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1.
2016年10月—2017年6月,在关中中部灌区的三原县采用两因素二次D饱和最优设计,研究了不同播期和种植密度对农大399小麦产量和品质的影响.结果表明:不同播期和密度对农大399小麦群体数量、个体质量、产量及其结构和籽粒品质均有显著的影响.同一播期,群体随着密度的增加而增加,叶龄、单株分蘖和次生根分别降低5. 4%~16. 9%、10. 7%~19. 2%和9. 8%~30. 4%,成穗数提高3. 9%~7. 0%,穗粒数降低0. 5%~0. 6%,千粒重提高3. 8%~6. 1%;增产1. 9%~8. 3%,籽粒蛋白质、湿面筋、稳定时间和沉降值分别提高3. 9%~9. 9%、6. 5%~11. 2%、14. 5%~16. 8%和2. 4%~12. 9%,其他品质指标变化不大.同一密度情况下,群体随着播期的推迟降低3. 6%~8. 8%,越冬期叶龄、单株分蘖和次生根均显著降低,个体质量显著变差;成穗数和穗粒数分别降低1. 1%~8. 9%和1. 1%~4. 5%,千粒重增加1. 9%-3. 8%,减产3. 7%-13. 6%;籽粒蛋白质、湿面筋、稳定时间和沉降值较早播依次降低2. 9%~7. 0%、3. 3%~5. 1%、12. 4%~18. 1%和1. 4%~6. 1%,但对籽粒面粉和拉伸品质指标影响不显著.当目标产量在8 250 kg/hm~2~9 750 kg/hm~2时,农大399适宜播种期为10月7日~10月15日,适宜播种密度为2. 30×106株/hm~2~2. 89×106株/hm~2.  相似文献   

2.
采用微波消解-AAS法测定了制作六味地黄丸的六种中草药中的十种微量元素,对微波消解试剂、消解条件及测定时的干扰情况进行了详细研究.以茯苓样品为例,测得回收率分别为:Zn 120.5%,Fe 106.8%.Mn 118.5%,Co 99.9%,Ni 95.5%.Cu 100.4%,Cr 106.1%,Ca101.5%,Mg 90.5%和K 120.0%.样品测定结果的相对标准偏差在0.17%~7.87%之间,测定方法快速、简便,结果准确可靠.  相似文献   

3.
一、问题的提出 据专家介绍(http://northtimes.39.net.cn),目前,儿童心理问题的发病率为12%至16%,患有心理疾病的儿童为2%左右.据沈阳市的儿童问题专家介绍,仅沈阳市就有10多万儿童存在着各种各样的心理问题.据文教育儿网公布的国内外有关调查显示,幼儿心理疾病发病的几率高达10%~15%;新华网济南5月2日电,山东省近期一项抽样调查表明,每8个儿童中就有一个存在心理与行为问题;还有研究者对5-6岁的儿童进行了抽样调查,调查结果显示:脾气坏占15.72%,性格古怪占4.84%,神经质占28.33%,行为问题占9.02%,社会交往不良占2.86%.情绪障碍占10.33%.低能占0.66%.  相似文献   

4.
穴位注射埋线治疗慢性非细菌性前列腺炎临床观察   总被引:1,自引:0,他引:1  
目的:寻找一种疗效确切,价格低廉,易于患者接受的治疗方法.方法:将90例诊断为慢性非细菌性前列腺炎(CNP)的患者进行为期2个月的对照单盲实验,评价其效果.结果:治疗组治愈率63%,显效率27%,有效率10%,无效0%.对照组治愈率31.7%,有效率14.3%,显效率31%,无效23%.经x2检验,治愈率和总体疗效均P<0.01.结论:穴位注射埋线治疗CNP具有疗效显著,经济方便,易于患者接受的特点.  相似文献   

5.
选择 35日龄新西兰白兔 2 5只 ,随机分成A、B、C、D、E五组 ,A、B、C、D组为试验组 ,E组为对照组。试验组分别添加 0 .1 % ,0 .3%和 0 .5 %、0 .7%资源复合酶 ,研究不同水平的复合酶对断乳肉兔的生长性能的影响。结果表明 ,在饲料中添加复合酶制剂 ,试验组与对照组相比 ,试验组日增重分别提高 1 8.61 %、2 0 .73%、2 0 .95 %、2 0 .80 % ,经生物统计方差分析和SSR法多重比较 ,差异极显著 ,而组间差异不显著 ;料重比分别下降 2 6.2 7% (P <0 .0 1 )、 2 8.0 4 %(P <0 .0 1 )、2 9.1 7% (P <0 .0 1 )和 2 8.0 8% (P <0 .0 1 ) ,但组间差异不显著。试验组经济效益明显。  相似文献   

6.
1.平时你最喜欢读什么书?A.文学类(11.8%)B.科幻类(26.5%)C.人物传记类(0%)D.漫画类(9%)E.其他(11.8%)F.所有类别几乎全部涉及到(38%)2.家中有属于你的书柜吗?A.有(88.2%)B.没有(11.8%)3.你的书大部分是谁做主买的?A.自己决定,家长不干涉(14.7%)B.家长买了后给自己(9%)C.与家长商量同意后自己去买(76.5%)4.你认为阅读给你带来的收获是什么?(最多只能选两个)A.消遣,让自己不无聊(26.5%)B.调节心情,让自己觉得快乐(58.8%)C.让自己的作文写得更好(29.4%)D.增加课外知识(64.7%)5.父母和你一起阅读吗?A.一直都有(38.2%)B.从来没有(17.6%)…  相似文献   

7.
采用溴酸钾 溴化钾消解法 ,通过对消解时间、消解温度及盐酸羟胺加入量的研究 ,得出较为适合的实验条件 ,可以快速测定水样中的汞 ,实际样品分析结果满意 ,RSD % =0 .76%~ 2 .7% ,CV % =92 .8%~ 1 0 1 .3%。  相似文献   

8.
《莆田学院学报》2019,(2):100-103
建立了测定海水中缩二脲含量的分光光度法。样品经碳酸钠、氢氧化钠过滤预处理后,在550nm波长处测定,测定相对标准偏差为0. 72%~2. 79%,相对误差为-0. 30%~0. 75%,标准曲线线性、精密度、准确度均良好,检出限2. 00 mg/L,定量限6. 00 mg/L,加标回收率95. 4%~100. 7%。该方法准确、可靠、抗干扰性好,可用于海水中缩二脲的测定,也可以用于异氰酸酯类海洋污染事故的应急监测。  相似文献   

9.
熊伟 《华章》2007,(10):23-23
家族企业一般是指一个或两个家族中有两个以上同一代的人或者两代以上的人拥有对企业的全部或部分所有权的企业.在美国,75%以上企业是家族企业,500强35%是家族企业,家族企业的产值占美国GDP的50%,提供60%的岗位.在欧洲,家族企业占比重:意大利95%,瑞典90%,西班牙80%,英国75%.在日本,99.1%的企业是家族企业.在东南亚,香港股市中67%的上市公司由家族所控股,香港15个大家族控制了35%的香港股市市值.印尼和菲律宾全部市场资本额的1/6都在一家最大的家族企业所控制,而又超过一半以上的上市公司资本额都由10个家族企业所掌控.  相似文献   

10.
乌江上游四川裂腹鱼和昆明裂腹鱼肌肉营养成分的分析   总被引:2,自引:0,他引:2  
试验结果表明,四川裂腹鱼和昆明裂腹鱼肌肉中蛋白质、脂肪、灰分含量分别为15.49%、15.78%,1.03%、2.29%,1.06%、1.11%.肌肉中不饱和脂肪酸含量分别占脂肪酸总量的71.72%和73.21%.肌肉中18种氨基酸总含量分别为75.20%和79.1496(占肌肉干重),其中必须氧基酸含量分别为31.95%、32.38%,占氨基酸总量的42.51%和40.91;鲜味氨基酸含量分别达30.03%和30.40%,占氨基酸总量的39.97%和38.42%.根据氨基酸评分,第一限制氨基酸为蛋氨酸+胱氨酸,第二限制氨基酸为色氨酸:根据化学评分,第一限制氨基酸为色氨酸,第二限制氨基酸为蛋氨酸+胱氨酸.  相似文献   

11.
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity.  相似文献   

12.
风的曲线     
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose.  相似文献   

13.
Given a graph G,a subgraph C is called a clique of G if C is a complete subgraph of G maximal under inclusion and |C|≥2. A clique-transversal set S of G is a set of vertices of G such that S meets all cliques of G. The clique-transversal number, denoted as TC (G), is the minimum cardinality of a clique-transversal set in G. The clique-graph of G, denoted as K (G), is the graph obtained by taking the cliques of G as vertices, and two vertices are adjacent if and only if the corresponding cliques in G have nonempty intersection. Let F be a class of graphs G such that F={G|K(G) is a tree}. In this paper the graphs in F having independent clique-transversal sets are shown and thus TC (G)/|G|≤1/2 for all G ∈ F.  相似文献   

14.
《海外英语》2007,(5):44-45
It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,  相似文献   

15.
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/  相似文献   

16.
《海外英语》2007,(5):10-11
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?  相似文献   

17.
Different nations have different social cultures, and the social culture of every nation is developing with the development of the nation, language is greatly influenced by social culture, which enables language to possess national and historical characteristics. Word is the smallest, independent, meaningful linguistic unit of language. It can well reflect the national and historical characteristics. From synchronic aspect, the social and cultural influence on word meaning is mainly embodied in conceptual and associative meanings of word. The incorrespondence of word meaning is a phenomenon that exists in both conceptual and associative meanings of word among different languages. From diachronic aspect, the development of social culture causes some changes of word meaning to some extent. Therefore, social culture plays a key role in vocabulary learning and mastery of a language.  相似文献   

18.
汉字倒说     
汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。  相似文献   

19.
20.
《海外英语》2007,(4):36
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.  相似文献   

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