Forage Yield Performance of Soybean Genotypes for Spring Seeding and Double Croppnig

Authors : Esvet AÇIKGÖZ, Abdurrahim GÖKSOY, Gary WIETGREFE, Ayşen UZUN, Mehmet SİNCİK

Pages : 7-16

View : 26 | Download : 7

Publication Date : 2020-10-09

Article Type : Research Paper

Abstract :Soybean, an annual broadleaf legume, may be grown as hay and pasture crop or ensiled with corn and sorghum for livestock. Field experiments in a Mediterranean-type climate were conducted in the 2013, 2014 and 2015 growing seasons to evaluate DM yield and some yield components of soybean genotypes [Glycine max insert ignore into journalissuearticles values(L.); Merr.] in Bursa, Turkey. In the study’s first step, seventy soybean genotypes and five check cultivars were evaluated in augmented design in 2013 and then selected genotypes were grown in a completely randomized block design with three replications in 2014 and 2015 experimental years. All field studies were established in main insert ignore into journalissuearticles values(spring planting); and double cropping conditions, simultaneously. There were statistically significant differences between soybean genotypes in dry matter insert ignore into journalissuearticles values(DM); yield, yield components and partitioning of soybean plant parts in both main and double cropping. In main cropping conditions, DM yield of fifteen selected soybean genotypes averaged 15931 kg ha-1 in first and 9645 kg ha-1 in the second year of the study. Indicating planting date and year-to-year genotype differences, the DM genotypes ranged from 5683 to 26028 kg ha-1 in the main cropping system. Nine genotypes were also evaluated over two years for plant height, branching, leaflet size, and DM yield in a double cropping system with significant differences in evaluated traits and DM yield. Even in the double cropping system, soybean genotypes averaged well over seven tonne per hectare DM with a range of 4568 to 13293 kg ha-1. As an indication of soybean forage quality, leaflet percentage increased and stem percentage decreased in the double cropping system. In a Mediterranean climate, soybeans for forage can provide a high-yield annual broadleaf alternative to annual grass or perennial forages by critically evaluating cultivar selection.
Keywords : forage soybean, Glycine max L, Merr, haying, plant components, seeding time