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天畅一号是从农家资源(87-3)变异单株中系统选育而成的豇豆新品种。其嫩荚白绿色,肉质脆嫩,耐老化,商品性佳;荚面平整,荚条长而直,荚长85 cm,单荚重22～28 g;叶片中等大小,以主蔓结荚为主,始花节位6～8节;中熟,春播全生育期85～95天,夏播70～80天;春露地栽培产量2 000～2 500 kg/667m2,夏秋露地栽培1 800～2 200 kg/667m2。
Tian Chang 1 is a new variety of cowpea that was systematically bred from mutants of farmland resources (87-3). The tender pod is white and green, the flesh is crisp and tender, anti-aging and has good commercial properties; the pod surface is flat and the pod is long and straight, the pod length is 85 cm and the weight of single pod is 22-28 g; The main flowers are 6 to 8 in mid-ripening; the spring is sowing the whole growing period is 85 to 95 days and the summer sowing is 70 to 80 days; the cultivation yield in spring is 2,000-2,500 kg / 667m2; 200 kg / 667m2.