期刊文献+
共找到7篇文章
< 1 >
每页显示 20 50 100
低效园片改种及杏李生态化栽培技术集成
1
作者 王慧珍 曲俊民 +1 位作者 张树英 王富强 《果树资源学报》 2023年第6期45-47,共3页
由生产园简单改造而来的采摘果园,存在树种品种结构简单、低效园片换种垃圾处理难、消费者对果品安全信任度不高的三大痛点,在太原南部一个采摘园,采用生态化方式将其低效核桃园片改种杏李后,成为这个采摘果园里最受欢迎、效益最好的园... 由生产园简单改造而来的采摘果园,存在树种品种结构简单、低效园片换种垃圾处理难、消费者对果品安全信任度不高的三大痛点,在太原南部一个采摘园,采用生态化方式将其低效核桃园片改种杏李后,成为这个采摘果园里最受欢迎、效益最好的园片,由此总结出低效果树垃圾堆制有机肥还园、根据不同杏李品种授粉习性进行栽植设计、杏李大穴浅栽、行间生草、自由纺锤形整形修剪和病虫害绿色防控的杏李生态化配套技术,供采摘果园解决同类问题时参考。 展开更多
关键词 低效园片 杏李 生态化栽培
下载PDF
松片园蚧防治试验 被引量:1
2
作者 何景鑫 《森林病虫通讯》 北大核心 1994年第1期27-28,共2页
松片园蚧Aonidiellapini young是湿地松及火炬松上发现的新种。40%氧化乐果对六年生湿地松采用1ml/株剂量打针防治松片园蚧具明显防治效果。也可用21%灭杀毙1000倍液在若虫孵化盛期进行喷雾防治。
关键词 防治 新种 松树
下载PDF
“天府粮仓”建设背景下成都市环城生态区耕地长效保护与实施路径研究 被引量:1
3
作者 罗明东 《中国农业综合开发》 2024年第2期20-24,共5页
粮食安全是一项关系国家经济发展的“大账本”和关乎国家安全的大战略,耕地是粮食生产的命根子。成都平原是我国重要的粮食生产区,“天府粮仓”建设对其耕地保护提出了更高要求。作为新时代打造更高水平“天府粮仓”成都片区十万亩粮油... 粮食安全是一项关系国家经济发展的“大账本”和关乎国家安全的大战略,耕地是粮食生产的命根子。成都平原是我国重要的粮食生产区,“天府粮仓”建设对其耕地保护提出了更高要求。作为新时代打造更高水平“天府粮仓”成都片区十万亩粮油产业带承载区,复垦复耕环城生态区10.1万亩耕地势在必行。笔者在开展实地走访、调研农田整治区施工标段、查阅文献、座谈交流与资料梳理等工作基础上,通过对环城生态区耕地保护工作的系统性研究,分析环城生态区耕地保护在体制机制、民生诉求、财政支撑、整治修复工作中的现实困境,并基于问题梳理给出了优化顶层设计、统筹土地收益、开展农田整治、实施生态修复等政策建议,以供参考。 展开更多
关键词 耕地保护 “天府粮仓” “一带十”建设 土地整治与生态修复 环城生态区 四川省成都市
下载PDF
半导体圆片缺陷检测技术发展趋势
4
作者 王再然 《世界电子元器件》 2000年第2期47-50,共4页
关键词 半导体 园片 缺陷检测 集成电路
下载PDF
苹果还在树上为啥就蔫了
5
作者 沈拉 王万周 +2 位作者 周吉生 周中磊 张耀峰 《西北园艺(果树)》 2019年第2期28-30,共3页
2018年苹果采收季,本应是一个让人欣喜的时节,但豫西产区一些苹果园里一个个软绵绵的“皮蛋子”苹果(图1)却让果农高兴不起来。据调查,一般果园萎蔫果率在20%左右,个别园片高达30%以上,特别是管理较为粗放的果园,土壤有机质匮乏,保水蓄... 2018年苹果采收季,本应是一个让人欣喜的时节,但豫西产区一些苹果园里一个个软绵绵的“皮蛋子”苹果(图1)却让果农高兴不起来。据调查,一般果园萎蔫果率在20%左右,个别园片高达30%以上,特别是管理较为粗放的果园,土壤有机质匮乏,保水蓄肥能力差,早在7—8月份就会出现果实失水现象,而且果实着色也很差(图2)。 展开更多
关键词 苹果 果率 水蓄 产区 着色 园片 豫西 果农
下载PDF
论证断裂力学中一个重要课题的失误
6
作者 张孝思 《北京建筑工程学院学报》 1995年第2期73-78,共6页
长期以来,有关弹性体椭园片裂缝的问题,国外(以美国为主)很多学者在20年中已陆续发表了一系列的理论成果。由于这一课题既复杂又实用,所以在断裂力学界几十年来一直享有颇高的评价,并早已载入应力强度因子手册,供全世界的设计者进行断... 长期以来,有关弹性体椭园片裂缝的问题,国外(以美国为主)很多学者在20年中已陆续发表了一系列的理论成果。由于这一课题既复杂又实用,所以在断裂力学界几十年来一直享有颇高的评价,并早已载入应力强度因子手册,供全世界的设计者进行断裂强度计算。但是,最近我们发现这些原作者的所有成果,均异曲同工的存在着从边界条件开始,全面而原则性的错误。本文引用原作者曾使用过的椭球坐标系与直角坐标系的转换关系,已给出了简要而充分的数学分析,证明他们的结论的确是有失误。 展开更多
关键词 断裂力学 弹性体 园片 裂缝 边界条件
下载PDF
From a Vernacular Photograph to an Icon: The Spirited Face of Gezi Park Resistance
7
作者 Pelin Aytemiz 《Journalism and Mass Communication》 2016年第3期134-145,共12页
During spring 2013, an important uprising had broken out and marked a historic period for political activism in Turkish memory. Focusing on the afterlives of photographic portraits produced during this “Occupy Gezi M... During spring 2013, an important uprising had broken out and marked a historic period for political activism in Turkish memory. Focusing on the afterlives of photographic portraits produced during this “Occupy Gezi Movement”, the paper considers iconized digital portraitures as a peculiar genre of vernacular photography and focuses on its visual language, and cultural codes as a part of the underground resisting culture in daily life. It explores different contexts in which photographic portraits have been used as a tool of protest and their various kinds of remediation from the Gezi Park Protest onwards. Private portraits as an agent of resistance have been creatively modified, recreated, rematerialized and circulated in distinct ways during and after the protest: from city walls as stencils, stickers, and graffiti (in actual public spaces) to Facebook profile walls as online digital re-mastering (virtual spheres). This article concentrates on aesthetics of such iconized digital photographic portraitures in contemporary Turkey. It particularly focuses on one of the instances that have labeled the Occupy Gezi Movement: the death of Berkin Elvan, who turned 15 while in a coma who has been struck in the head by a tear gas canister, fired by police, while on his way to buy bread. This case has been a catalyst for further demonstrations against Turkey's ruling party and turned Elvan's high-spirited face and dark eyebrows, to one of the strong symbols of the resistance. The teenage boy's injury during the protests, his birthday while he was in a coma at the hospital, his death, funeral and commemorations have been stress points in which his photographic portrait have been modified and redesigned according to the occasion and circulated widely. The image of the youth symbol of the struggle and the different kinds of cultural work his photograph have performed is the main focus of this research. The digital social afterlives of Elvan's iconized imagery as illustrations and drawings; as stencils and graffiti at streets; as posters and framed photographs in political performances carried around in public spaces and commemorative acts; and as digital data circulated in social media both consisting of indexical and iconic dements regarding their photographic features. This transformation of the single analog vernacular photograph of Elvan to various digital versions and continuous re-interpretation and re-materialization is discussed depending on the local history of the occasion and the critical literature on photographic history and theories of photographic vernacularity. This research makes use of data collecting methods that netnographic research methodology uses. The paper focuses on the ways local vernacularity is historically produced and evolved in this particular time of Gezi Park Resistance. 展开更多
关键词 vernacular photography Berkin Elvan Gezi Park Movement ICON Turkish history
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部