高蛋白大豆新品种桂春9号的选育及栽培技术研究

桂春9号系用桂338为母本、桂豆3号为父本，经有性杂交选育而成的高蛋白春大豆新品种。该品种具有耐旱耐瘠、高产优质、高蛋白、抗多种大豆病害、适应性广等特点，适宜播种期为2月20日～3月20日，适宜栽培密度为25万株／ha，适宜肥料配比为N75kg／ha、K2O75kg／ha、P2O5 112．5kg/ha。在适宜播种期内，春播生育期94d，夏播85d，适合在广西各地纯种或间套种。2008年通过广西农作物品种审定委员会审定。

Breeding high-protein soybean variety Guichun 9 and its cultivation technique

Soybean variety Guichun 9 bred by hybridization of soybean varieties Gui 338 （female parent） and Giudou 3 （male parent） was found to be contained very high-protein and suitable for spring planting. It was found to be characterized by tolerance to drought, high-yield and good grain quality, high-protein, resistance to several diseases and wide adaptability, etc. The suitable sowing date for Gnichun 9 is from Februay 20 to March 20 with planting density of about 250000 plants per hectare. The fertilizer application of 75 kg/ha nitrogen, 75 kg/ha K20 and 112.5 kg/ha P205 may be recommended for its proper cultivation. The growth duration of spring planted Guichun 9 was found to be 94 days and that of summer planted soybean was 85 days. It is also suitable for single planting or intercropping in all area of Guangxi and it was certified and registered by Guangxi Committee for Crop Variety Registration in 2008.