畜禽场排出空气的净化技术

详细介绍了当前国内外对畜禽场排出空气的主要净化技术和性能,对技术的设计原理、材料选择与净化效果进行了分析评价。     

Characterization of Acidovorax citrulli strains isolated from solanaceous plants

Acidovorax citrulli is the causal agent of bacterial fruit blotch disease of cucurbits. Strains of this pathogen are distributed into two major groups: Group I strains have been mainly isolated from melon and other non-watermelon cucurbits, while Group II strains have been mainly recovered from watermelon. Here we report the characterization of strains T1 and EP isolated from diseased tomato and eggplant plants, respectively, and further confirmed to belong to A. citrulli species. Based on PCR, PFGE, and rep-PCR, these strains showed high similarity to the Group II strain 7a1. Sequencing and comparative analyses revealed that the genomes of T1 and EP aligned with that of the Group II model strain AAC00-1, over 97.88% and 99.22%, respectively. The virulence of T1, EP, and 7a1 determined on tomato, eggplant, and watermelon was similar and significantly higher than that of Group I strain M6. In contrast, M6 was more virulent on melon. Expression levels of seven virulence genes measured 24 hr after inoculation of tomato, eggplant, watermelon, and melon showed that the expression pattern was generally similar in strains 7a1, T1, and EP, whereas for M6 the expression was high only on melon. Overall, our results indicate that the solanaceous strains belong to Group II. To the best of our knowledge, this is the first study that reports characterization of A. citrulli strains isolated from solanaceous species. The fact that A. citrulli is able to naturally colonize and cause disease in non-cucurbit crops poses additional challenges for management of this important pathogen.     

华北地区设施蔬菜生产技术存在问题及对策

随着设施蔬菜生产面积的扩大,华北地区蔬菜产业迅猛发展,设施蔬菜生产技术中出现了一些新的问题。以河北邯郸地区为例,从设施结构、品种选择、栽培和管理技术、合理施肥、病虫害防治几个方面综述了近几年华北地区设施蔬菜生产技术存在的问题,并提出了相应的对策,有利于促进华北地区设施蔬菜产业健康、稳定发展。     

竹碎料板生产技术

竹碎料板是以竹质碎料为主要原料,施加一定量的胶粘剂,经成型、热压而制成的竹质人造板材。发展竹碎料板生产是工业性开发利用杂竹资源的有效途径之一,也可利用竹材加工剩余物以提高竹材综合利用率。本文介绍竹碎料板生产的主要工艺流程及工艺要点。     

Values,technologies, and epistemology

The aim of this paper is to make possible dialogue between those who claim that technologies are coded with social, political, or ethical values and those who argue that they are value-neutral. To demonstrate the relevance of this bridge-building project, the controversy regarding agrifood biotechnology will be used as a case study. Drawing on work by L. H. Nelson about the nature of human knowledge-building enterprises and E. F. Kittay’s account of the relationally-constituted self, the argument will be made that all technologies embody the values of the communities that created them. Zahra Meghani is an assistant professor in the Department of Philosophy at the University of Rhode Island. Her research interests are philosophy of technology, feminist theory (especially feminist epistemology and feminist philosophy of science), normative ethics, practical ethics (especially health care ethics), disability issues, and political theory.     

淄博市大力推广秸秆综合利用的几种模式

介绍了淄博市大力推广秸秆综合利用的几种模式,主要包括：秸秆深耕还田、秸秆反应堆、秸秆养藕、沼气利用等技术,对全市的秸秆综合利用工作有一定程度的推动作用。     

Use of Information and Communication Technologies for Agricultural Teaching and Research in Universities in Enugu State,Nigeria

This study examined the use of Information and Communication Technologies (ICTs) for agricultural teaching and research in universities in Enugu State, Nigeria. Results show that almost all the respondents (lecturers 96.9%, students 90%) had acquired ICT training. Computers, GSM/telephone, photocopying machines, e-mail, flash drives, printers and Internet were the most frequently used ICTs. The age of the lecturers was the most important factor that significantly influenced the frequency of computer usage for teaching and research (P ≤ 0.05).     

皖南双季稻区烟稻轮作生态环境的配套技术研究

本文通过对K326、RGH51两个烤烟品种不同移栽期、不同施氮水平及配比试验研究,结果表明:皖南双季稻区烟稻轮作生态环境[1]中等肥力田块,烤烟生产以3月25—4月8日期间移栽到大田,施化学纯氮97.5-105kg/hm2,N:P2O5:K2O=1:1-1.5:3等为宜,既可保证上部叶充分成熟采烤,获得优质适产,又能适时腾茬栽插晚稻,科学地解决烟稻争茬矛盾,能充分地利用皖南烟区温光资源,获得烟稻轮作双丰收。     

长汀青豆腐竹的加工工艺

为改变腐竹品种单一,丰富腐竹品种,试验在传统工艺的基础上进行改良,充分利用资源优势、传统习惯,研发出以本地特有的青皮豆为原料的新型腐竹,具有蛋白质含量更高、豆香味更浓郁、口感更好的特点,一经上市即获得广大客户的喜爱。     

福建省马尾松繁育技术探讨

马尾松是福建省广泛分布的树种之一,在福建地区的工业利用价值极高。近年来,马尾松的用材需求与日俱增,如何快速、高效、低成本的培育苗木,满足市场的需求,已经成为广大林业工作者需要考虑的问题。笔者针对当前福建地区马尾松的基本情况,提出在福建地区推广快速育苗的方法,供实践借鉴。