Improving cultivated land use eco-efficiency(CLUE)can effectively promote agricultural sustainability,particularly in developing countries where CLUE is generally low.This study used provincial-level data from China t...Improving cultivated land use eco-efficiency(CLUE)can effectively promote agricultural sustainability,particularly in developing countries where CLUE is generally low.This study used provincial-level data from China to evaluate the spatiotemporal evolution of CLUE from 2000 to 2020 and identified the influencing factors of CLUE by using a panel Tobit model.In addition,given the undesirable outputs of agricultural production,we incorporated carbon emissions and nonpoint source pollution into the global benchmark-undesirable output-super efficiency-slacks-based measure(GB-US-SBM)model,which combines global benchmark technology,undesirable output,super efficiency,and slacks-based measure.The results indicated that there was an upward trend in CLUE in China from 2000 to 2020,with an increase rate of 2.62%.The temporal evolution of CLUE in China could be classified into three distinct stages:a period of fluctuating decrease(2000-2007),a phase of gradual increase(2008-2014),and a period of rapid growth(2015-2020).The major grain-producing areas(MPAs)had a lower CLUE than their counterparts,namely,non-major grain-production areas(non-MPAs).The spatial agglomeration effect followed a northeast-southwest strip distribution;and the movement path of barycentre revealed a"P"shape,with Luoyang City,Henan Province,as the centre.In terms of influencing factors of CLUE,investment in science and technology played the most vital role in improving CLUE,while irrigation index had the most negative effect.It should be noted that these two influencing factors had different impacts on MPAs and non-MPAs.Therefore,relevant departments should formulate policies to enhance the level of science and technology,improve irrigation condition,and promote sustainable utilization of cultivated land.展开更多
“十三五”期间中医药发展迎来了利好时机。通过对2016—2020年中国期刊全文数据库(CJFD)和Web of science(WOS)的黄精相关全部文献进行检索,分别从文献年代、期刊来源、主要研究地域、第一科研机构、主题和关键词等角度进行统计分析,...“十三五”期间中医药发展迎来了利好时机。通过对2016—2020年中国期刊全文数据库(CJFD)和Web of science(WOS)的黄精相关全部文献进行检索,分别从文献年代、期刊来源、主要研究地域、第一科研机构、主题和关键词等角度进行统计分析,利用文献计量工具VOSviewer研究文献关键词共现网络特性来把握“十三五”期间黄精科学研究现状。结果表明,黄精研究主要在国内,与其产地分布关系较密切。研究主题广泛,药材资源为论文发表量最多的主题,已形成较为稳定的研究机构和团队。尽管“十三五”期间,论文量呈先上升后下降再回升的趋势,与“十一五”和“十二五”相比,“十三五”期间论文发表量明显增加,并更多地关注黄精生态种植、单一化合物的分离和药效研究等。但黄精仍存在种子规模化繁育滞后、质量评价体系不健全、产品创新性不足等问题。有针对性地加强黄精种子休眠和萌发特性、多指标评价方法和新颖产品的研发可助力黄精产业的可持续发展。展开更多
基金supported by the National Natural Science Foundation of China(72373117)the Chinese Universities Scientific Fund(Z1010422003)+1 种基金the Major Project of the Key Research Base of Humanities and Social Sciences of the Ministry of Education(22JJD790052)the Qinchuangyuan Project of Shaanxi Province(QCYRCXM-2022-145).
文摘Improving cultivated land use eco-efficiency(CLUE)can effectively promote agricultural sustainability,particularly in developing countries where CLUE is generally low.This study used provincial-level data from China to evaluate the spatiotemporal evolution of CLUE from 2000 to 2020 and identified the influencing factors of CLUE by using a panel Tobit model.In addition,given the undesirable outputs of agricultural production,we incorporated carbon emissions and nonpoint source pollution into the global benchmark-undesirable output-super efficiency-slacks-based measure(GB-US-SBM)model,which combines global benchmark technology,undesirable output,super efficiency,and slacks-based measure.The results indicated that there was an upward trend in CLUE in China from 2000 to 2020,with an increase rate of 2.62%.The temporal evolution of CLUE in China could be classified into three distinct stages:a period of fluctuating decrease(2000-2007),a phase of gradual increase(2008-2014),and a period of rapid growth(2015-2020).The major grain-producing areas(MPAs)had a lower CLUE than their counterparts,namely,non-major grain-production areas(non-MPAs).The spatial agglomeration effect followed a northeast-southwest strip distribution;and the movement path of barycentre revealed a"P"shape,with Luoyang City,Henan Province,as the centre.In terms of influencing factors of CLUE,investment in science and technology played the most vital role in improving CLUE,while irrigation index had the most negative effect.It should be noted that these two influencing factors had different impacts on MPAs and non-MPAs.Therefore,relevant departments should formulate policies to enhance the level of science and technology,improve irrigation condition,and promote sustainable utilization of cultivated land.
文摘“十三五”期间中医药发展迎来了利好时机。通过对2016—2020年中国期刊全文数据库(CJFD)和Web of science(WOS)的黄精相关全部文献进行检索,分别从文献年代、期刊来源、主要研究地域、第一科研机构、主题和关键词等角度进行统计分析,利用文献计量工具VOSviewer研究文献关键词共现网络特性来把握“十三五”期间黄精科学研究现状。结果表明,黄精研究主要在国内,与其产地分布关系较密切。研究主题广泛,药材资源为论文发表量最多的主题,已形成较为稳定的研究机构和团队。尽管“十三五”期间,论文量呈先上升后下降再回升的趋势,与“十一五”和“十二五”相比,“十三五”期间论文发表量明显增加,并更多地关注黄精生态种植、单一化合物的分离和药效研究等。但黄精仍存在种子规模化繁育滞后、质量评价体系不健全、产品创新性不足等问题。有针对性地加强黄精种子休眠和萌发特性、多指标评价方法和新颖产品的研发可助力黄精产业的可持续发展。
