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1.
石栗树茎段组织培养的研究   总被引:1,自引:1,他引:0  
建立石栗组织培养的技术体系,筛选出适合诱导愈伤组织和愈伤组织分化的培养基。从外植体消毒,激素配比,培养基筛选等方面对石栗组织培养进行了探索。结果表明诱导愈伤组织的主要因素是细胞分裂素和生长素的比值。TDZ对愈伤组织诱导丛生芽有抑制作用。诱导愈伤组织的最适培养基为:1/2MS+ZT 2 mg/L+NAA 0.5 mg/L+氯化胆碱2 mg/L,诱导愈伤组织丛生芽的最适培养基为1/2MS+6-BA 1 mg/L +IBA 0.1 mg/L。影响诱导愈伤组织的主要因素是细胞分裂素和生长素的比值。  相似文献   

2.
为验证清热解毒类中药体外联合抗菌协同指数(SI)判定标准的适用性。采用微管-平板法测定甘草(Radix glycyrrhiza)、黄连(Rhizoma coptidis)、金银花(Flos lonicerae japonicae)、黄柏(Cortex phellodendri chinensis)和秦皮(Cortex fraxini)的水提物和乙醇提取物对猪链球菌Ⅱ型的抗菌活性,用棋盘微量肉汤稀释法测定这五味药不同提取物两两配伍的协同指数,然后将其组方,分别水煎煮和醇提取,并测定其对猪链球菌Ⅱ型的最小抑菌浓度(MIC)。结果表明,黄连和秦皮配伍SI为0.5,甘草和秦皮、甘草和金银花的SI都为0.75,甘草和黄连组方后醇提物对猪链球菌Ⅱ型的MIC为7.81 mg/mL,甘草和秦皮组方后醇提物对猪链球菌Ⅱ型的MIC为1.95 mg/mL,黄连和黄柏组方后的水提物对猪链球菌Ⅱ型的MIC为0.98 mg/mL,黄连和秦皮组方后水提物对猪链球菌Ⅱ型的MIC为1.95 mg/mL。由此表明,黄连醇提物和秦皮水提物的体外联合的协同作用明显,黄连和黄柏药对的水提物对猪链球菌Ⅱ型的抑制作用较好。  相似文献   

3.
为获得最佳的梨ISSR-PCR反应体系,以及验证在其他标记上具有通用型,以‘新世纪梨’ב崇化大梨’杂交F1代为试验材料,采用L25(56)试验正交设计法及单因素方法,对反应体系中的模板DNA量、dNTPs、引物、TaqDNA聚合酶这4个单因素进行优化。结果表明,梨ISSR-PCR最优的20μL体积的反应体系中,含模板DNA 3 ng/μL,dNTPs 0.20 mmol/L,引物0.5μmol/L,TaqDNA聚合酶0.03 U/μL。采用优化后的反应体系对试验材料进行了SRAP、SSR标记方法的扩增,结果显示该反应体系也适用于梨属的SRAP、SSR分析。为梨属在以后的多标记的遗传多样性分析、种质资源评价和遗传图谱的构建等提供理论基础,并在试验中减少费用和提高效率。  相似文献   

4.
江西红壤旱地木薯农艺性状与产量的关系初步研究   总被引:5,自引:2,他引:3  
为筛选出更适宜江西省种植的木薯高产品种,以19个品种(或品系)为材料,对不同品种间产量差异及其与农艺性状的关系进行研究。结果表明,5个品种的鲜薯产量高于37.5 t/hm2,6个品种的鲜薯产量介于30~37.5 t/hm2之间,4个品种的鲜薯产量介于22.5~30 t/hm2,其他4个品种的鲜薯产量低于22.5 t/hm2。19个木薯品种中有7个品种的鲜薯产量高于对照品种SC205,其中SC8和GR024-2的鲜薯产量和淀粉含量均表现较高。木薯的生物产量、收获指数、最粗薯粗与鲜薯产量呈极显著正相关,鲜薯干物率与鲜薯产量呈极显著负相关,而单株薯数、鲜薯淀粉含量、株高、茎粗、最长薯长与鲜薯产量相关不显著。  相似文献   

5.
张丽  高敏华 《中国农学通报》2014,30(32):301-307
分析了新疆15 个行政区2000、2005、2009 年的人口数量的空间和时间变化趋势以及分布特征,研究了人口变化的驱动因子。并运用GIS 软件生成2009 年新疆人口密度图。结果表明:新疆人口数量处于不断增长的趋势,呈现出大城市集聚效应明显增加,区域人口密度差异大,人口空间分布不均衡的分布特点。并指出新疆人口在时间、空间上的分布特征是与地理自然环境状况、经济发展水平状况以及国家政策等是相关的,其中经济水平在各种因素中起主导作用。  相似文献   

6.
“桂裕”牌育苗营养基质对西瓜生长的影响   总被引:1,自引:1,他引:0  
为推广“桂裕”专用型育苗营养基质在西瓜育苗上的应用,于2011年研究3种基质对西瓜苗期生长及产量和品种的影响。结果表明,“桂裕”基质处理的各项指标均优于山东和习惯处理,(1)茎粗:桂裕处理在嫁接前为3.26 mm,比山东处理粗2.11%和极显著比习惯粗12.03%,移栽期茎粗为4.97 mm仍比山东处理粗2.26%和显著比习惯粗9.23%;(2)一级侧根数:桂裕、山东和习惯分别为9条/株、8条/株、7条/株;(3)主根长:桂裕处理为8.6 cm,分别比山东和习惯长0.7 cm和1.0 cm;(4)单瓜重:桂裕处理为5.46 kg,显著比山东和习惯的重5.60%;(5)产量:桂裕处理达32825 kg/hm2,分别比山东和习惯的增产6.06%和11.08%;(6)纯收入:桂裕处理为33390元/hm2,分别比山东和习惯多2295元/hm2和3855元/hm2;(7)糖度:桂裕处理为11.8°与其他处理相当。因此,“桂裕”育苗营养基质可以作为西瓜的育苗基质进行推广应用,且幼苗的茎粗、一级侧根数及主根长可作为评判移栽后西瓜产量的指标。  相似文献   

7.
不同饲用玉米品种产量及青贮品质比较分析   总被引:4,自引:1,他引:3  
为筛选出适宜安徽省种植的饲用玉米品种,进行了10个饲用玉米品种的产量及青贮品质比较研究。结果表明:品种间产量和青贮品质存在显著差异。其中,‘玉草3号’的产量最高,YA473182的产量仅次于‘玉草3号’;YA473182的氨态氮(NH3-N)含量略低于‘玉草3号’,乳酸(LA)含量显著高于‘玉草3号’,发酵品质较好;YA473182的可溶性碳水化合物(WSC)含量及粗蛋白(CP)含量显著高于其他品种,且中性洗涤纤维(NDF)及酸性洗涤纤维(ADF)含量相对较少,饲用品质较好。综合考虑各玉米品种的产量及青贮品质,YA473182和‘玉草3号’最适合安徽省种植利用,‘瑞德2号’和‘豫青3230’也有推广价值。  相似文献   

8.
不同种植年限对菜地土壤结构的影响   总被引:3,自引:0,他引:3  
万毅林  高明 《中国农学通报》2015,31(13):236-243
为了探究不同种植年限对菜地土壤结构的影响情况,为土壤培肥提出切实可行的方法,采用萨维诺夫法分析了重庆市九龙坡区白市驿镇蔬菜基地种植1年、5年、10年的菜地土壤团聚体的组成情况及其差异。结果表明:水稳性团聚体含量以及稳定性在不同种植年限土壤间存在较大差异。对于0~20 cm土层土壤,1~0.25 mm、>3 mm和>5 mm水稳性团聚体含量均表现为1年>5年>10年,20~40 cm土层也存在类似变化。表明随着种植年限的增加,各土层土壤水稳性团聚体含量逐渐降低。对于0~20 cm土层,1年土壤>0.25 mm团聚体平均破坏率为27.78%,5年和10年土壤>0.25 mm团聚体平均破坏率分别高达49.86%、58.74%;对于各种植年限土壤20~40 cm土层也存在相同的趋势。说明随着种植年限的增加,土壤团聚体破坏率增高,土壤结构稳定性降低。相关分析表明,土壤有机质含量与种植年限、平均破坏率呈显著负相关(相关系数分别为-0.880*、-0.897*、n=6),与>0.25 mm水稳性团聚体含量、>3 mm水稳性团聚体含量、>5 mm水稳性团聚体含量、3~1 mm水稳性团聚体含量、1~0.25 mm水稳性团聚体含量呈显著正相关(相关系数分别为0.897*、0.868*、0.859*、0.835*、0.829*、n=6),土壤团聚体MWD与>0.25 mm水稳性团聚体含量之间达到极显著正相关(相关系数为0.985**,n=6)。说明随着种植年限增加,土壤有机质含量降低,水稳性团聚体含量增加,平均破坏率逐渐增加。>0.25 mm的水稳性团聚体含量越多,土壤平均重量直径(MWD)值越大,土壤团聚体稳定性越强。有机质含量是影响研究区紫色土土壤水稳性团聚体含量及稳定性的主要因素。  相似文献   

9.
10.
换水频率和附着基对大珠母贝育苗效果的影响   总被引:1,自引:0,他引:1  
为了提高大珠母贝育苗生产的效率,2013 年4 月10 日—6 月27 日,设立3 个试验分别比较了换水频率、附着基的类型和附着基的颜色对大珠母贝育苗效果的影响。试验Ⅰ:换水频率对大珠母贝幼虫生长发育和存活的影响,设立A1、A2、A3、A4和A0共5 个组,其中A1、A2、A3、A4分别为每3、6、9、12 天换水1次,A0为对照组每日换水1 次;试验Ⅱ:附着基的种类对大珠母贝幼虫附着变态的影响,设立B1、B2、B3、B4共4 个组,其中B1、B2、B3、B4分别为尼龙网布、黑色粗糙面塑料片、黑色光滑面塑料片、遮阳网;试验Ⅲ:附着基颜色对幼虫附着变态的影响,设立C1、C2、C3、C4共4 个组,其颜色分别为红色、黑色、黄色和绿色。结果表明,换水频率、附着基的种类和颜色对大珠母贝的育苗效果存在显著影响(P<0.05)。试验中每6~9 天换水一次的幼虫生长和成活率最高,粗糙面塑料片和深色(红色、黑色)附着基附苗量最大,大珠母贝生产中适合在此条件下育苗。  相似文献   

11.
After completion of Three Gorges Reservoir at Yangtze River, protecting and improving the ecological environment of this area is becoming increasingly important factor in comprehensive progress of the economy and society of Chongqing City. The industrial solid wastes are one of the crucial factors influencing the environment quality of Three Gorges Area and they are also the hot and difficult problems influencing the development of economy and society of Chongqing City. At this point, firstly, the discharge, present situation, prospect and development of treatment and utilization of industrial wastes in Chongqing are summarized. Secondly, the experience at home and abroad are analyzed. Then, the way and foreground for recycling the wastes with new technology are also discussed. Finally, countermeasure for treatment and utilization of industrial solid wastes after completion of Three Gorges Reservoir at Yangtze River is brought up. The study on treatment and utilization technology of industrial solid wastes will be beneficial not only to the protection of ecological environment of Three Gorges Area, but to the development of new Chongqing City as well. In a word, it will have great environmental, social and economic benefits.  相似文献   

12.
在三峡库区典型紫色土坡耕地,设置了四种生态种植模式,进行经济和生态环境效应的研究。结果表明:投入产出比,梨×连翘/花生>桃×连翘/花生>桃/花生>梨/花生>CK,其中梨×连翘/花生与桃×连翘/花生模式分别比对照提高69.9%和65.5%,;影响果树冠幅的主要因子是土层厚度、坡位与种植模式;套种连翘的二种模式须根量明显比其它模式高,树种根系分布特征、种植密度和土层厚度是影响须根量的主要因素;种植模式和坡位均显著影响土壤孔隙度的发育,各种植模式的土壤孔隙度顺序:梨×连翘/花生>桃×连翘/花生>桃/花生>梨/花生  相似文献   

13.
王成超 《中国农学通报》2010,26(18):315-319
针对生态系统的恢复问题,本文以鲁中南沂蒙山区B村为案例,采用田野调查和对比分析方法,对该村农户生计行为变迁过程及生态效应进行研究,研究结果表明:农户生计行为变迁在很大程度上决定了生态系统的变迁规律及结果;而21世纪初期以来该村农户生计行为本地非农化主要是社区增权的结果,但农户生计方式的变迁具有一定的时滞性;最后,提出需要对当前人地系统科学的普同性的解释范式需要反思,避免西方社会的“文化霸权”在中国的蔓延。  相似文献   

14.
建立公共财政在农民职业教育中的投入机制,加大政府公共财政的支持力度,优化公共财政对农民职业教育的支持方式,加强资金投入监管,大力发展农民职业教育,培养数以亿计的实用型、技术型人才,提高农村劳动者总体素质,对实现科教兴农,加速农村产业结构调整,切实提高农民收入,保持农村社会稳定,有深远的影响。  相似文献   

15.
Such the geological hazards as landslide, rockfall, debris-flow and so on frequently occur in the Three Gorges Reservoir Area, so it is a very practical and immediate job to explore the mechanism caused the geological hazards and how to forecast and control the geological hazards. For this reason, this paper introduces the situation of the geological hazards occurred in the Three Gorges Reservoir Area and the major type and feature of the geological hazards occurred in Chongqing, and discusses the basic principle about the modern nonlinear science applied to the geological hazards and the creep-slip, stick-slip occurred on the joints of rock mass and the monitoring technology of the geological hazards.The basic thinking is put forward which can be applied the modern nonlinear science to the geological hazards occurred in the Three Gorges Reservoir Area.  相似文献   

16.
In this paper, the possible geological disasters in Three Gorges Reservoir Area are reviewed. Firstly, the types of geological disasters are classified and their influencing factors and growth characteristics are analyzed, then the damages, which have happened in this area up to now, are listed. On this basis, five aspects of dangers brought by geological disasters to society and economic environment are analyzed. Finally, a conclusion was drawn that the geological disasters in Three Gorges Reservoir Area have done some harms to this area and the situation becomes worse than before. So some reasonable measures should be taken quickly.  相似文献   

17.
Yulin River is the major secondary stream of Three Gorges Reservoir Area. According to the requirement of "The Prevention Plan of Water Pollution in Three Gorges Reservoir Area and the Upper Areas (2001-2010)", the water environment pollution in Yulin River valley should be controlled. In this paper the reason of the water pollution is analyzed through investigation and evaluation on the present situation of Yulin River in North Chongqing area, and then a proposal on the prevention and cure measure of water pollution of Yulin River is presented.  相似文献   

18.
With GC/MS Approach, PAHs in raw water and effluent of six water purification plants in Three Gorges Reservoir Area are analyzed quantificationally. Six species of PAHs such as acenaphthene, phenanthrene, anthracene, pyrene, fluoranthene and acenaphthylene are determined. Of which, fluoranthene is priority pollutant firstly listed by SEPA. The results show that there are several variety of PAHs in raw water and effluent in water purification plants of Three Gorges Reservoir Area, but on the whole, PAHs concentration level is low. The results also show that PAHs removal capacity of conventional water treatment techniques is poor.  相似文献   

19.
There is a promising future for lateral aviation in the Three Gorges Reservoir Area of the Yangtze River because of the abundant natural and cultural tourism resources.The advantage of the lateral aviation is its low investment,convenience,speed,and wide service area.It is an important factor for the future development of tourism in cities in this area.This paper analyzes the realities and problems facing lateral aviation in this area and suggests some countermeasures and planning suggestions for lateral aviation development.  相似文献   

20.
The gases generated by anaerobic fermentation of organic solid wastes in Three Gorges Reservoir Area are CH_4,CO_2,H_2S,NH_3,H_2 and some micro-gases.Data analysis shows that in the cities and towns of Three Gorges Reservoir Area,4 380 thousand tones of garbage,3 800 thousand tones of faecal were generated each year.In landfill of the garbage in average of 290 millions kg of CH_4 was generated,also in average of 230 millions kg of CH_4 was generated from the faecal.CH_4 is a very important greenhouse gas;the proportion of its contribution to greenhouse effect is next to CO_2.Other gases only have small influence on the whole atmospheric environment.  相似文献   

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