tailieunhanh - Dry matter accumulation and forage quality characteristics of different soybean genotypes

Three different soybean [Glycine max (L.) Merr.] cultivars (A-3127, Derry, and Yemsoy) were evaluated for dry matter (DM) yield, plant components, and crop growth rate (CGR) at different row spacings and harvesting stages in 3 locations with Mediterraneantype climate in a split-split plot design with 3 replications in 2009 and 2010 | Turkish Journal of Agriculture and Forestry Turk J Agric For (2013) 37: 22-32 © TÜBİTAK doi: Research Article Dry matter accumulation and forage quality characteristics of different soybean genotypes 1, 1 2 3 4 Esvet AÇIKGÖZ *, Mehmet SİNCİK , Gary WIETGREFE , Mustafa SÜRMEN , Semiha ÇEÇEN , 5 4 1 Tamer YAVUZ , Cengiz ERDURMUŞ , Abdurrahim Tanju GÖKSOY 1 Department of Field Crops, Faculty of Agriculture, Uludağ University, 16059 Bursa, Turkey 2 Syngenta Seeds, Inc., Sioux Falls, South Dakota, USA 3 Department of Field Crops, Faculty of Agriculture, Iğdır University, Iğdır, Turkey 4 West Mediterranean Agricultural Research Institute, Antalya, Turkey 5 Department of Field Crops, Faculty of Agriculture, Ahi Evran University, Kırşehir, Turkey Received: Accepted: Published Online: Printed: Abstract: Three different soybean [Glycine max (L.) Merr.] cultivars (A-3127, Derry, and Yemsoy) were evaluated for dry matter (DM) yield, plant components, and crop growth rate (CGR) at different row spacings and harvesting stages in 3 locations with Mediterraneantype climate in a split-split plot design with 3 replications in 2009 and 2010. In addition, crude protein (CP), crude protein yield (CPY), acid detergent fiber (ADF), neutral detergent fiber (NDF), total digestible nutrients (TDN), and relative feed value (RFV) of harvested forage soybeans were determined at the Bursa (Turkey) location. Increased row spacings significantly reduced DM yield at all locations. Combined over other main effects, the 25-cm row spacing produced 35% more DM yield than the 75-cm row spacing. Row spacings greatly affected DM yield at the R5 and particularly the R7 stage, but this effect was minimal at the R1 stage. The forage-type cultivar Derry produced significantly higher DM yield in all locations, particularly at the R5 and R7 stages. The constituent components of DM were .