Yield and weight distribution of two potato cultivars grown from seed potatoes of different physiological ages

After seed potatoes (Solanum tuberosum L.) are harvested, they may be stored in sheds, in low temperature coolers or left un-lifted in the ground. This research describes the response of tuber yield and distribution (formed by the weight grade of each potato) of ‘Bondi’ and ‘Fraser’ crops planted from seed potatoes at different physiological ages generated from different combinations of these storage regimes applied in the Early and Late phases of storage. De-sprouting half of the potatoes prior to planting was used to accelerate the rate of physiological ageing, synchronise the planting material and increase the range of treatments. Total yield and number of potatoes produced were unaffected by any of the storage treatments and reflected a constant pattern of canopy development, radiation use efficiency and harvest index. The largest tubers were attained by higher rates of tuber growth which was inversely related to the number of stems per plant.种薯（seed potatoes，学名Solanum tuberosum L.）收获后，可储藏于棚舍、低温冷库，或留于田间暂不采收。本研究针对由储藏早、晚两阶段不同组合的储藏制度诱导产生的不同生理年龄种薯所种植的‘邦迪’（Bondi）与‘弗雷泽’（Fraser）品种，分析其块茎产量与块茎分布（由单薯重量分级构成）的响应特征。研究于种植前对半数种薯实施去芽处理，以加速其生理老化进程、统一播种材料的生理状态，并拓展处理梯度范围。总块茎产量及单薯数量均未受各类储藏处理的影响，其变化规律与冠层发育、辐射利用效率及收获指数的固有模式保持一致。块茎生长速率越高，所获块茎体积越大，而该生长速率与单株茎秆数量呈负相关关系。