稻米：一百年,一千年,一万年

大致说来,一万年前是中国稻作的起源时期,一千年前则是中国稻作传统的形成时期,而最近一百年则是中国稻作发展最快的时期。用一百年、一千年、一万年这三个大致的时间节点,全景展示中国稻米的历史、稻米对于国计民生的重要性、千百年来中国人民为解决吃饭问题所做的努力、近百年来中国稻作科技的发展与进步,展望未来稻米所可能遇到的挑战和前景。     

Impact of climate change on maize yield in China from 1979 to 2016

Climate change severely impacts agricultural production, which jeopardizes food security. China is the second largest maize producer in the world and also the largest consumer of maize. Analyzing the impact of climate change on maize yields can provide effective guidance to national and international economics and politics. Panel models are unable to determine the group-wise heteroscedasticity, cross-sectional correlation and autocorrelation of datasets, therefore we adopted the feasible generalized least square(FGLS) model to evaluate the impact of climate change on maize yields in China from 1979–2016 and got the following results:(1) During the 1979–2016 period, increases in temperature negatively impacted the maize yield of China. For every 1°C increase in temperature, the maize yield was reduced by 5.19 kg 667 m–2(1.7%). Precipitation increased only marginally during this time, and therefore its impact on the maize yield was negligible. For every 1 mm increase in precipitation, the maize yield increased by an insignificant amount of 0.043 kg 667 m–2(0.014%).(2) The impacts of climate change on maize yield differ spatially, with more significant impacts experienced in southern China. In this region, a 1°C increase in temperature resulted in a 7.49 kg 667 m–2 decrease in the maize yield, while the impact of temperature on the maize yield in northern China was insignificant. For every 1 mm increase in precipitation, the maize yield increased by 0.013 kg 667 m–2 in southern China and 0.066 kg 667 m–2 in northern China.(3) The resilience of the maize crop to climate change is strong. The marginal effect of temperature in both southern and northern China during the 1990–2016 period was smaller than that for the 1979–2016 period.     

我国饲料工业发展概况

本文对我国饲料工业发展现状、存在问题、措施及对策三个方面进行了综述。     

苏北滨海盐土区杉木生态适应性及栽培技术的研究

调查研究结果表明，盐城市滨海盐土区与杉木中心产区的气候因子比较接近，基本适宜杉木的生长，杉木造林选择地下一在１．５ｍ以下，排水良好的采伐更新迹地并采用 栽植法效果较好。新造幼林套种作物以棉花最好。     

绵羊慢病毒自然感染绵羊的硬化性淋巴细胞性乳腺炎

７头来自新疆南部某绵羊慢病毒（ＯｖＬＶ）感染的羊场的绵羊用于本研究。用琼脂凝胶免疫扩散检查绵羊血清中对绵羊进行性肺炎（ＯＰＰ）病毒（ＯＰＰＶ）的抗体，结果表明有６例呈阳性，１例阴性，抗体效价在３年中呈下降趋势。４例血清学阳性边菜羊和１例阴性和田羊有不同程度的硬化性（纤维性）淋巴细胞性乳腺炎，小叶内有不等的淋巴细胞浸润，导管周围无淋巴滤泡形成，小叶间大量纤维组织增生。７例的肺、脑、关节、血管均无ＯｖＬＶ性特异性病变。从血清学阳性羊的外周血白细胞中未分离到ＯｖＬＶ。     

绵阳城市广场建设中的特色分析

在调查的基础上，介绍了四川绵阳市的广场，并以铁牛广场为例分析其特色和不足。     

花粉多糖注射剂质量标准中几个项目测定

根据中国药典对注射剂的要求,对花粉多糖的蛋白质、鞣质、树脂、草酸盐、炽灼残渣、钾离子、砷盐、重金属含量进行测定,均符合规定,达到质量标准。     

东南丘陵区旱地耕作制度的类型、模式及关键技术

东南丘陵区旱地耕作制度主要包括多熟种植、轮作换茬和复地连作等三大类型,每一类型含有多种种植模式。为实现旱地耕作制度的高产、稳产和持续增产,东南丘陵区在发展旱地农业时主要采取了以下9项配套关键技术：（1）坡改梯田建设与综合治理技术;（2）集径流蓄水与节水灌溉技术;（3）培肥土壤与以肥调水技术;（4）深耕细作与保护性耕作技术;（5）抗耐旱作物与品种的选用及配套技术;（6）秸秆覆盖与地膜栽培技术;（7）丰产沟与丰产坑耕作技术;（8）旱地错季适应栽培技术;（9）化学制剂在旱作农业中的应用技术。     

中国竹产业在乡村振兴中的发展对策

中国竹资源丰富,竹业是山区农民的重要经济来源。随着科技的进步,中国竹产业发展取得了很大进步,但在乡村地区竹产业的优势和潜力尚未充分发挥。当前,中国“三农”工作的重心已转向全面推进乡村振兴,竹资源丰富地区也成为乡村振兴的主要战场,竹产业在乡村振兴中大有可为。文章分析了中国竹产业发展现状以及乡村地区竹产业发展存在的问题,提出了竹产业服务于乡村振兴的对策。