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耕地面积变化和粮食产量变化分析

时间:2019-10-11 20:58来源:毕业论文
从五个部分来阐述分析徐州市耕地面积变化和粮食产量变化相关关系。第一部分为概述,主要阐述耕地利用现状,论文的研究背景、目的、意义、方法和内容。并通过相关文献的综述,

摘要中国是人口大国,粮食产量的问题关系到中国十几亿人口的吃饭问题。因此,粮食问题是关系到国家发展的大事[1]。然而,耕地资源是粮食生产的基础性生产资料。在一定时期和一定区域内,耕地面积变化必然会引起粮食播种面积的变化,从而引起粮食产量的变化。因此探讨耕地面积和粮食产量的协调发展,对粮食生产,可持续发展具有重要作用。但是,随着城市化和工业化的发展,大量的耕地被城市建设等原因占用。这一现象的出现会对粮食产量产生怎样的影响,会不会影响我国的粮食安全问题?本文通过徐州市耕地面积和粮食产量的资料与数据,采用文献研究、理论研究及实证研究等方法理对徐州市耕地面积变化和粮食产量变化进行研究分析,探究二者之间的相关关系。根据所得出的分析结果,对徐州市耕地问题和粮食问题提供参考意见,丰富徐州市耕地面积变化和粮食产量变化相关问题的研究。39867
本文从五个部分来阐述分析徐州市耕地面积变化和粮食产量变化相关关系。第一部分为概述,主要阐述耕地利用现状,论文的研究背景、目的、意义、方法和内容。并通过相关文献的综述,以明确选题的科学性和合理性。第二部分主要介绍了徐州市的概况。简单介绍了徐州市的位置,气候,温度带等基本的地理要素。第三部分讲述了徐州市耕地现状,并分析了在政策大环境下对徐州市耕地面积变化影响的原因;徐州市粮食产量情况并根据当时的社会和自然背景分析其变化的原因。第四部分为主要的分析过程,讲述了相关系数的算法,并且对耕地面积和播种,播种面积和粮食产量进行分析。主要依据统计徐州市统计年鉴的资料,根据各年耕地面积和粮食产量计算出耕地面积年变化率和粮食产量年变化率进行分析比较,运用SPSS分析耕地面积和播种面积,播种面积和粮食产量相关性。得出耕地面积变化和粮食产量的变化相关关系。第五部分通过第四部分得出的结果,对结果总结得出结论,同时提出相关的合理的建议。 源`自<六:维*论-文>网/www.lwfree.cn
毕业论文关键词:粮食产量  耕地资源  耕地面积  变化
Researching and analyzing the variation of agricultural acreage and grain production
--taking Xu Zhou as example
Abstract
China is a populous country, and the issue of grain yield will impact on the problem of feeding 1.4 billion population. As a consequent, the grain output is deeply associated with national development strategy. Basically, cultivated land resource is the main means of production for the grain production. However, in a certain time and zone, the variation of cultivated area must result in the variation of grain sown area and subsequent grain output. Thus, probing into the coordinated development between cultivated area and grain yield plays a key role for grain production and sustainable development.
With the development of urbanization and industrialization urban construction has occupied a large number of cultivated lands.  The appearance of this social phenomenon raises the following issues: what the influences are for grain production? Does it affect food security problem? This dissertation will research and analyze the variation of agricultural acreage and grain production, as well as research into their associated relationships with the data of arable area and grain production in Xu Zhou by literature research, theoretical research and empirical research and other methods. According to the result of analysis, providing some reference comments for Xu Zhou cultivated land issue and grain issue, and enriching this related topic of research.
This dissertation will be pided into five sections to elaborate and analyze the relationship between agricultural acreage change and grain production variation. The first part is introduction, which mainly states utilization status of cultivated land, background, objectives, significance, methodology and content. Additionally, using some related literature to ensure this topic is scientific and reasonable. The second part will introduce general information of Xu Zhou city, such as location, climate, temperature band, and other basic geographic features.  The third part will describe the current cultivated land situation of Xu Zhou, and analyze the reason that new policy has influence on change of agricultural acreage. Moreover, it will also discuss the reasons of Xu Zhou’s grain production change based on the society and environment at that time. The forth part is primary analytic processes, which demonstrate the algorithm of correlation coefficient, analyze cultivated area, sown area and grain production as well. On the basis of annual statistical data of Xu Zhou, each year’s cultivated area and grain production figure out their annual change rate to analyze and compare. What’s more, applying SPSS into analysis of correlation among cultivated area, sown area and grain production, then working out the relation of cultivated land change and the change of grain yield. The last part will summarize the forth part and get conclusions, simultaneously, making some relevant and reasonable suggestions.  耕地面积变化和粮食产量变化分析:http://www.lwfree.cn/guanli/20191011/40562.html
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