Mechanized Hybrid Rice Seed Production: Planting Density, the Flight Height of an Unmanned Aerial Vehicle, Fertilizer Application, and the Row-Ratio of Parents

The mechanized seed production of hybrid rice (Oryza sativa L.) represents significant progress in modern agriculture. However, the technologies and crop management strategies are still immature. present study was conducted with three field experiments to explore effects different planting densities, flight height an agricultural unmanned aerial vehicle (AUAV) for assisting pollination, fertilization techniques, row-ratio restore line sterile on yield production. In experiment 1, densities “DS1: 250000 hills per ha; DS2: 285000 DS3: 3,33,000 ha” heights AUAV (FH1: above ground 2 m; FH2: 3 FH3: 4 m) were adopted. results showed that DS1 DS2 treatments produced a higher than DS3 treatment, FH2 treatment significantly FH1 FH3. 2, two fertilizer application methods, deep placement traditional manual broadcasted fertilizer, increased by increasing effective panicle number grain panicle. 3, row-ratios at 8:1 (R1), 9:1 (R2), 10:1(R3) adopted, highest recorded R1 treatment.