香蕉新品种‘南天红’

香蕉新品种‘南天红’由‘南天黄’的自然突变选育而成。假茎平均高度2.59 m，幼树假茎外表面暗红色，抽蕾后转绿。雄花苞片外表面常为深红色，花苞卷曲，常不脱落；从种植到收获11 ~ 13个月，单株产量25 kg，品质好。中高抗香蕉枯萎病4号小种，采用配套的栽培技术可在所有香蕉种植区推广。     

天敌昆虫低温贮藏研究进展

在农业生产中由于化学农药的长期不合理使用,导致"3R"问题持续存在和人类赖以生存的环境日益恶化,生物防治产品及技术在有害生物综合治理中的作用越发重要。天敌昆虫的生长发育及存活期往往很短,探索其储存技术是天敌昆虫规模化生产中的关键性环节。低温贮藏可以延长天敌昆虫的寿命,进而可以为生物防治提供充足、稳定的天敌产品。因此,天敌昆虫低温贮藏一直是生物防治领域研究的热点。本文围绕天敌昆虫低温贮藏这一环节,就低温诱导天敌昆虫滞育虫态、冷驯化对昆虫低温贮藏效果的影响、低温贮藏对天敌昆虫适合度(寿命、羽化率、性比、个体尺寸大小、飞行扩散能力等)的影响等方面进行综述,以期为天敌昆虫产品的规模化生产及应用技术提供参考。     

Soil protection for a sustainable future: options for a soil monitoring network for Ireland

The increased recognition of the importance of soil is reflected in the UN Post‐2015 Development Agenda with sustainable development goals that directly and indirectly relate to soil quality and protection. Despite a lack of legally binding legislation for soil protection, the European Commission remains committed to the objective of soil protection. However, the achievement of a legally binding framework for soil protection relies on the implementation of a soil monitoring network (SMN) that can detect changes to soil quality over time. As beneficiaries do not pay for the provision of soil information, the options for soil monitoring are limited. The use of existing data sets should be considered first. Using Ireland as an example, this research explored the opportunities for a SMN for Ireland considering three existing national data sets. The options for a SMN are considered in terms of their spatial and stratified distribution, the parameters to be measured and an economic analysis of the options proposed. This research finds that for Ireland, either a 10 or a 16 km² grid interval stratified by land use and drainage class offers the best potential in relation to the spatial distribution of existing data sets to reflect local data at a national level. With existing data, the stratified SIS data using the 16 km² grid offers the best value for money, with baseline costs for analysis, excluding field costs, of between €706 481 and €2.8 million. Acknowledging the impossibility of measuring all parameters with ideal frequency, this study proposes a two‐tier system for optimized monitoring frequency. Parameters must anticipate future policy requirements. Finally, the implementation of a SMN must be accompanied by standardized methods, defined thresholds and action mandates to maintain soil quality within allowable limits.     

低、无毒农药防治花灌木主要刺吸式口器害虫

在查清天津市园林主要花灌木刺吸口器害虫桃粉蚜、绣线菊蚜、棉蚜和山楂红蜘蛛发生消长规律的基础上 ,确定了防治适期和结合点 ,筛选出 10 %吡虫啉、绿灵、蚧螨灵、 1. 8%齐螨素和花保5种低、无毒药剂 ,防效均达到 90 %以上。查出天敌 13种 ,并对优势种作了取食量调查     

槟榔红色素的抗氧化活性

测定槟榔红色素(areca red pigment,AP)对 DPPH·和·OH的清除能力、对脂质体过氧化的抑制能力、对Fe2+的络合能力,并测定其还原能力.结果表明:槟榔色素对DPPH·、·OH的清除能力较强:对脂质体过氧化的抑制能力很强,抑制率高达79.84%;与VE、没食子酸(gallic acid,GA)、BHT相比,槟榔色素的还原力、对Fe2+的络合能力较弱.说明槟榔红色素是较好的抗氧化剂.     

河北省天然草地禾本科植物的生活型、生态型及区系分析

对河北省天然草地禾本科植物的生活型、生态型及区系特征进行了分析，结果表明，多年生草本为优势生活型，占78．4％；生态型以中生植物为主，占77．2％，旱生植物占16．0％，湿生植物仅占6．8％；植物区系成分多样，温带分布属最多达42属，占总属数的57．5％，其次为热带分布属，有24属，占32．9％。     

输气管道水化物堵塞的预防和处理

阐述了输气管道内水化物的成因，特性及游离水的来源，并对其进行了分析，根据分析结果，给出了预测管道内水化物形成区域的方法，提出了三项预防水化物的措施，（1）施工阶段避免过多使用弯管，（2）投产前增加吹扫次数，彻底清除水，（3）运行初期定期注入抑制剂，指出对已形成水化物的管道段，可采取尽快降低运行压力，加热，注醇和放空等措施进行处理。     

负刚度的工作原理及应用初探

This paper deals with the vibration isolation principle of a system with a negative stiffness spring and the energy analysis for this system.As an application of the method, an example of vibration systems with equal frequencies is given. It shows that th     

我国减灾农业发展的形势和对策

我国农业减灾面临严峻形势，每年发生的农业灾害都造成重大损失，通过发展减灾农业才能确保我国社会经济持续稳定地增长。我国农业减灾系统建设己初见成效，今后的主要任务是进一步完善农业减灾系统的结构和功能，提高农业减灾的技术水平，加强灾害教育工作，增加减灾资金投入。     

天然气发动机怠速鲁棒控制

将H∞鲁棒控制理论应用于天然气(CNG)发动机的怠速控制,建立了CNG发动机动力学模型,描述了发动机的不确定性.应用Matlab鲁棒控制工具箱,设计出基于H∞理论的CNG发动机怠速控制器,并进行了仿真分析和试验.仿真和台架试验表明,H∞控制具有很好的鲁棒性,提高了CNG发动机怠速工况的稳定性.