巴西东北部地区常年干旱少雨,气候炎热,适宜腰果生长。但由于过去只采用传统方法种植,腰果产量每公顷仅有240kg。经过数年研究,科技人员对当地一种矮小、早熟的腰果苗进行克隆研究出的新苗木已使单产从每公顷240kg提高到1000kg左右,而且果实的形状、颜色和大小一致。目前,在整个东北部地区65hm2腰果种植园中,已有10％种上了这种腰果。在此基础上,当地农民又对腰果种植 In northeastern Brazil, perennial dry weather, hot climate, suitable for the growth of cashew nuts. However, due to the traditional method of planting in the past, the output of cashew nuts is only 240 kg per hectare. After years of research, new seedlings made by scientists and technologists for cloning a short, precocious cashew seedling have raised yields from about 240 kg per hectare to about 1,000 kg per hectare, with the same shape, color and size of the fruit. Currently, 10% of the 65hm2 cashew plantations in the entire northeastern region have been planted with this type of cashew nut. On this basis, local farmers also planted cashew nuts