INCREASING GROWTH AND PRODUCTION OF CORN (Zea mays L.) WITH DIFFERENT PLANTING POINT PATTERNS AND MANAGEMENT OF WEEDS
Dedy Mahyono (a) Edison Purba (b*) Marheni (b)

a) Magister Student of Agrotechnology, Universitas Sumatera Utara, Prof. A. Sofyan No. 3 Kampus USU, Medan, Indonesia Republic-20155.
b) Department of Agrotechnology, Universitas Sumatera Utara, Prof. A. Sofyan No. 3 Kampus USU, Medan, Indonesia Republic-20155.
*edisonpurba[at]usu.ac.id

Abstract

This study aims to determine the pattern of planting points, and to determine the effect of weed control with pre-emergence herbicides on the growth and production of maize. This research was conducted from November 2019 to the end of February 2020 in Sendang Rejo Village, Binjai District, Langkat Regency. The design of this study used factorial split-plot design: Factor I: The planting point pattern (P)- P1 = Single row cropping point pattern (70 cm x 20 cm), P2 = Two row planting point pattern (20 cm x 20 cm, the next row spacing is 70 cm), P3 = Triangular planting point pattern (20 cm x 20 cm, distance with the next row of triangles 70 cm). Factor II: Herbicide Application (H)- H1 = No herbicide application (control), H2 = Weed free (manual control), H3 = applied with dimethenamide-P + saflufenacil 3 days before planting, H4 = applied with dimethenamide-P + saflufenacil at planting, H5 = applied with dimethenamide-P + saflufenacil aged 3 DAP H6 = applied with topramezone + atrazine at 14 DAP, H7 = applied with topramezone + atrazine at 21 DAP. Parameters observed in this study were plant height, amount of leaf chlorophyll and production. The results showed that the pattern of planting points had a very significant effect on plant height at the age of 6 and 8 WAP and total chlorophyll and corn production (Zea mays L.). Weed control with pre-emergence and post-growth herbicides had no significant effect on plant height, total chlorophyll and maize production (Zea mays L.). However, from this study it was found that the best herbicide application was at H7 (Toppramezone + atrazine at 21 days after planting). While the use of planting point patterns and weed control with pre-emergence and post-growth herbicides interacted significantly with the observation of total chlorophyll, while there was no significant effect on the observation of plant height and maize production (Zea mays L.).

Keywords: Planting point pattern, maize, herbicide

Topic: Agricultural Environment, Ecology and Resources