不同供碳水平对马铃薯植株生长发育和块茎形成的影响

发布时间：2018-03-19 11:47

本文选题：马铃薯　切入点：生长发育　出处：《内蒙古农业大学》2017年硕士论文　论文类型：学位论文

【摘要】：块茎作为马铃薯的经济器官,其形成时间和生长发育过程是马铃薯最终产量的基础,因此,马铃薯块茎的形成过程及影响因素一直是植物生理学及农学领域的研究热点。早在20世纪初有国外学者提出马铃薯块茎的形成可能与体内碳氮比(C/N)有关,但至今关于C/N1对块茎形成的影响仍尚不明确。基于此,本研究在保证氮素供应水平一致的前提下,通过调节碳素供应以改变体内C/N的方法来检验此学说。根据碳素的来源,设计了两个试验来调节碳素供应:一是通过增施CO2以增加碳素供应,二是通过改变种薯大小以增加碳素供应。主要研究结果如下:1.增施CO2虽未对马铃薯植株体内全碳含量造成影响,但却使植株全氮含量显著下降,因此导致体内C/N上升。2.通过增加CO2供应引起的马铃薯植株C/N的上升促进了块茎的提前形成,且显著提高了结薯数量与重量。3.增加种薯重量,可在马铃薯苗期为植株提供更多的碳源,从而加速块茎形成,提高马铃薯结薯数和薯重。
[Abstract]:Potato tubers as economic organs, the formation time of the process of growth and development of potato yield is the basis, therefore, the formation process and influencing factors of potato tuber has been a hot research field of plant physiology and agronomy. In early twentieth Century the foreign scholars have proposed formation may be related to the ratio of carbon and nitrogen in potato tuber (C/N about, but so far) about the effect of C/N1 on tuber formation remains unclear. Based on this, this study under the premise of ensuring a consistent level of nitrogen supply under the method by adjusting the carbon supply to change the C/N in order to test this theory. According to carbon sources, two experiments are designed to regulate carbon supply. Through the application of CO2 to increase the carbon supply, two by changing the size of seed potato to increase carbon supply. The main results are as follows: 1. by application of CO2 is not on the carbon content of potato plant building Into effect, but the total nitrogen content decreased significantly, resulting in increased C/N in.2. increased by C/N potato plants by increasing the supply of CO2 caused by promoting early tuber formation, and significantly improved by increasing the number and the weight of.3. potato seed tuber weight, can provide more carbon source for plants in potato seedling stage, thereby accelerate tuberization, improve potato tuber number and tuber weight.

【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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