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http://dx.doi.org/10.5333/KGFS.2021.41.4.223

Effects of Gypsum on Dry Matter Yield and Chemical Composition of Alfalfa in Reclaimed Tidal Land with Soil Dressing  

Kim, Ji Yung (College of Animal Life Sciences, Kangwon National University)
Jo, Hyun Wook (College of Animal Life Sciences, Kangwon National University)
Lee, Bae Hun (National Institute of Animal Science, RDA)
Jo, Mu Hwan (College of Animal Life Sciences, Kangwon National University)
Kim, Byong Wan (College of Animal Life Sciences, Kangwon National University)
Sung, Kyung Il (College of Animal Life Sciences, Kangwon National University)
Publication Information
Journal of The Korean Society of Grassland and Forage Science / v.41, no.4, 2021 , pp. 223-233 More about this Journal
Abstract
The objective of this study was to investigate the effect of gypsum on the dry matter yield and the chemical composition of alfalfa in reclaimed tideland with soil dressing. The experimental site was Sukmoon reclaimed tideland. The tideland was reclaimed approximately 17 to 33 years ago and the 70 cm of soil was top-dressed. The soil that covers the reclaimed tideland brought from the island did not treat di-salinized. Treatments were consisted of three groups; control group where no gypsum (G0) was applied and two experimental groups where 2 ton/ha (G2) and 4 ton/ha (G4) of gypsum were applied, respectively. The first harvest was conducted when the alfalfa reached early flowering (open the flower 10%), and after that subsequent harvest was conducted at approximately 35 days intervals. The dry matter yield of the alfalfa showed that G2 was significantly higher in the first year than G0 and G4, and G2 tended to be higher in the second year than G0 and G4, although there were no significant differences between treatments. The reason for the high dry matter yield in G2 was that the soil pH and EC of the soil were at marginal and ideal levels and the coverage and alfalfa botanical composition were also high. In both years, there were no differences in the crude protein, neutral detergent fiber and acid detergent fiber contents and relative feed value between gypsum treatments. Meanwhile, the results in the first and second years showed that the alfalfa dry matter yield were negatively affected by droughts stress in spring and concentrated precipitation in summer. Therefore, this study suggests gypsum treatment in reclaimed tidal land could increase the dry matter yield of alfalfa, and 2 ton/ha of gypsum was the optimum rate.
Keywords
Reclaimed tidal land; Alfalfa; Gypsum; Dry matter yield; Chemical composition;
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