CAJ | 학술논문

　　为了分析省级农用地分等成果转化为国家级成果方法的科学性，该文以西部12省农用地分等汇总数据库为基础，采用所抽取的13302个调查样点，建立了各省省级利用等指数与标准粮产量的回归方程，运用平衡转换的方法，完成了各省省级成果向国家级成果的转换，并采用西部区1088块省级标准样地属性数据对转换结果进行模型验证。研究结果表明：采用平衡转换的方法将西部区耕地划分为12个国家级利用等别，等别范围为4～15等；采用标准样地（样点外）对转换模型进行验证，模拟标准粮产量与实际标准粮产量之间相关性较高（R2≥0.64， n≥45）；基于耕地生产能力的平衡转换方法实现了宏观尺度上的省级农用地分等成果向国家级成果的转化；实现了省级和国家农用地分等成果的分级使用，有利于农用地质量的分级管理，为深化不同尺度的农用地分等成果的应用提供科学依据。
　　위료분석성급농용지분등성과전화위국가급성과방법적과학성，해문이서부12성농용지분등회총수거고위기출，채용소추취적13302개조사양점，건립료각성성급이용등지수여표준량산량적회귀방정，운용평형전환적방법，완성료각성성급성과향국가급성과적전환，병채용서부구1088괴성급표준양지속성수거대전환결과진행모형험증。연구결과표명：채용평형전환적방법장서부구경지화분위12개국가급이용등별，등별범위위4～15등；채용표준양지（양점외）대전환모형진행험증，모의표준량산량여실제표준량산량지간상관성교고（R2≥0.64， n≥45）；기우경지생산능력적평형전환방법실현료굉관척도상적성급농용지분등성과향국가급성과적전화；실현료성급화국가농용지분등성과적분급사용，유리우농용지질량적분급관리，위심화불동척도적농용지분등성과적응용제공과학의거。
China, the fastest developing country with the highest population in the world, is undergoing the most rapid industrialization and urbanization in the human history. Thus, the country faces multiple challenges of food insecurity including conversion of prime agricultural land to urban encroachments, limited land resources available for crop production, lack of adequate amounts of fresh water for irrigation and urbanization/industrialization, and increasing risks of climate change and the associated extreme events. Therefore, how to accurately evaluate the potential productivity of arable land at the present technology at national level is very important to identifying yield gap of arable land, and to regulating scientific policy to close yield at national level. China has accomplished arable land grading at national level, and the accomplishments of Chinese national arable land grading at plot level not only pushed the advance in the science and technology of land evaluation, but also provided accurate data basis for management of arable land protection in China based on arable land quantity and quality. The key technique developed in the accomplishment of Chinese national arable land grading was adopted in the arable land grade transferring from provincial to national level. Thus, analyzing the accuracy of the method is very important for identifying the scientific method and providing useful tool for the arable land grading at different levels. The database of arable land grade in 12 provinces and the standard crop yields from a sample of 13,302 at plot level were employed to the compared analysis. The results presented in the article indicated the following:1)the balance transferring method based on the standard crop yields of arable land could fulfill the achievements in arable land grade conversion from provincial to national level;2) the accuracy of the arable land grade at provincial level was the principal result of this method; 3) the scientific calculation of the standard crop yields of arable land was critical factor to the accuracy of the method;4) the accomplishments of arable land grade in the western of 12 provinces at national level were in accordance with the characteristics of distribution of productivity of arable land. The method of the balance transferring based on the standard crop yields of arable land grade could be used for different levels such as county’s and provincial levels.