1、Effects of long

Excessive K application will not lead to sustained crop yield growth but may result in resource waste (Zhan et al., 2016). The ratio of different nutrients (e.g., nitrogen and phosphorus) should also be considered for regional fertilization management (Li et al., 2015).

2、The links between potassium availability and soil exchangeable calcium

Our results suggested that lime-induced K uptake by crops was mediated by K +, Ca 2+, and Al 3+, and that lime application resulted in higher soil K availability.

3、Effects of Potassium Levels on Plant Growth, Accumulation and

Due to the one-sided pursuit of high yield and large fruits by fruit farmers, the excessive application of N fertilizer in apple orchards has become common in China.

How Excess Potassium Can Affect Plant Nutrient Uptake

Overapplication of potash fertilizers leads to reduced calcium uptake, causing blossom end rot, a common physiological disorder characterized by dark sunken lesions at the fruit’s blossom end.

Optimizing Potassium Fertilization Combined with Calcium

Alkaline fertilizers demonstrate significant potential in mitigating rice cadmium (Cd) accumulation, yet the combined effects of calcium–magnesium phosphate (CMP) with potassium (K) fertilizer types and split application strategies remain unclear.

Effects of different fertilization practices on maize yield, soil

Our results provide a theoretical basis for fertilizer application and for improving the soil structure for maize cultivation in northern China.

Soil potassium regulation by changes in potassium balance and iron and

Liu et al. (2019) showed that long-term application of fertilizer without K could significantly decrease soil exchangeable K (EK) content and K uptake by crops.

Effect of Phosphorus and Potassium Fertilizers Application on Soil

At Assosa, a field experiment was conducted to determine how soil chemical characteristics and accumulation of phosphorus and potassium in potato tissue responded to phosphorus and potassium fertilizers application.

Chemical Fertilizers and Their Impact on Soil Health

Excess potassium results in the deficiency of calcium in plants; some plants consume Ca, Mg, and K mostly in the percentage they are present in the soil. Excess potassium in the soil is responsible for the loss of soil structure (Anderson 2004).

Effects of Potassium Levels on Plant Growth, Accumulation and

Due to the one-sided pursuit of high yield and large fruits by fruit farmers, the excessive application of N fertilizer in apple orchards has become common in China.

Potassium and calcium fertilizers are two essential plant nutrients that play distinct roles in plant growth. Potassium primarily regulates water metabolism, promotes photosynthesis, and enhances disease resistance; calcium, meanwhile, is critical for root development, stress tolerance, and pest/disease resilience.

Does unutilized potassium absorption cause calcium loss? This question involves complex nutrient uptake, transport, and utilization processes. During plant growth, potassium and calcium absorption interact dynamically. Whether excess potassium leads to calcium depletion depends on multiple factors:

First, nutrient absorption through plant roots is an active, energy-consuming process. When potassium supply is insufficient, plants may prioritize absorbing other nutrients (e.g., nitrogen, phosphorus) to maintain physiological functions. this preference does not necessarily result in calcium loss.

Second, calcium transport and utilization operate relatively independently within plants. While potassium affects calcium dynamics, it does not directly "leak" calcium. Plants adapt to potassium shortages by adjusting nutritional balance—for example, increasing absorption of alternative nutrients or altering growth patterns (e.g., expanding leaves or root systems).

Third, nutrient use efficiency plays a key role. Under potassium limitation, plants may enhance strategies like: increasing chlorophyll content to boost photosynthetic efficiency, accelerating early-season nutrient storage, or modifying growth cycles to optimize resource allocation.

unutilized potassium does not inherently cause calcium loss. Plants employ adaptive mechanisms—including nutritional rebalancing, improved uptake efficiency, and growth habit adjustments—to mitigate potassium deficiencies. Agricultural practices should therefore apply potassium and calcium fertilizers judiciously based on specific crop needs to ensure balanced nutrient supply.