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Phytoparasitica - Plant-parasitic nematodes feed and reproduce in chickpea roots. Root-lesion nematodes are one of the most important biotic factors to limit chickpea production in the world. The... 相似文献
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Allahverdipour Tohid Shahryari Fatemeh Falahi Charkhabi Nargues 《European journal of plant pathology / European Foundation for Plant Pathology》2021,161(4):783-797
European Journal of Plant Pathology - A bacterial disease of walnut (Juglans regia) has been observed in northwestern Iran during the summer of 2018 with symptoms similar to the shallow bark canker... 相似文献
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Agrichemicals usually contaminate groundwater via preferential flow, therefore determination of the preferential flow characteristics of soil is needed. One model that predicts solute transport due to preferential flow is the mobile–immobile (MIM) solute-transport model, which partitions total water content (θ; m3 m?3) into mobile (θm) and immobile fractions (θim). In undisturbed soils, a method is proposed for determining the MIM model parameters, i.e. immobile water fraction (θim), mass transfer coefficient (α) and hydrodynamic dispersion coefficient (D h). Breakthrough curves were obtained for five different soil textures in three replicates, by miscible displacement of Cl? in undisturbed soil columns. Cl? breakthrough curves were evaluated in terms of the MIM model. Analysis suggests that the values of D h and α increased with lighter soil textures and θim increased with heavier soil textures. The values of θim ranged from 5.31 to 14.28% in different soil textures. Furthermore, values of θim were found to be related to soil clay content. Values of α ranged from 0.0257 to 0.32 h?1 and values of D h ranged from 0.36 to 11.2 cm2 h?1 in different soil textures. A significant linear correlation was obtained between α, θim, D h and soil saturated hydraulic conductivity (K s) and pore water velocity (v). A multivariate pedotransfer function was developed to estimate α, θim and D h based on the geometric mean (d g) and the standard deviation (σg) of the diameter of soil particles and soil organic matter content. The pedotransfer functions for D h, θim and α were validated by independent data sets from other investigators. 相似文献
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The effect of mannanoligosaccharides (MOS) and Humate (HU) in broiler diets on antibody titers against Avian Influenza virus
(AIV) was evaluated. A completely randomized experimental design was used, and chicks were divided into 8 treatment groups,
with 4 replicates per treatment and 10 chicks per replicate. Treatments were: 1) negative control group (CTL−), neither vaccinated
against AIV nor given additives; 2) positive control (CTL+) or broilers were vaccinated against AIV + 0 additives; 3,4 and
5) CTL+ plus diet supplemented with 0.1, 0.2 and 0.3% HU, respectively; 6,7 and 8) CTL+ plus diet supplemented with 0.1, 0.2
and 0.3% MOS, respectively. For antibody analyses, blood samples were weekly collected by wing veins and the titers of antibody
against AIV were measured by haemagglutination-inhibition test (HI). Compared to the positive control, the antibody titers
against AIV were determined significantly lower in negative control group from 28 to 42 days of age. The inclusion of MOS
resulted in increased antibody titers against AIV in the fourth, fifth and sixth weeks of age. MOS was effective in stimulating
the humoral immune responses against AIV vaccine viruses. This study demonstrated an increase in the antibody titers in broilers
fed diets containing 0.3% HU. In general, results of this study demonstrated that MOS proved to be much more effective on
antibody production against AIV in broiler chicks than HU. Immune function could be modified with dietary HU and MOS supplementation. 相似文献
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