论文部分内容阅读
甜菜在南方露地采种种植,生育期的长短主要受年前营养生长期的限制,在甜菜的整个生命史中,当其它生活因子都得到满足时,其生长发育速度和一定范围内的气温成正相关关系,而且只有当温度积累到一定的总和时,才能完成其发育周期。正常季节下种植的甜菜,尽管不同年份间生育期有一定差异,但其越冬后的有效积温往往是相对稳定的,本文利用三年试验材料,通过对本地20年气象资料的整理,找出了
Sugar beets are planted and planted in the open field in the South. The length of the growth period is mainly limited by the vegetative growth period of the year before. In the whole life history of beet, when other life factors are satisfied, the growth and development speed is positively correlated with the temperature within a certain range Relationship, and only when the temperature accumulated to a certain sum, to complete its development cycle. The sugarbeet planted in the normal season, although the growth period in different years have some differences, but the effective accumulated temperature after winter is often relatively stable. In this paper, three years of experimental materials, through the local 20 years of meteorological data to find out