Production Performance and Development Strategies of Double-cropping Rice in Hunan Province

ln the research, an empirical analysis was performed on production per-formance and influential factors of rice in Changsha County and Liling City. The re-sults showed that production scale has been closely linked to age and education level of farmers. The larger scale, the higher comprehensive performance, but rele-vant efficiency tends to be lower. Sowing area and yield per unit area are major in-fluential factors of production performance of double-cropping rice, but the rest influ-ential factors are different upon production scale. Final y, developmental strategies are proposed for development of double-cropping rice.

Goals and Key Technology of Fertilizer-pesticide "Double Reduction" and Synergism for Greenhouse Strawberry

In order to develop green good, reduce the use of chemical fertilizer and pesticide, realize ＂double reduction＂ and synergism, improve safety and quality of products, protect the ecological environment and promote the healthy and steady development of strawberry industry, the goals and key technology of fertilizer-pesticide ＂double reduction＂ and synergism for greenhouse strawberry are summed up in this paper targeting at the current situation of strawberry production and combined with the new technology achievements at home and abroad. The key technology includes six items： healthy seedling cultivating technique, soil improvement and continuous cropping obstacle treatment technique, agricultural ecological prevention tech- nique, physicochemical trap of pest control technique, biological control technique and low residual risk chemical control technique.

我国英文科技期刊中作者国际化程度分析

【目的】分析我国英文SCI科技期刊中作者国际化占比的现状,促进其国际化发展。【方法】以入选"中国科技期刊卓越行动计划"领军和重点期刊类项目的 51种期刊为研究对象,统计期刊的基本情况并研究其国外作者论文占比以及美国、英国、德国和日本等国家作者的发文比例,阐述期刊刊名、与国际出版商合作、OA出版形态等因素对期刊国际化水平的影响,探讨国外作者独著占比与期刊国际影响力的关系。【结果】这些期刊中国外作者独著占比整体较高,国外作者主要来源于美国、德国、英国等;普遍存在整体载文量低、出版规模小等问题。【结论】建议我国英文科技期刊从吸引世界杰出学者为期刊作者,影响因子和载文量"双效"发展,以及探索国际传播新方式等方面加强建设,加速国际化发展。