Preliminary Yield Trial of Early Maturity Hybrid Maize in Lampang Province

Abstract

     The objective of this experiment was to develop early maturity (90-100 days) field corn hybrids with yield potential and adaptability to the environment in Lampang province, Thailand. The
yield trials consisted of 47 crosses and 16 commercial check varieties at the research station of Rajamangala University of Technology Lanna Lampang from December 2021 - April 2022. The experimental design was arranged in a Randomized Complete Block with 2 replications. Each plot consisted of two rows with 5 m long, inter-row spacing of 0.75 m, and intra-row spacing of 0.25 m. The result showed that five crosses with the highest yield were Ki45 × UPFC066 (1,544 kg/rai), Kei1421 × UPFC024 (1,529 kg/rai), Kei1614 × UPFC019 (1,451 kg/rai), Ki45 × Nei452006 (1,447 kg/rai) and Ki57 × UPFC019 (1,431 kg/rai). While the five check varieties with the highest yield were DK9979C (1,597 kg/rai), SW5821 (1,436 kg/rai), SW5720 (1,376 kg/rai), CP389 (1,361 kg/rai) and PAC789 (1,355 kg/rai). The average moisture content of the hybrid crosses was 28%, while the check varieties were at 30% at the harvest date, suggesting that the new hybrids of this experiment were early-maturity maize hybrids.