常春藤无土栽培试验     

王文斗  那冬晨  赵浩华 《北方园艺》2009,(12)

通过分析比较无土栽培多种基质的结构及理化性质,选择蛭石作为常春藤的无土栽培介质.在参考国内外众多营养液配方的基础上,霍格兰营养液和观叶花卉专用营养液均含有常春藤生长所需的成分,为植株生长提供了合适、均衡的营养条件.自制了一种成本低廉,配制简便的营养液,与2种通用营养液一起进行了对比试验.结果表明:利用自制营养液进行常春藤无土栽培不仅成本低,易操作,且成活率高,生长状况良好等优点,是较好的无土栽培营养液.  相似文献   

防治马铃薯枯萎病药效试验   总被引：2，自引：0，他引：2  

纳添仓 《长江蔬菜》2009,(20)

通过用30%病虫净3号、64%杀毒矾、25%甲霜灵、50%乙膦铝锰锌、72%杜邦克露和50%代森锰锌6种药剂对马铃薯枯萎病进行防效试验.试验结果表明,30%病虫净3号对马铃薯枯萎病的防效优于其他常规药剂,药后15 d防效达71.95%,其次是72%杜邦克露和25%甲霜灵,防效分别达71.22%和61.59%,防效最差的是64%杀毒矾,仅为47.18%.  相似文献   

Cherry leaf roll virus causing a disease of Betula spp. in the United Kingdom     

COOPER  J. I.; ATKINSON  M. A. 《Forestry》1975,48(2):193-203

A virus, serologically related to isolates of cherry leaf rollvirus (CLRV) from Prunus avium (L.) L. and Sambucus nigra L.was transmitted to a range of herbaceous plants from leavesor roots of thirty-one of forty-seven trees of Betula spp. growingat two heathland sites in Berkshire. Ageing leaves of virus-infectedindividuals which had mild chiorotic blotches or ring and linepatterns in July showed bright yellow ring and line patternsin October. In the season after B. verrucosa seedlings wereinoculated with CLRV isolates, leaves developed chlorotic ringand blotch patterns; the symptoms being similar whether theinocula were originally isolated from S. nigra, P. avium orB. verrucosa. Palisade and mesophyll cells of naturally infectedleaves of B. verrucosa contained chloroplasts in which granalorganization was appreciably less distinct than that of chloroplastsfrom virus-free leaves. In many instances, virus-infected leafcells had spherical virus-like particles about 30 mn in diametercontained within tubular structures in cell wall projections;these structures were not seen in virus-free material. An isolate of CLRV from B. verrucosa, purified from systemicallyinfected leaves of Nicotiana clevelandii Gray by ammonium sulphateprecipitation and differential centrifugation, contained twomajor components having sedimentation coefficients of 118s and130s. Each component was composed of spherical particles withdiameters in the range 26–30 nm and having buoyant densitiesin caesium chloride of 1·460 and 1·493 gm/cm³.Polyacrylamide gel electrophoresis of preparations from bothbuoyant components indicated that they each contained a singlespecies of protein whose molecular weight was in the range 53,000–54,000daltons.  相似文献   

AMMI双标图在马铃薯区域试验产量分析中的应用     

NA Tiancang 《长江蔬菜》2008,(12)

运用AMMI模型,结合双标图对2007年国家中晚熟西北组马铃薯品种区域试验各承试点的平均产量结果进行分析。试验结果表明,在参试品种中,L0031-17、青薯6号高产但不稳产,陇薯3号为高产稳产型,品种960102、中9931-48稳产但不高产,8025-1不稳产又不高产。AMMI模型具体、直观、有效的综合评价,为马铃薯品种提供了一种比较好的分析方法。  相似文献   

The Genetic Research Progress of Fiber and Wool Quality in Cashmere Goat     

LI Xue-wu  WANG Rui-jun  WANG Zhi-ying  NA Qing  LI Hong-wei  WANG Zhen-yu  SU Rui  ZHANG Yan-jun  LI Jin-quan 《中国畜牧兽医》2016,43(12):3275-3284

Fiber and wool quality not only affects the economic benefits of cashmere goat breeding, but also affects the quality of wool textiles. In recent years, fluff quality has declined with cashmere yield improvement. In order to improve production efficiency, improving fluff quality is imperative in the production process. At the same time, fiber and wool quality is important parameters of selection in breeding of goats. The main traits of controlling the fluff quality are quantitative traits. It can be to find the number of main effect genes by quantitative genetics and molecular genetics and to study its growth mechanism and gene expression. In this review, we summarize the recent achievements of the quality of cashmere, including the use of phenotypic select to improve the quality of the fluff and finding the genetics of controlling the quality of cashmere, for example, HOX,BMP,KAP genes and pigments, and beginning to find the corresponding control target trait QTL and different sequences of SNPs by GWAS analysis to improve the quality by genotype selection, in order to improve the quality of cashmere and provide reference to study the cashmere quality of genetic factors for later research.  相似文献   

近红外光谱法与常规化学分析法苜蓿营养成分的对比研究     

纳嵘  扈登强 《畜牧与饲料科学》2018,39(9):43-45

选取20个不同来源的苜蓿样品作为研究对象,分别使用近红外光谱法和常规化学分析法检测苜蓿样品中水分、粗蛋白、粗脂肪、粗灰分、酸性洗涤纤维和中性洗涤纤维的含量,验证近红外光谱分析法与常规化学分析法检测的符合程度。试验结果表明：与常规化学分析法比较,苜蓿近红外光谱预测模型更适用于苜蓿样品中粗蛋白、粗脂肪、粗灰分、酸性洗涤纤维和中性洗涤纤维含量的检测,但并不适用于苜蓿水分含量的检测,因此,需要对已有的近红外预测模型进行调整和优化。  相似文献   

牧草营养成分聚类分析与评价   总被引：1，自引：0，他引：1  

夏明  桂荣  那日苏 《中国草地学报》2000,(4):33-37

利用等级聚合分类法,将30种人工栽培牧草按营养成分相似性分为五类,即高粗蛋白质+低灰分+低酶解蛋白类、高粗蛋白质+低灰分+高酶解蛋白类、高粗蛋白质+高灰分类、低粗蛋白质+高酸性洗涤纤维类、低粗蛋白质+低酸性洗涤纤维类.根据分类结果,讨论了利用聚类分析进行牧草营养价值评定的特点和使用方法.  相似文献   

赤峰市农民专业合作社发展现状与对策     

董春浩  张三强  李峰  尹继伟  贺磊  正月  周学超  秀梅  娜日娜  绳志生 《贵州农业科学》2020,48(10):156-160

  相似文献   

长期单作对枸杞园不同土层土壤微生物代谢活性和多样性的影响     

彭彤  马少兰  马彩霞  宋燕芳  高娜  李凯乐  张传继  李静雯  纳小凡  王立光 《草业学报》2023,32(1):89-98

土壤微生物群落多样性及其活性对维持农田土壤生态系统稳定和功能至关重要。前期研究表明，长期单作可导致枸杞园土壤微生物多样性降低和群落结构变异，但对其如何影响土壤微生物代谢活性尚不明确。为研究微生物代谢活性对长期单作的响应，利用Biolog Eco平板分析了枸杞园表层（0~20 cm）和亚表层（20~40 cm）土壤微生物底物利用谱（CLPP）的年代变化规律。结合土壤酶活性和理化性质测定和分析，探索了土壤微生物底物利用谱变化的驱动因子。结果表明，长期单作促进了枸杞园表层土壤微生物群落的代谢活性（P<0.05），但不影响亚表层土壤微生物的代谢活性和Shannon指数。随种植年限增加，表层土壤微生物对吐温80和衣康酸的代谢活性增加，而亚表层土壤微生物对D-葡萄氨酸和苯乙基胺的利用显著降低（P<0.05）。对不同碳源类型的分析发现，长期单作抑制了枸杞园表层和亚表层土壤微生物对多聚物的利用能力（P<0.05），说明土壤微生物对复杂有机物的降解能力可能受到干扰。变差分解分析表明，土壤理化性质和真菌丰度是驱动枸杞园土壤微生物代谢多样性变异的主要因子。这些结果表明长期单作干扰了枸杞园，尤其是亚表层土壤微生物的代谢活性，影响了其对复杂有机物的分解过程。在长期单作下，枸杞园亚表层土壤的植物-土壤负反馈作用可能更加严重，应受到更多关注。  相似文献   

Cherry Leaf Roll Virus in Juglans regia in the United Kingdom   总被引：1，自引：0，他引：1  

COOPER  J. I.; EDWARD  M.-L. 《Forestry》1980,53(1):41-50

Cherry leaf roll virus (CLRV) was detected in foliage, pollenor seeds of 43 of 113 mature/overmature Juglans regia L.; twohad foliar yellow-brown ring patterns whereas seven other infectedtrees had leaf necroses. Male catkins of a few infected treeswere malformed and blackened. Infection was rare (3/43) in the widely scattered J. regia ofnorthern England and Scotland, but commoner (40/70) in southernEngland. When J. regia seed was grown in methylbromide treated soil,six per cent (18/300) of the seedlings were symptomlessly infected.Four out of ten groups of imported seedlings were infected toa similar extent, CLRV being present in a total of 40 out of1146 trees aged five years or less. When 3 years old, CLRV infectedJ. regia were shorter and thinner than healthy seedlings. CLRV from walnut was serologically distinguishable from Betula,Prunus, Cornus and Sambucus isolates. One English walnut isolate(Ox) was distinguishable from two Italian walnut isolates. Anisolate (Sr) of CLRV obtained in Finland from Sambucus racemosaL. was antigenically distinct from S. ebulus and S. nigra isolates.  相似文献