不同氮素供应水平对马铃薯植株碳氮比及块茎形成的影响

发布时间：2018-06-14 07:08

本文选题：马铃薯 + 氮素供应　；参考：《内蒙古农业大学》2017年硕士论文

【摘要】：氮素是影响马铃薯生长发育及产量的重要元素,因而马铃薯生产中普遍使用氮肥,有关马铃薯氮素养分积累及其对产量形成的影响研究颇多,但氮素对马铃薯植株C/N的影响以及C/N对马铃薯块茎形成的影响却鲜有报道。有学者曾提出马铃薯块茎的形成可能与体内碳氮比(C/N)有关,此观点有待进一步验证。基于此,本研究以马铃薯品种夏坡蒂、费乌瑞它组培苗和克新一号脱毒种薯为供试材料,进行了两个生产季的温室微型薯繁育试验,以及一年的大田试验,通过调节氮素供应水平,观察植株的生长发育、体内C/N及马铃薯块茎形成的变化规律。经研究,得出如下主要结果:1.随着氮素供应水平的增加,马铃薯植株体内N浓度逐步增大,而植株C浓度并不增加,因此C/N逐步降低。2.随着植株体内C/N增大,马铃薯块茎形成提早,块茎重量和数量增加。
[Abstract]:Nitrogen is an important element affecting the growth, development and yield of potato. Therefore, nitrogen fertilizer is widely used in potato production. However, the effect of nitrogen on potato plant C / N and the effect of C / N on potato tuber formation were rarely reported. Some scholars have suggested that the formation of potato tubers may be related to C / N ratio C / N in vivo. On the basis of this, the experiment was conducted in greenhouse microtuber breeding experiment in two production seasons and one year field experiment with potato varieties such as Charlotte, Fiurita tissue culture seedling and Kexin 1 virus-free seed potato as the test materials. The growth and development of plants, the changes of C / N and potato tuber formation were observed by adjusting the nitrogen supply level. The main results are as follows: 1: 1. With the increase of nitrogen supply level, N concentration in potato plants gradually increased, but the C concentration did not increase, so C / N gradually decreased. With the increase of C / N in the plant, potato tubers formed earlier, and the weight and quantity of tubers increased.
【学位授予单位】：内蒙古农业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：S532

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