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排序方式: 共有533条查询结果,搜索用时 15 毫秒
71.
Ahmed Muideen Adewale Adeyemi Kazeem Dauda Jahromi Mohamed Faseleh Jusoh Shokri Alimon Abdul Razak Samsudin Anjas Asmara 《Tropical animal health and production》2017,49(8):1749-1756
Tropical Animal Health and Production - The effects of partial replacement of dietary protein by forages on rumen fermentation and microbiology in goats were examined. Four fistulated Boer bucks... 相似文献
72.
In this paper, seed morphology and effects of pre-sowing treatments were studied. Matured seeds of the species were collected
from healthy trees in the National Botanical Garden, Bangladesh, and treated with five pre-sowing treatments. The average
length, breadth and thickness were found to be 0.56±0.03 cm, 0.44±0.009 cm and 0.26±0.008 cm in Albizia richardiana King and Prain, and 1.32±0.02 cm, 0.55±0.04 cm and 0.11±0.002 cm in Lagerstroemia speciosa L., respectively. Germination was carried out in polybags with a mixture of topsoil, coconut husk compost, coarse sand and
fine sand in a ratio of 3:4:1:1. Results revealed that the germination rates of seeds in different pre-sowing treatments were
significantly increased compared to those in cold-water treatment in both species. The highest germination rate was found
to be 96% in hot-water treatment followed by 87%, 83% and 49% in treatments with scarification, H2SO4 and control in A. richardiana, respectively. However, the highest germination rate (79%) was found in H2SO4 treatment followed by 64%, 62% and 25% in treatments with hot water, scarification and control in L. speciosa, respectively. The lowest germination (35% in A. richardiana and 20% in L. speciosa) was found in cold-water treatment in both cases. Analysis of variance (ANOVA) showed the significant difference among the
treatments for both species. It is concluded that hot-water treatment is recommended for seed germination of both species
in rural Bangladesh. 相似文献
73.
M. A. Mannan M. A. Karim Q. A. Khaliq M. M. Haque M. A. K. Mian J. U. Ahmed 《Journal of Crop Science and Biotechnology》2010,13(1):33-37
A large number of soybean (Glycine max L.) genotypes of diverse growth habit and adaptive characters were used in the experiment. Soil salinity-induced changes
in nine morpho-physiological characters of 30-day-old seedlings of 170 soybean genotypes were compared in the study. The first
and second principal components (PC) of principal component analysis (PCA) results accounted for 97 and 2.5%, respectively,
of the total variations of soybean genotypes. The variation for the first PC was composed mainly of relative total dry weight
(DW), relative shoot dry weight, as well as petiole dry weight. There were four clusters distinguished in the cluster analysis.
The genotypes in cluster IV performed better in respect to relative total dry weight and relative shoot dry weight and hence
having salt tolerance. The genotypes clusters III performed very poorly and those of clusters II and I were moderate to poor.
D2 analysis indicated that the clusters differed significantly from each other. Discriminant function analysis (DFA) again
asserts strongly that more than 92% of the genotypes were correctly assigned to clusters. Both PCA and DFA confirmed that
the relative total DW followed by shoot and petiole DW were the major discriminatory variables, and the root DW were the secondary
important variables to distinguish genotypes into groups. In this study, multivariate analyses were used in identifying the
soybean genotypes of desirable traits for salt tolerance. 相似文献
74.
75.
Sara Oveissi Abdul Rahman Omar Khatijah Yusoff Fatemeh Jahanshiri Sharifah Syed Hassan 《Comparative immunology, microbiology and infectious diseases》2010,33(6):491-503
The H5 gene of avian influenza virus (AIV) strain A/chicken/Malaysia/5744/2004(H5N1) was cloned into pcDNA3.1 vector, and Esat-6 gene of Mycobacterium tuberculosis was fused into downstream of the H5 gene as a genetic adjuvant for DNA vaccine candidates. The antibody level against AIV was measured using enzyme-linked immunosorbent assay (ELISA) and haemagglutination inhibition (HI) test. Sera obtained from specific-pathogen-free chickens immunized with pcDNA3.1/H5 and pcDNA3.1/H5/Esat-6 demonstrated antibody responses as early as 2 weeks after the first immunization. Furthermore, the overall HI antibody titer in chickens immunized with pcDNA3.1/H5/Esat-6 was higher compared to the chickens immunized with pcDNA3.1/H5 (p < 0.05). The results suggested that Esat-6 gene of M. tuberculosis is a potential genetic adjuvant for the development of effective H5 DNA vaccine in chickens. 相似文献
76.
Influence of prohexadione-calcium on growth and gibberellins content of Chinese cabbage grown in alpine region of South Korea 总被引:2,自引:0,他引:2
Sang-Mo Kang Jung-Tae Kim Muhammad Hamayun In-Cheon Hwang Abdul Latif Khan Yoon-Ha Kim Joon-Hee Lee In-Jung Lee 《Scientia Horticulturae》2010
We investigated the effect of prohexadione-calcium (Pro-Ca) on growth characteristics and endogenous gibberellins content of Chinese cabbage grown in the alpine region of South Korea. Pro-Ca was applied at the rates of 200 ppm and 400 ppm, after 10, 15 and 20 days of transplanting seedlings in to the field. Application of Pro-Ca through foliage improved quality and quantity of yield by promoting Chinese cabbage head yield, number of head leaves, total soluble sugar content and compactness of head. The leaf size was reduced, while the chlorophyll content increased under the influence of elevated Pro-Ca application, when measured after 40 days of transplantation. The endogenous bioactive GA1 and GA4 contents of Chinese cabbage drastically decreased with elevated Pro-Ca, indicating that gibberellins (GAs) biosynthesis was blocked by this chemical. Current study suggests that both of GAs biosynthesis pathways are operational in Chinese cabbage, although non-C13-hydroxylation pathway was found to be the major pathway. GAs were quantified by gas chromatography/mass spectroscopy-selective ion monitoring (GC/MS-SIM). 相似文献
77.
Waqas Wakil M. Usman Ghazanfar Tahira Riasat Mirza Abdul Qayyum Sohail Ahmed Muhammad Yasin 《Phytoparasitica》2013,41(2):221-234
A local isolate of Metarhizium anisopliae (Hypocreales: Clavicipitaceae), Bacillus thuringiensis subsp. kurstaki and chlorantraniliprole were assessed against six field populations of tomato fruitworm Helicoverpa armigera Hübner (Lepidoptera: Noctuidae) in a series of laboratory bioassays. Two dose rates of B. thuringiensis (0.5, 1 μg g?1), one of both M. anisopliae (1.3?×?106 conidia ml?1) and chlorantraniliprole (0.01 ppm) were applied alone and in combination with each other against 2nd, 3rd, 4th and 5th larval instars. The mortality was observed every 24 h until pupation. The bioassays were carried out at 25°C and 75% r.h. The highest mortality was observed in Rawalpindi with the lowest pupation rate by applying the combined concentrations of B. thuringiensis and chlorantraniliprole. The lowest mortality was observed in population from Gujranwala among all the tested populations. The antagonistic interaction was noted where the high dose rate of B. thuringiensis was combined with M. anisopliae; however, the remaining interactions enhanced the mortality and reduced the percent pupation. The overall results demonstrated that all the treatments gave significant control of the larval instars of H. armigera. The population from Gujranwala proved least susceptible whereas the one from Rawalpindi was highly susceptible. 相似文献
78.
The prolonged irrigation with marginal quality water can cause secondary salinization of soils, which necessitates for better understanding of water management alternatives. Relative performance of sulfuric acid and gypsum is still controversial to counter sodium hazards in soil/water system. As an alternative, sulfurous acid generators (SAG) are also being marketed. But up-till-now, there is not even a single field study published in scientific journals about their efficiency and economical viability for the treatment of saline-sodic water. Therefore, a field study was carried out to compare the effectiveness of SAG and alternate amendments applied on an equivalent basis to grow rice crop. SAG treatment of saline-sodic tube well water decreased only residual sodium carbonate (RSC) from 5.4 to 3.6 mmolc l−1, and had no beneficial effect on its sodium adsorption ratio (SAR) or electrical conductivity (EC). All the treatments kept soil EC and SAR around their respective threshold levels. For paddy yield, SAG, sulfuric acid, and gypsum treatments depicted nonsignificant differences. SAG and sulfuric acid treatments of water were about six times expensive than that of gypsum. It was concluded that soil-applied gypsum, to counter sodic hazards of irrigation water, is economical to sustain irrigated rice in dry regions. 相似文献
79.
The development of anthelmintic resistance has made the search for alternatives to control gastrointestinal nematodes of small ruminants imperative. Among these alternatives are several medicinal plants traditionally used as anthelmintics. This present work evaluated the efficacy of ethyl acetate, acetone, and methanol dried leaf and seed extracts of five medicinal plants were tested in vitro ovicidal and larvicidal activities on Haemonchus contortus. The in vitro assay was based on egg hatch assay (EHA) and larval development assay (LDA), all plant extracts were evaluated at five concentrations 50, 25, 12.5, 6.25 and 3.13 mg/ml. The leaf and seed ethyl acetate, acetone and methanol of Annona squamosa, Eclipta prostrata, Solanum torvum, Terminalia chebula, and Catharanthus roseus extracts were showed complete inhibition (100%) at the maximum concentration tested (50 mg/ml). The overall findings of the present study have shown that our experimental plant extracts contain possible anthelmintic compounds. 相似文献
80.
Syed Mustafa Khizar Hussain Shah Abdul Naeem Muhammad Waseem Tauqeer Ahmad Sadullah Khan 《Water, air, and soil pollution》2011,217(1-4):57-65
Cr3+ sorption on strong acid exchanger Amberlyst-15(H+) is studied as a function of time and temperature using CrCl3.6H2O and [Cr4(SO4)5(OH)2] solutions. The rate is found to be governed by a mixed diffusion for both the solutions and faster for Cl1? solution than SO4 2?. The exchange capacities are found to be higher for Cl1? system than SO4 2?. From the rate constant values, the energies of activation are calculated using the well-known Arrhenius equation. Equilibrium data is explained with the help of the Langmuir equation. The Langmuir parameters are also found to be higher for exchange from the chloride solutions. Various thermodynamic parameters (??Ho, ??So, and ??Go) for Cr3+ exchange on the resin are calculated. The ??Go values are found to be negative while ??Ho and ??So are positive for both the Cr3+/Cl1? and Cr3+/SO4 2? systems. It is suggested that in case of Cl1? solutions, the metal is exchanged as Cr3+, while in case of SO4 2? solutions, the metal exchanging specie is CrSO4 +. 相似文献