EFFECTS OF PLANT DENSITY ON THE GROWTH AND YIELD OF NUI DA STICKY MAIZE

Abstract

Nui da sticky maize is an open pollinated variety which has been cultivated by H’Mong people group in Northern mountainous regions, Vietnam. As other maize varieties, plant density is an important factor that affects to the growth and yield of nui da sticky maize. With aim to determine the suitable plant density for nui da sticky maize, an experiment was conducted from 2022 to 2024 with 05 treatments. The treatments included CT1: 39.000 - 41.000 plants/ha; CT2: 44.000 - 46.000 plants/ha; CT3: 49.000 - 51.000 plants/ha; CT4: 55.000 - 57.000 plants/ha and CT5: 60.000 - 62.000 plants/ha and and 3 replications. The results indicated that plant density had significant effect on leaf area index (LAI), yield and yield components. The highest LAI recorded in CT5. The grain yield of CT4 was 2.96 tons/ha in 2022, 3.27 tons/ha in 2023 and 3.38 tons/ha in 2024 and had significant higher in compared to these of CT1, CT2, CT3, but didn’t had significant higher as compared with this of CT5. In conclusion, it can be suggested that nui da sticky maize should be cultivated with plant density at 55.000 - 57.000 plants/ha (plant distance 70 x 25 cm).