Effects of planting density on growth and yield of three waxy corn varieties in Cu Chi district, Ho Chi Minh City
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Abstract
Selection of waxy corn varieties with high yield, good quality and appropriate planting density for disseminating to production is a job that is interested by seed centers and companies. The experiment aimed to evaluate effects of planting density on growth and yield of 3 waxy corn varieties and was carried out from April 2021 to June 2021 in Cu Chi district, Ho Chi Minh City. The two-factor experiments were arranged in a split-plot design with 9 treatments and 3 replications. The main plot included 3 varieties of V068, V247 and V659. The subplot included 3 different planting densities of 74,100 plants/ha (70 x 20 cm), 57,100 plants/ha (70 x 25 cm, control) and 47,600 plants/ha (70 x 30 cm). The results showed that the planting density of 57,100 plants/ha was the most appropriate one for the growth and development of the corn varieties. At this plant density, the V068 variety produced 18.2 tons/ha with 66.0% of grade 1 corn and the profit margin was 1.15. The V247 variety produced 18.4 tons/ha with 70.2% of grade 1 corn and the profit margin was 1.23. The V659 variety produced 18.4 tons/ha with 71.8% of grade 1 corn and the profit margin was 1.28.
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