Consumption of Three Main Products Continues Upward Climb

China’s retail sales maintain fast growth since Apr., thanks to the nation’s consumption-boosting policies. From January to August, the total industrial production value of statistics-worthy Chinese textile enterprises edged up 11.67 percent year-on-year.

Analysis of Dry-Wet Climate Change Characteristics and Main Influencing Factors in Main Grain Producing Area of Tibet from 1980 to 2021

Based on the daily meteorological observation data of seven meteorological stations in southern Tibet from 1980 to 2021 (April-October), the temporal and spatial variation characteristics and influencing factors of aridity index ( AI ) in the growing season of major grain producing areas in Tibet were studied by using climate tendency rate, Mann-Kendal test, Morlet wavelet analysis, GIS hybrid interpolation method, Pearson correlation coefficient, contribution rate analysis and other methods. The results showed that the average AI in the main grain producing areas of Tibet was 1.7, which belonged to the semi-arid area, and the overall trend was decreasing (humidifying) (-0.036/10 a). The linear decreasing trend was different in different regions, and the area around Lhatse County was the most significant (-0.26/10 a). AI had no obvious abrupt change, and had long- and medium-term fluctuation characteristics of 24 years, 6 years. The spatial distribution was uneven, and had the characteristics of ‘shrinking arid area and expanding humid area . The contribution rates of the main climate influencing factors of AI varied in different regions. In general, the contribution rates after quantification was as follows: precipitation (34.9%)>relative humidity (28.4%)>sunshine (19.9%)>maximum temperature (12.4%).

Consumption of Three Main Products Continues Upward Climb

China’s retail sales maintain fast growth since Apr., thanks to the nation’s consumption-boosting policies. From January to August, the total industrial production value of statistics-worthy Chinese textile enterprises edged up 11.67 percent year-on-year.

Increasing Subsidies to Main Grain Production Area——Necessity of the Rejuvenation of Northeast China

As an old industrial base, Northeast China is one of the most important grain production base. To rejuvenate Northeast China, it is necessary to strengthen farming products processing, lengthen industrial chain and develop sustainable agriculture.

Ideas and Countermeasures for Perfecting Rural Public Product Supply from the Perspective of Main Beneficiaries

On the basis of defining the concept of rural public product supply, the weaknesses of the supply mechanism of rural public product are analyzed. The shortages of rural public product supply lead to the difficult ties in developing agriculture and rural economy; enriching farmers and narrowing the urban and rural income gap. Problems in rural public product supply are further analyzed. Firstly, the national finance used in agriculture is low. Secondly, farmers are not separated from decision system and the beneficiaries separate from the decision-makers. Thirdly, farmers are not fully treated as civilians. Fourthly, rural areas lack the selection and supervision mechanism of public product. The ideas and countermeasures on perfecting rural public product are put forward from the perspective of main beneficiaries. The supply of rural public product should take intensifying the self development capability of farmers as core; farmers should actively participate in the making the rural public product decision and fight for their right to say. Farmers should unit together through organizations to improve the organizational level. Farmers should actively participate in trainings on them and try to get the updated information from the local government. The village collective should protect the supply of rural public product.

Technical Efficiency of Corn Production in Main Producing Region in China Based on DEA-Tobit

The Panel Data of corn production in 11 provinces are analyzed, such as Jilin, Heilongjiang, Liaoning, Inner Mongolia, Hebei, Shandong, Henan, Anhui, Jiangsu, Hubei and Sichuan. Based on the CRS, VRS and Malmquist exponential models of DEA, technical efficiency of corn production is measured in main producing region by DEA-Tobit. And its influencing factors are analyzed. Result shows that corn production in main producing areas is mainly scale inefficiency and is at the stage of decreasing returns to scale. Pure technical efficiency of corn production is effective in most main producing regions. Total Factor Productivity of corn production is improved in main producing regions, because the speed of technical progress is greater than the speed of efficiency reduction. In the years 1998-2008, corn production in main producing regions is rational in structure and is not affected by the natural disasters.

Optimal Design for Main Dimensions of a 75000t Floating Production and Storage Vessel

The basis, process and results of the demonstration of the main dimensions of a 75000t floating production and storage vessel are discussed in this paper. A simple but reliable orthogonal design method is applied in the main dimension optimization. The ideas of gradual approximation and feedback from various aspects are put into effect. During the demonstration, in order to make the model tally with the actual situation, the draft design is closely related to the computational analysis, so that the demonstration model can be verified at any time; the handling of the overall system is closely related to the research of each item, which is beneficial not only to the mastery of various regularities, but also to the balance of decisions. Finally, according to the computational results and the regularities obtained from analysis, the main dimensions are determined.

Industrial Policy Analysis of Restricted Development Zones in Western China——A Study of State-level Main Producing Areas of Agricultural Products and Key Ecological Functional Areas

As one of the important policies of promoting the formation of main functional areas, the industrial policy directly determines the sustainable growth of space control ability of main functional areas. A restricted development zone is a type of main functional area which provides agricultural products and ecological products, assures the supply of national agricultural products and the stability of ecosystems, as well as safeguards the ecological functions and agricultural functions of wider regions by restricting its own development. Therefore scientific, complete and operable industrial policy support is needed. Restricted development zones are distributed widely in western China. With the restriction of their main functions, differential industrial policies should be implemented in the development of the restricted development zones: Dealing well with the relationship between industrial development and ecological protection, developing special industries which are friendly to resources and environment and appropriate for local conditions, guiding and encouraging industries to learn from regions with favorable development conditions, orderly withdrawing industries and enterprises adverse to main functions, facilitating industrial structure upgrading, optimizing industrial organization, improving industrial technological level and rationalizing industrial layout.

The changing regional distribution of grain production in China in the 21st century

This paper examines the changing regional distribution of grain production in China. Based on the analysis of data from county statistics for the period 2000-2003, major differences in the main grain-output regions in China can be observed. The main grain-producing areas have shifted from the south to the north of China. New grain production regions have been also added to westem China since the late 1990s. The per capita grain consumption in one third of China＇s main grain-producing counties has fallen below 400 kg; most of these areas are located in southern China. In the new millennium, Northeast China, the central-south North China, and the add and semi-arid regions of Northwest China produced three quarters of the surplus grains. Most of these areas are located in regions susceptible to environmental change. The amount of grain production in these regions shows high fluctuations. It is argued here that fi.trther studies of recent environmental changes as well as a risk assessment of China＇s food security in main grain-output regions are needed.

Optimization methods of production layer combination for coalbed methane development in multi-coal seams

Based on the productivity equation of coalbed methane(CBM) wells, three indexes, main production layer optimization index, main production layer expansion index and capacity contribution index are proposed, with which the three-step optimization method of production-layer combination is established. In selecting main production layer, the coal seam thickness, CBM content, coal seam permeability, coal seam reservoir pressure and coal structure are considered comprehensively to evaluate the potential of the production layer. In selecting expansion of the main production layer combination, on the premise of ensuring full and slow desorption of the main production layer and non-exposure of the main production layer out of liquid surface, the degree of mutual interference between the main and non-main production layers is comprehensively evaluated by coupling the critical desorption pressure, layer spacing and reservoir pressure gradient difference. In optimizing production layer combination, the main concern is the economic efficiency of the combined layers. Only when the contribution coefficient of the main production layer is greater than 30% and the contribution index of the other production layers is more than 10%, the economic benefit of a CBM well after being put into production can be ensured. Based on the comparative analysis of the development effect of the development test wells in Songhe of Guizhou province, it is proved that the "three-step method" for the optimization of production-layer combination is scientific and practical, and can be used to design the multi-layer commingling scheme of coalbed methane.

An Analysis of Pig Production Efficiency and Regional Differences in China Based on Malmquist-DEA Model and Inter-provincial Panel Data

Pig production efficiency and its regional differences in China have strategic importance to the transformation of pig production mode and optimization of pig production layout in China. In this paper,Malmquist-DEA model is adopted to analyze the statistical data; TFP and its decomposition indicators of different pig breeding scale among the top ten pig producing provinces are calculated; both horizontal and longitudinal comparisons are made. Results show that among different pig breeding scales,free-range breeding scale is dominant in Hunan,small breeding scale is dominant in Sichuan,medium breeding scale is dominant in Sichuan and Hunan,and large breeding scale is dominant in Sichuan,Shandong and Jiangsu; among the provinces,pig production efficiency varies with breeding scale,and small-scale pig breeding in Sichuan,Guangdong and Hebei,free-range and medium-scale pig breeding in Hunan,medium-scale pig breeding in Henan and Yunnan,largescale pig breeding in the rest of the provinces,have significant efficiency advantage.

绿色金融赋能主产区粮食生产的高质量发展双效应研究

粮食主产区以粮食生产为中心,被赋予国家粮食安全的重大责任和率先推进农业农村现代化的艰巨任务,必须加快主产区粮食生产的高质量发展。基于此,构建以粮食生产为中心的经济循环系统理论分析框架,利用2012—2021年省级面板数据,采用固定效应、中介效应和门槛效应模型,实证检验绿色金融赋能主产区粮食生产的高质量发展“双效应”。结果显示,绿色金融赋能一方面通过粮食生产的要素改造、行为转变和产品升级产生直接效应,另一方面通过消费市场粮食产品生态化和价值化导向需求响应行为产生间接效应。研究表明,绿色金融赋能粮食生产高质量发展既具有金融工程的项目性质,可以利用不同的绿色金融工具实施;又具有区域经济系统的整体性和复杂性,需要利用不同的绿色金融工具组合及其功能创新才能实现,以防止和规避主产区以粮食生产为中心的经济循环“梗阻”现象。

生产集聚对粮食生产用水绿色效率的影响研究--以我国粮食主产区为例

基于2002-2021年我国13个粮食主产区的省级面板数据,运用区位基尼系数和Super-SBM模型对粮食主产区粮食生产集聚度和粮食生产用水绿色效率分别进行测度,在此基础上通过面板模型探究粮食生产集聚对粮食生产用水绿色效率的影响,并利用中介效应模型对路径机制进行检验。结果表明:研究期内我国粮食主产区粮食生产集聚度整体呈上升趋势,粮食生产用水绿色效率呈现“北高南低”的空间分布状态且整体无明显改善。粮食生产集聚度与粮食生产用水绿色效率呈“倒U形”关系,规模化经营和种植结构调整在“倒U形”关系中发挥中介效应且规模化经营的中介效应更大,科技创新的中介效应不显著。因此政府应因地制宜制定合理的粮食生产集聚政策,引导农户、组织及企业适度规模经营,提高种植结构的合理性,建立粮食生产集聚与技术创新的高效联动机制,促进粮食生产用水绿色效率的提升。

财政激励下主产区粮食低碳生产“稳中求进”策略——基于演化博弈模型的分析

2022年“中央一号文件”提出要牢牢守住保障国家粮食安全这条底线,而提升粮食综合生产能力是国家粮食安全、有效防范和抵御各类风险挑战、促进粮食生态可持续发展和推动农业领域碳排放目标的重要保障。本文以提升粮食综合生产能力、粮食低碳可持续发展能力的财政专项补贴为激励手段,构建粮食主产区政府、粮食生产者和社会组织三方演化博弈模型,通过模拟仿真分析在不同财政激励程度下对提升粮食综合生产能力、粮食低碳生态可持续发展能力的政策影响。研究结果表明:三方博弈主体在财政激励影响下,最终可达到粮食主产区政府激励、粮食生产者支持和社会组织保障的稳定均衡状态。故此,应强化粮食增产财政激励、加强财政转移支付精度、优化财政资金导向作用和注重粮食保障财政倾斜等发展策略,实现粮食低碳生产“稳中求进”。

我国香蕉主产区可持续发展能力评价研究

作为世界四大水果之一的香蕉,其可持续发展对农业增效、农民增收具有重要作用和意义。基于广东省、海南省、云南省3个香蕉主产区(以下简称三省)的632份实地调研数据,围绕人力资本、经济、资源、社会4个维度构建香蕉产业可持续发展综合评价指标体系,运用熵值法对香蕉产业的可持续发展水平进行评价。结果表明,三省的香蕉产业可持续发展能力整体偏低,地区间存在差距,云南省香蕉产业可持续发展能力最高,海南省香蕉产业可持续发展能力最弱。从4个维度来看,资源维度对香蕉主产区影响最大,社会维度对香蕉主产区影响最低。针对结果提出:加强专业种植知识培训,提升农户自身种植技术;加大政府政策资金支持,发挥企业农户带动作用;加强产业基础设施建设,健全产业金融服务体系;加快香蕉产业绿色发展,增加绿色农副产品供给。

双碳目标下粮食主产区农业绿色生产效率测度及空间分布

论文根据2003~2022年我国粮食主产区农业投入产出的面板数据,运用面板三阶段DEA模型测度粮食主产区的农业绿色生产效率,并对该区域农业绿色生产效率的空间分布作分级分析。研究发现:在去除环境因素和随机误差等因素对效率值的干扰后,人均GDP和人均可支配收入的增加均有利于提高农业绿色生产效率,自然灾害受灾面积的增加会阻碍农业绿色生产效率的提升。进一步分析发现,粮食主产区的农业绿色生产综合技术效率和规模效率均呈现出南北低、中间高的空间分布趋势,农业绿色生产纯技术效率值都比较高,空间分布上比较集中。为进一步提升粮食主产区的农业绿色生产效率及优化其空间分布格局,应优化财政支农资金投向,鼓励新型农业经营主体适度规模经营,差异化举措提升农业绿色生产效率,缩小区域农业绿色发展差距。