耐盐植物全日照喷雾扦插技术的研究

采用全日照喷雾扦插育苗技术对8种耐盐苗木进行扦插试验。结果表明：插穗树龄及插穗的处理是扦插成功的关键，激素处理能显提高插穗的生根率。海椹子、沙枣、柽柳和白蜡夏季扦插极易生根，且2级侧根生长旺盛时期移栽繁育为佳。采用全日照喷雾扦插技术繁育的苗木与同期用种子繁育的苗木相比，移栽后生长快、分枝多、葡匐直径大，且耐盐能力增强。     

冬季温室扦插繁殖微型月季

本文从扦插时间、苗床准备、插穗的选择与修剪、扦插前的生根处理、扦插、插后管理、病虫害防治等方面,详细介绍了微型月季扦插繁殖技术,以促进微型月季大面积推广种植.     

长柄石杉种质资源圃建设与原生境扦插实验初报

石杉科植物药用价值高,由于过度开采加之难以人工繁殖,导致资源危机.在石杉科植物种质资源圃建设的基础上,进行了长柄石杉原生境林下扦插试验研究,结果表明:原生境土壤是最合适长柄石杉扦插繁殖的基质,其次是全沙基质;春季、秋季对长柄石杉原生境(林下)扦插实验效果的影响不明显;IBA 3个浓度梯度处理中2×10-3处理的效果为最好,生根率、死亡率和平均生根量(条/插穗)表现明显优于其他处理小组;带茎尖的插穗扦插指标大部分优于茎段插穗组,说明带茎尖的插穗应该是长柄石杉扦插育苗插穗首选.     

GGR6号在杨树、柳树无性繁殖育苗中的试验研究

用GGR6号绿色植物生长调节剂处理杨树、柳树无性系扦插育苗的插穗,可提高扦插育苗的成活率.欧美107杨树插穗以20mg.kg-1的浓度处理16h,成活率分别比倒置催根和直接扦插的高15%和62.5%;苗木合格率分别提高5%和50%.金丝柳树插穗以50mg.kg-1的浓度处理效果明显,其扦插育苗的成活率比对照提高了30%.     

正交试验设计在金银花扦插生根条件优化中的应用研究

采用正交试验设计的方法,针对与金银花扦插生根相关的主要因素进行了综合比较。研究结果显示:影响金银花扦插生根的主要因素是插穗木质化程度、IAA浓度、NAA浓度与基质土壤组成,各因素的最佳组合为:半木质化插穗、100 mg/l的IAA、200 mg/l的NAA、基质土壤(泥碳土:沙:羊粪比为6:3:1),在此实验条件下,金银花插穗成活率达92%。半木质化插穗生根数最多;未木质化插穗,愈伤组织形成快,但生根数最少。基质组成对金银花插穗生根数有重要的影响,基质土壤越疏松,越有利于扦插生根。在适宜的外界环境中,插穗内部营养物质与外部的生长调节剂协同作用于金银花的插穗生根过程,施加合适的外部诱导条件能有效地提高金银花插穗成活率。     

水松扦插繁殖技术的研究

水松为我国特有的珍稀濒危树种。本研究对水松扦插繁殖技术进行了探讨。通过研究母树年龄,采条部位,扦插基质,激素种类、浓度与处理时间,基因型等因素对水松扦插成活率的影响,初步总结出一套水松扦插繁殖技术。以1a生或2a生实生苗顶部枝条为插穗,用2000ppmIBA速蘸处理30s或用100ppmNAA浸泡插穗基部2h,然后扦插在混合基质（草炭：珍珠岩=7：3）中,可以获得较为理想的结果,扦插成活率可达85％以上。试验还发现,不同基因型间生根能力差异显著,表明通过优良单株选择可改良水松的生根特性。     

红豆杉扦插繁育技术研究

红豆杉是红豆杉科Taxaceae红豆杉属Taxus植物的总称。为更好地保护和合理开发利用红豆杉,我们从2000年开始从事红豆杉扦插繁育技术研究。研究证明：①扦插深度以5 cm为宜,过深易使插穗基部腐烂;②激素处理在红豆杉扦插育苗中非常重要,用ABT 1号生根粉50μg/g处理的插穗生根效果最好;③使用70%的黑色塑料遮荫网进行遮荫,可有效减少水分蒸发,对红豆杉生根有利。④选取二至三年生枝条的中上部作插穗,成活率较高。     

苏柳172育苗技术研究

在立地条件、管理措施、插条质量相同的条件下,以苏柳172为试材,研究不同扦插时间、扦插密度、插穗长度对苗木质量的影响.试验结果表明:苏柳172在黄河故道区育苗,以每年的12月5日前后扦插、13～15 cm的插穗长度、25×60 cm扦插密度进行扦插育苗效果最好,可以达到既节约种条又能培育优质苗的目的.     

不同基质对天竺葵扦插效果的影响

扦插基质是决定插穗在生根过程中能否正常生根的关键因素,为了确定合适的扦插基质。本试验以天竺葵为指示植物,研究了6种基质对插穗生根的影响。结果表明：单独使用珍珠岩、蛭石和腐叶土作为扦插基质,不利于天竺葵的生根发育;两种物质相互配合作为基质,效果稍好;但是珍珠岩、蛭石和腐叶土体积比1：1：1混合物是天竺葵扦插最佳的基质．     

红豆杉扦插初期试验分析

为探索中国红豆杉的快繁技术,以其10年树龄红豆杉2年生、3年生、4年生插穗枝条为试验材料,在3种不同的基质中进行扦插,以150mg/L的吲哚丁酸(IBA)溶液对扦插枝条进行处理.在扦插初期初步探索出适合中国红豆杉的最佳扦插基质及插穗枝条.结果表明:扦插基质为森林腐殖土、园土、河沙(1:1:1)混合基质时,成活率最高,尤其是3年生枝条,能达到90%以上,而在对照组河沙基质中成活率仅在50%左右,芽萌动期都为19天左右,生根期为70天左右.新梢生长量在扦插后的第二个月都达到高峰期.     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

库克斯顿城堡

城堡, 是欧洲典型的建筑之一, 每个城堡都有一个美丽的传说或是一段历史。从本期开始, 我们将推出“城堡之旅”, 带各位读者去浏览、观赏欧洲各地的城堡, 开始一段文化与历史的旅途!     

The Reader Response Approach to Teaching of English Literature

During interview with English majors, it was found that a majority of students expressed disappointment with their experience of English literature classes. Students' dislike of learning English literature appears to be the major problem of teaching English literature in China. Reader response approach is a good way to solve this problem. In this paper, I explain the rationale behind the reader response approach, such as its origin, definition, features, assumptions, and strategies. Then I illustrate how reader response approach works as a teaching strategy by presenting several teaching models. At last I evaluate its usefuiness for teachers and present the advantages of reader response approach in Chinese context.