保山市隆阳区小春作物种植结构调整方向及对策

阐述了保山市隆阳区小春作物种植结构调整的必要性,分析了调整中存在的问题,并总结了其调整方向及对策,以期为该区小春作物结构的调整提供参考。     

Boron in plants and animals: Is there a role beyond cell‐wall structure?

The role of boron (B) as a structural element of plant cell walls and its implications for plant growth have been well established. However, increasing evidence suggests one or more functions of boron beyond cell‐wall structure. This evidence arises from studies conducted with a large variety of organisms, such as plants, animals, and bacteria. In animals, embryogenic development seems to depend on adequate boron supply, and cell lines with a knockout of the Na⁺‐coupled boron transporter NaBC1, the mammalian homolog of Arabidopsis thaliana boron transporter AtBor1, stop to develop and proliferate. In bacteria, boron is an essential part of a signal molecule required for quorum sensing. This review aims to summarize some recent advances from plant, animal, and microbiological research related to the functions of boron and to highlight open questions for further research.     

国内外毛皮市场现状及我国建立国际毛皮拍卖市场的必要性

主要综述了我国毛皮动物养殖业的资源优势,毛皮动物生产、贸易、销售及裘皮消费市场的现状,同时介绍了国内外毛皮拍卖市场的现状,提出了我国建立国际毛皮拍卖市场的必要性。     

阜南县玉米收获机械化发展存在的问题及对策

分析了阜南县推广玉米收获机械化的必要性及存在的问题,并提出了发展对策,以期为推广先进适用的玉米收获机械提供参考。     

风景游憩林斑块抚育法研究

风景游憩林的景观基础是森林健康与近自然,其抚育因城、因地、因林而异;风景游憩林斑块抚育法以目标森林斑块为抚育作业单元,以斑块重要性评价、林木等级评价为关键步骤,以单株标号、单株择伐、丛(团、块)状择伐、定位补植为主要措施,具有较强的针对性与较高的灵活度。