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长豇3号是由之豇28-2和指甲青经过有性杂交后，采用系谱法，经8代系统选育而成的。迟熟，耐热性强，病害轻，结荚率高，667m~2产量2800kg。适合作夏秋栽培。
Asparagus 3 is the result of sexual hybridization between the cowpea 28-2 and the nails through pedigree method, which was bred by 8 generations of system. Late maturity, heat resistance, disease light, high rate of pod, 667m ~ 2 output 2800kg. Suitable for summer cultivation.