The study looked at how two plant bioregulators, prohexadione calcium and chlormequat chloride, affected the growth, yield, and quality of pear trees. They found that prohexadione calcium at 400 ppm was the most effective in reducing shoot number and internodal length, while also increasing fruit number, size, sweetness, firmness, and sugar content. This treatment significantly improved fruit yield by about 35%. Similarly, higher doses of chlormequat chloride also reduced shoot number and internodal length, leading to increased fruit yield. Overall, the bioregulator treatments altered leaf nutrient levels, with reduced nitrogen but increased phosphorus and potassium.