure within cells, reducing water loss. It also improves root water uptake efficiency, enabling rice to thrive in dry conditions.

7. Supports Flower Bud Differentiation Potassium balances hormone levels, promoting effective flower bud formation. Proper application increases spikelet numbers and fertilization rates.

8. Encourages Larger Panicles and Heavier Grains Potassium promotes panicle elongation and thickness, leading to fuller heads. It also enhances grain filling, increasing grain weight and overall yield.

9. Optimizes Photosynthesis Potassium boosts chlorophyll content and photosynthetic pigment efficiency. By improving CO₂ fixation, it maximizes photosynthate production, directly contributing to higher yields.

10. Increases Fertilizer Use Efficiency When combined with nitrogen and phosphorus fertilizers, potassium forms complexes that reduce nutrient loss. This synergy lowers chemical input requirements, conserving resources and minimizing environmental impact.

Potassium fertilization is indispensable for rice production. It not only elevates yields and grain quality but also strengthens disease resistance, drought tolerance, reproductive capacity, and resource use efficiency. Farmers should adopt scientific potassium management practices to meet the crop’s nutritional needs and achieve sustainable productivity.