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大白芸豆系多花菜豆中白花,自籽的品种。在云南省的高寒山区(海拔2,200—2,400米)分布较广。但由于管理粗放,亩产仅300斤上下。近几年为了满足外贸出口的需要,研究了施用氮肥及种植密度等技术问题,进一步挖掘大白芸豆的增产潜力。一、氮肥与产量据1981年试验,在开花时亩施尿素22公斤,亩产668.94斤,比不施的299.63斤每亩增产869.31斤,从产量构成因素来看,施肥的单株荚数为23.01个,单株荚粒数2.59粒,百粒重130.9克,荚长12.37厘
Department of white beans more flowering beans in white flowers, since the seed varieties. Alpine mountain in Yunnan Province (2,200-2,400 meters above sea level) is widely distributed. However, extensive management, only 300 pounds per mu up and down. In recent years in order to meet the needs of foreign trade exports, the study of the application of nitrogen fertilizer and planting density and other technical issues to further tap the growth potential of white kidney beans. I. Nitrogen fertilizer and yield According to the experiment in 1981, 22 kg of urea was applied at the time of flowering, 668.94 kg of mu per mu was produced, and 869.31 kg of sorghum was harvested per 299 mu of sugar than that of 299.63 kg per mu. From the perspective of yield components, 23.01, the number of pods per plant 2.59, the weight of 130.9 grams, pod length 12.37%