中文题名: | 测土配方施肥技术的农户需求与企业供给行为研究 |
姓名: | |
学号: | 2016206011 |
保密级别: | 公开 |
论文语种: | chi |
学科代码: | 120301 |
学科名称: | 管理学 - 农林经济管理 - 农业经济管理 |
学生类型: | 博士 |
学位: | 管理学博士 |
学校: | 南京农业大学 |
院系: | |
专业: | |
研究方向: | 农业政策 |
第一导师姓名: | |
第一导师单位: | |
完成日期: | 2020-12-01 |
答辩日期: | 2020-12-02 |
外文题名: | A Study on Farmers’ Demands and Enterprises’ Supply Behaviors of Soil Testing and Formulated Fertilization Technology |
中文关键词: | |
外文关键词: | Soil Testing and Formulated Fertilization Technology ; Adoption Effect ; Willingness to Pay ; Production Cost |
中文摘要: |
发展测土配方施肥技术是破解当前中国农业资源环境约束趋紧、耕地质量退化等问题的关键路径,但是在现阶段,中国测土配方施肥技术扩散速度仍然较慢。具体而言,尽管中国从2005年开始大力推广测土配方施肥技术,截至2014年4月测土配方施肥技术推广面积高达14亿亩次,但是在现实中,农户对测土配方施肥技术的采用率偏低,全国范围的技术采用率不足1/3。因此,剖析制约测土配方施肥技术扩散及采用效果的关键因素,对促进农户采用测土配方施肥技术具有重要意义。 虽然已有文献对测土配方施肥技术的扩散机制开展了较多研究,但鲜有文献关注政府的技术推广种类对该技术扩散及采用效果的影响。不同测土配方施肥技术扩散种类下,技术扩散速度可能存在差异。如在本文的调研样本中,推广1种配方肥的行政区域,与推广多种配方肥的行政区域,农户施用配方肥的比例存在差异,且推广多种时农户施用配方肥的比例反而更低。政府技术推广种类不同,对测土配方施肥技术扩散及采用效果产生的影响可能会不同,然而,已有研究对此关注较少。 不仅如此,在农户分化及规模化经营加快背景下,激励农户采用测土配方施肥技术亦需考虑到不同家庭禀赋对他们采用测土配方施肥技术的差异,就其关系展开分析。不同规模农户由于资金、知识等家庭禀赋的差异,对测土配方施肥技术的采用决策可能会表现出明显的异质性。 那么,为什么推广不同的技术种类时,测土配方施肥技术的采用概率存在差异呢?这背后的机理又是什么?是因为不同的技术推广种类对技术的采用效果或农户的支付意愿产生差异化影响吗?还是因为不同的技术推广种类对企业的生产成本产生差异化影响,进而影响测土配方施肥技术在农户层面的采用?这一系列问题的回答需要深入系统的剖析和科学规范的论证。 为了回答以上问题,本文基于成本—收益理论及测土配方施肥技术因地制宜的属性,构建测土配方施肥技术扩散的理论分析框架。本文以不同的技术推广种类作为切入点,分别从收益(即技术的采用效果、农户支付意愿)及成本(即企业供给)两个方面入手,分析不同的技术推广种类对技术采用效果、农户支付意愿、企业供给成本的差异化影响,深入研究测土配方施肥技术扩散的理论机制及制约因素。在此基础之上,本研究不仅利用土壤肥力监测数据、农户调研数据及企业访谈数据对理论假说开展实证检验,而且通过核算测土配方施肥技术采用的成本收益,对适宜补贴等问题进行进一步回答。本文的相应研究内容和主要研究结论归纳如下: 研究内容一:描述中国推广测土配方施肥技术的必要性及总结其他国家发展测土配方施肥技术的相关经验。 通过梳理文献及整理数据发现:首先,目前中国化肥的施用仍然存在化肥施用不合理的问题,需大力推广测土配方施肥技术。其次,发达国家推广测土配方施肥技术的经验证据表明,与小规模农场相比,大规模农场采用测土配方施肥技术的概率较高。 研究内容二:不同技术推广种类下测土配方施肥技术的环境及经济影响评估。 本文利用江苏省多年的土壤肥力监测数据和跨省的农户调查数据,基于动态面板模型及柯布-道格拉斯生产函数模型,对研究内容二进行实证分析。研究结果表明,在不同的技术推广种类下,采用测土配方施肥技术对土壤养分含量及水稻产量的影响不同,技术采用效果存在差异。具体而言,本研究结论可从以下两方面展开。 ①与施用传统化肥相比,如果政府推广的配方肥种类单一,施用配方肥并不能显著平衡土壤养分,但当政府推广多种配方肥时,施用配方肥可以平衡土壤养分,改善土壤质量。就江苏省而言,推广多种配方肥可以显著提高土壤速效钾含量、降低土壤全氮含量。 ②与施用推广1种的配方肥相比,当政府推广的配方肥种类多于一种时,施用配方肥可以提高水稻种植户的单产,进而提高其收入。 研究内容三:不同技术推广种类下农户对测土配方施肥技术的需求、采用及价格影响。 本文利用跨省的农户调查数据,基于实验经济学、双栏模型以及中介效应模型对研究内容三进行实证分析。研究结果表明,对于本文调研的样本区域而言,与推广1种配方肥相比,推广多种配方肥时,农户的支付意愿和企业的生产成本均增加,但由于企业生产成本增加的幅度更高,较高的配方肥价格抑制了农户的采用。且与小户相比,规模户对适用范围更精准的配方肥的支付意愿更高,采用概率更高。具体而言,本研究结论可从以下两方面展开。 ①在不同的技术推广种类下,农户对配方肥的边际支付意愿存在差异。与政府全县仅推广一种配方肥相比,受访者愿意为适用范围更精准的配方肥多支付0.653元/千克至4.461元/千克,且与小户相比,规模户的边际支付意愿更高。 ②对于本文调研的样本区域而言,与推广单一种类的配方肥相比,政府推广多种配方肥对农户的技术采用决策产生显著的负向影响。推广多种配方肥时,农户采用概率及程度下降的主要原因是企业生产成本上升,农户获取的配方肥价格升高,对农户的采用产生显著的负向影响。另外,本文的研究结果表明,与小户相比,规模户采用测土配方施肥技术的概率和程度更高。 研究内容四:不同技术推广种类下企业供给测土配方施肥技术的成本差异及原因分析 本文利用公开统计数据、企业访谈数据及相关文献,基于案例分析方法和成本收益方法对研究内容四进行分析。研究结果表明: ①在本文所选取的调研样本区,若政府推广1种配方肥,则政府不需要就配方肥价格进行补贴,只需考虑基础性工作成本,如检测土样的成本;若政府推广多种配方肥,则政府不仅需要考虑基础性工作的成本,亦需要每亩至少补贴1.308元,减少配方肥施用环节的成本,才能让农户有激励施用配方肥。 ②生产工艺及制度环境是引致不同技术推广种类下,企业供给配方肥时生产成本产生差异的原因。就生产工艺而言。配方肥区域性、小批量需求的特点使得大型化肥企业的规模效益难以实现,从而提高了配方肥的生产成本。此外,多样化产品配方需求与单一化产品供给之间的矛盾也是引致生产成本上升的主要原因。就制度环境而言。目前的配方肥定点生产企业招标采购模式可能会导致诸如政府采购规模小、供应商及采购专家缺乏、“寻租”、“设租”等一系列问题,进而对配方肥的生产成本产生不利影响。 根据上述研究结论,可以得到以下几点政策启示: 第一,农业部门在推广配方肥时,既需考虑因地制宜施肥的特性,亦需考虑到精准投入的高昂成本及品种过多带来的负向影响,推广适度的配方肥种类。 第二,政府在补贴发放过程中,为增强补贴政策的指向性、实效性,要重点扶持规模户,但同时也需兼顾到小户采用测土配方施肥技术的需求,处理好两者的关系。 第三,政府应加大财政补贴力度,为测土配方施肥技术及相关产品的研发提供支持。测土配方施肥技术的高投资成本是抑制该技术采用率的关键因素,随着技术进步,人们采用测土配方施肥技术的成本将逐渐减少,测土配方施肥技术扩散缓慢的困境将得到缓解。 第四,政府应制定相关政策积极引导农村土地经营权的有序流转,提升土地经营规模。 第五,对于配方肥招标政策而言,一方面,应严格控制招标程序,实现招标工作透明化。另一方面,为解决当前的采购规模小、供应商数量有限、专业人才缺乏等问题,可将招标单位由县级改为更高一级,将县域采购活动统一在市场内进行。 |
外文摘要: |
The development of soil testing and formulated fertilization technology is a critical way to solve the current problems of tightening agricultural resources and environmental constraints and the degradation of cultivated land quality in China. However, at this stage, the diffusion of soil testing and formulated fertilization technology in China is still slow. To be specific, although China began to promote the soil testing and formulated fertilization technology vigorously, as of April 2014, the area of the soil testing and formulated fertilization technology has reached 1.4 billion mu. Still the adoption rate of soil testing formulated fertilization technology is low, and the national technology adoption rate is less than 1/3. Analyzing the diffusion mechanism of soil testing and formulated fertilization technology, and analyzing the influencing factors of soil testing and formulated fertilization technology diffusion and adoption effect, are of considerable significance to promote the adoption of soil testing and formulated fertilization technology at the farmer level. Existing literature has carried out more research on the technology diffusion mechanism. Still, few works of literature have paid attention to the influence of the government's technology extension kind on the diffusion and adoption of precision agricultural technology. Under different agricultural technology diffusion kinds, the speed of technology diffusion may vary. For example, in the survey sample of this article, the proportion of county that promotes one kind of formula fertilizer is different from that of county that promotes a variety of formula fertilizers. Moreover, the proportion of applying formula fertilizers is lower when a variety of formula fertilizers is promoted. Different government technology promotion kinds may have different impacts on the diffusion and adoption of soil testing and formulated fertilization technology. However, there have been few studies focusing on this. In the context of the differentiation of farmers and the acceleration of large-scale operations, motivating farmers to adopt soil testing and formulated fertilization techniques also needs to consider the differences of family endowments. Due to differences in family endowments such as capital and knowledge, different-scale farmers may show obvious heterogeneity in their decision-making on the adoption of soil testing and formulated fertilization technology. So why is there a difference in the spread of soil testing and formulated fertilization technology under different types of technology promotion? What is the theoretical mechanism behind this? Is it because different types of technology promotion have different effects on the effect of technology adoption? Or do different types of technology promotion have a differentiated impact on the needs of heterogeneous farmers of scale, which then affects the spread of precision fertilization technology? Or do different types of technology promotion have a differential impact on the production costs of enterprises, which then affects the adoption of soil testing and formulated fertilization technology at the farmer level? The answer to this series of questions requires in-depth systematic analysis and normative scientific demonstration. This paper builds a theoretical analysis framework for the diffusion of soil testing and formulated fertilization technology based on the cost and benefit theory and precise attributes of soil testing and formulated fertilization technology. This article uses different types of technology promotion as the entry point, starting from two aspects: benefit (ie, the effect of technology adoption, farmers' willingness to pay) and cost (ie, enterprise supply) to study in-depth of the theoretical mechanism and constraints of diffusion soil testing and formulated fertilization technology. On this basis, this study will further use the soil fertility monitoring data, farmer survey data, and enterprise interview data to conduct empirical tests on the theoretical hypothesis and to sort out relevant policies and measures in countries with high rates of soil testing and formulated fertilization technology adoption. Besides, by calculating the costs and benefits of the soil test formulation technology, this paper is to further solve problems such as subsidies. This paper also summarizes policies and rules to provide a decision-making basis for promoting the diffusion of soil testing and formulated fertilization technology. The main research contents and conclusions of this article are as follows: Part 1: Describe the necessity of promoting soil testing and formulated fertilization technology in China and summarize relevant experience of developing soil testing and formulated fertilization technology in other countries. This chapter collects literature and data, and then finds, at present, the application of chemical fertilizers in China still has the problem of unreasonable application of chemical fertilizers, and compared with small-scale farms, the adoption rate of soil testing and formulated technology on large-scale farms is higher. Part 2: The impact of different technology extension kinds on the adoption effect of soil testing and formulated fertilization technology. This chapter uses the soil fertility monitoring data of Jiangsu Province for many years and cross-provincial farmer survey data, based on the dynamic panel model and Cobb Douglas production function model, to conduct an empirical analysis of the research content two. The results show that under different technology popularization modes, soil testing and formulated fertilization techniques have different effects on adoption effect. To be specific, this conclusion can be divided into two aspects as following. Firstly, compared with the application of traditional fertilizers, if the type of formula fertilizer promoted by the government is single, the use of formula fertilizer will not significantly improve soil fertility. Still, when the government advises more than one type of formula fertilizer, the application of formula fertilizer can balance soil nutrients and enhance the quality of the soil. As far as Jiangsu Province is concerned, the promotion of many formula fertilizers can significantly increase soil available potassium content and reduce soil total nitrogen content. Secondly, compared with the application of one type of formula fertilizer, when the government promotes a variety of formula fertilizers, the application of formula fertilizers can increase the yield of rice farmers and the income per mu of rice. Part 3: The demand, adoption and price impact of farmers on soil testing and formulated fertilization technology under different types of technology promotion. This chapter uses cross-provincial farmer survey data, and bases on the experimental economics, double hurdle model to conduct an empirical analysis of research content three. The research results show that for the sample area investigated in this article, compared with the promotion of one type of formula fertilizer, the farmers’ willingness to pay and the production cost both increase when a variety of formulated fertilizers is promoted. But the increase in the production cost of the company is even greater. And higher prices of formula fertilizers inhibited farmers' adoption. Besides compared with small households, large-scale households have a higher willingness to pay for formula fertilizers with a more precise scope of application and a higher probability of adoption. Specifically, the conclusions of this study can be developed from the following two aspects. Firstly, under different technology promotion kinds, there are differences in the marginal willingness of farmers to adopt formula fertilizers. Compared with the government's promotion of only one formula fertilizer throughout the county, respondents are willing to pay 0.653 yuan / kg to 4.461 yuan / kg for more accurate formula fertilizers. Farmers with larger land size have higher willingness to pay. Secondly, when promoting a variety of formula fertilizers, the main reason for the decline in the probability and degree of adoption of farm households is that the production costs of enterprises increase, and the price of formula fertilizers obtained by farmers increases, which has a significant negative impact on the adoption of farm households. Besides, when promoting a variety of formula fertilizers, there are differences in the decision-making between large-scale families and small households to adopt soil testing formulated fertilization technology. Compared with small families, large-scale households have a higher probability and degree of applying soil testing formulated fertilization technology. Part 4: Analysis of the reasons for the difference in the cost of soil testing and formula fertilization technology under different types of technology promotion. This article uses public statistical data, corporate interview data and related literature to analyze the fourth research content based on case analysis methods and cost-benefit methods. Research indicates: Firstly, in the survey sample area selected in this article, if the government promotes one type of formula fertilizer, the government does not need to subsidize the formula fertilizer price, but only needs to consider basic work costs, such as the cost of testing soil samples. If the government promotes multiple formula fertilizers, the government not only needs to consider the cost of basic work, but also needs to subsidize at least 1.308 yuan per mu to reduce the price of formula fertilizer, so that farmers can have incentives to apply formula fertilizer. Secondly, the production technoloy and policy are the reasons for the difference in production costs when a variety of formula fertilization is promoted. As far as the production technology is concerned. The characteristics of regional and small-batch demand for formula fertilizers make it difficult for large-scale fertilizer companies to achieve scale benefits, thereby increasing the production cost of formula fertilizers. In addition, the contradiction between the demand for diversified product formulations and the supply of singular products is also the main reason for the increase in production costs. As far as the policy is concerned. The current bidding model may cause a series of problems such as small government procurement, lack of suppliers and procurement experts, rent-seeking, and other problems, which will adversely affect the production cost of formula fertilizers. According to the above research conclusions, this paper obtains the following policy implications: First, when the agricultural sector promotes formula fertilizers, it is necessary to consider the characteristics of fertilizing according to local conditions, as well as the high cost of precise input and the negative impact of excessive varieties, and promote appropriate types of formula fertilizers. Second, in the process of granting subsidies, the government should focus on supporting large-scale households to enhance the directivity and effectiveness of the subsidy policy, but it also needs to consider the needs of small households to adopt soil testing formulated fertilization technology and handle the relationship between the two. Third, the government should increase financial subsidies to provide support for the research and development of precision farming technologies and related products. The high investment cost of soil testing and formulated fertilization technology is a critical factor that inhibits the adoption rate of this technology. With the advancement of technology, the cost of people adopting soil testing and formulated fertilization technology will gradually decrease, and the slow spread of soil testing and formulated fertilization technology will be eased. Fourth, promote land circulation and increase the scale of land. Fifth, regarding the formula fertilizer bidding policy, on the one hand, the bidding procedures should be strictly controlled to achieve transparency. On the other hand, to solve the current problems of small procurement scale, limited number of suppliers, and lack of professional talents, the tendering unit can be changed from the county level to a higher level. |
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中图分类号: | F32 |
开放日期: | 2020-12-09 |