Current Situations and Recommendations for Non-grain Tendency of Farmland in Anhui Province

This paper firstly sorted out current situations of farmland protection and increasingly significant non-grain of farmland in Anhui Province in recent years.Then,it made an in-depth analysis on causes for non-grain problem,and analyzed adverse influence on national grain security.On this basis,it came up with recommendations for alleviating non-grain problem of farmland in Anhui Province:strictly protecting capital farmland,reasonably guiding distribution and scale of grain production;treating non-grain problem of farmland according to specific situations;reforming and improving grain subsidy policy;establishing a new agricultural land circulation mechanism with family farm as subjects,other types as supplements,and access and supervision system as guarantee.

Analysis on the Influencing Factors and Control Measures of "Non-Grain Conversion" of Cultivated Land in Agricultural Land Transfer

Through the method of literature analysis,this paper analyzes the present situation of the"non-grain conversion"of cultivated land in the transfer of agricultural land in China,summarizes the influencing factors and consequences of the phenomenon of"non-grain conversion"of cultivated land in the transfer of agricultural land,and finally puts forward some measures.The study found that costs and benefits are the fundamental factors affecting the"non-grain conversion"of cultivated land in agricultural land transfer,and other main factors include government and policy guidance,industrial and commercial capital to the countryside,labor transfer and so on.The"non-grain conversion"of cultivated land in the transfer of agricultural land is a serious threat to China s food security,leading to the decline of the quality of agricultural land and the destruction of the ecological environment,as well as the risk of breach of contract in"industrial and commercial capital to the countryside".Based on the understanding of the influencing factors of non-grain conversion,this paper puts forward the following measures:strengthening the control of the use of cultivated land in agricultural land transfer;implementing accurate subsidies for grain cultivation and ensuring the benefit of grain growers;adopting grain planting incentive mechanism to increase grain enthusiasm;strengthening media publicity and education to enhance food security awareness.The improvement of the current situation of the"non-grain conversion"of cultivated land in the transfer of agricultural land will be of great significance to the protection of agricultural land and food security in China.

Research Progress,Problems and Prospects of"Non-grain"of Cultivated Land in China

This study aims to sort out the relevant research results of"non-grain"of cultivated land in China,summarize the research progress,and put forward questions and prospects,so as to provide theoretical reference for the research on solving the problem of"non-grain"of cultivated land to ensure food security and promote industrial development.Literature analysis and comparative analysis were adopted.Most of the previous studies used the planting structure to measure the"non-grain"level of cultivated land,and few studies took changes in the quality and quantity of cultivated land as the breakthrough point.On the research scale,most of them were carried out in provinces and municipalities,and there were few multi-scale coupling studies that combined macro and micro scales.Driving factors and macro management and control strategies were the main research content,and there was little research on the construction of regional synergistic systems.In terms of research methods,most of them were quantitative analysis using mathematical statistical models,and few studies combined spatial analysis technology,model simulation and other methods.It is necessary to build a system for measuring the"grain"level of cultivated land,improve the accuracy of research results,strengthen multi-scale coupling research on"point,line,plane,and volume",establish a regional collaborative governance mechanism,explore the application of 3S technology and geographic simulation,and grasp the temporal and spatial evolution and development trend of"non-grain"of cultivated land.

Studies of High-Efficiency Electrical Steels Used in Electric Vehicle Motors

Application of permanent magnet synchronous motor(PMSM) has been increasingly popular in electric vehicle(EV) area since cost-effective electrical steels were recently discovered.This paper mainly presents the performance and characteristics of EV motors using varieties of high-efficiency electrical steels.At first,the electro-magnetic and mechanical properties of electrical steels are described.Low loss,high induction and excellent mechanical strength are critical criteria to evaluate the electrical steel.However,the gage of electrical steel is a crucial factor to affect the properties.Secondly,the basic principle and algorithm for calculation of efficiency of an EV motor are explained.Finally,the modeling and experimental results for different gages of electrical steel sheets used in EV motors are analyzed.