The study looked at how nutrients like nitrogen, phosphorus, and potassium are taken up and distributed in high-yield mechanical transplanting rice. They found that most of the rice's grain yield comes from dry matter accumulation after the rice plants flowered. Nitrogen uptake increased with higher yields, mainly from nitrogen accumulation after flowering. Phosphorus and potassium uptake also increased with higher yields. To achieve high yields, rice needs 2.0-2.1 kg of nitrogen for every 100 kg of grains, with an optimal ratio of nitrogen to phosphorus to potassium of 2.0 : 0.9 : 1.4.