Optimization Model of the Effects of Transplanting Density, Nitrogen and Potassium Fertilization on Yield and Quality of an Aromatic Hybrid Rice "Luyoumingzhan".

Effects of transplanting density, nitrogen (N) application quantity and potassium (K) application quantity on hybrid rice "Luyoumingzhan" were studied by optimal design. Regression models between yield, quality and the three cultivation measures were built to study the effects of the three cultivation measures on rice yield and quality. The results showed that the yield and quality were influenced in various degrees. An optimization measure for high yield and low chalky ratio was simulated by computer, which was 214500 clumps per ha, 140.2 kg N per ha and N 136.6 kg per ha. [ABSTRACT FROM AUTHOR]