本文就不同品种在不同插苗期的试验,分析研究其茎蔓生长及块根膨大的相互制约及其与温度条件的关系。初步结果认为:甘薯生长前期的高温日数应不短于60—90天,且后期要有一定适温日数,对块根膨大才有良好作用。晚熟种对前期高温日数要求较长,而早熟种则可相对较短。 In this paper, different varieties of seedlings in different trials, analysis of its stem and root growth and tuberosity of the mutual constraints and its relationship with the temperature conditions. Preliminary results suggest that: the sweet potato growth in the early days should not be shorter than 60-90 days, and the latter part of a certain number of days suitable temperature, expansion of tubers have a good effect. Late maturity of the pre-high temperature days require a longer time, while the precocious species can be relatively short.