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111.
Green mature olives (Olea europaea L. cv. 'Manzanilla', 'Picual', and 'Verdial') were stored at 5 degrees C, and the oil extracted from them showed a middle intensity level of sensory-evaluated bitterness. The storage times necessary for this reduction were different for the three varieties tested, requiring 4, 6, and 8 weeks, respectively, for 'Manzanilla', 'Picual', and 'Verdial' olives. The level of commercial quality of the extracted oil did not deteriorate as a consequence of previous fruit storage. Olives matured during refrigeration at 5 degrees C, as the increase of maturation index and the decrease of color index and fruit firmness indicated. Similarly, as the fruit storage period progressed, the total phenolic compound content of the extracted oils decreased. Although the use of green mature olives may require a more prolonged storage time, it allows for a better postharvest handling of the fruits, which are more resistant to physical damage or fungal infections than the riper ones. 相似文献
112.
Osama G. Mohamed Sadaf Dorandish Rebecca Lindow Megan Steltz Ifrah Shoukat Maira Shoukat Hussein Chehade Sara Baghdadi Madelaine McAlister-Raeburn Asad Kamal Dawit Abebe Khaled Ali Chelsey Ivy Maria Antonova Pamela Schultz Michael Angell Daniel Clemans Timothy Friebe David Sherman Anne M. Casper Paul A. Price Ashootosh Tripathi 《Marine drugs》2021,19(8)
113.
Gabriele Rondoni Valeria Bertoldi Robert Malek Khaled Djelouah Chiaraluce Moretti Roberto Buonaurio Eric Conti 《Journal of pest science》2018,91(2):671-679
The invasive stink bug Halyomorpha halys is established in many European and American agro-ecosystems, where it causes severe crop losses. Potential control measures might include enhancement of plant defences. When attacked by herbivorous insects that oviposit on it, the plant may respond by priming direct defences, which might affect the development of future brood. Halyomorpha halys attacks numerous plant species in the invaded areas. Here, we investigated whether Vicia faba plants challenged by H. halys females can impair the development of its offspring through the activation of induced direct defences. We measured the weight and dimension of nymphs that developed on oviposition-experienced plants after 7 and 17 days from hatching. Nymphs that developed on oviposition-experienced plants weighed less compared to those that developed either on control plants or on plants solely subjected to H. halys feeding, and third instars showed shorter dimensions (tibia length). In addition, when oviposition-experienced plants were attacked by nymphs, higher and more rapid expression of two jasmonic acid-dependent genes (cysteine proteinase inhibitor gene and NAI1) was detected, possibly due to a mechanism of priming. Increased expression of the salicylic acid-responsive PR1 gene was also detected in egg-experienced plants, although the response was delayed compared to JA-dependent genes. Our results suggest that V. faba plants recognize H. halys oviposition as a warning signal and pre-activate defences against future nymphal herbivory. 相似文献
114.
115.
Hilali M Abdel-Gawad A Nassar A Abdel-Wahab A Magnus E Büscher P 《Veterinary parasitology》2004,121(1-2):45-51
A card agglutination test (CATT/T. evansi) was evaluated for detection of antibodies against Trypanosoma evansi (T. evansi) in experimentally and naturally infected buffaloes. Four calves were inoculated with a strain of T. evansi isolated from a dromedary camel. Parasitological examination of the calves revealed trypanosomes in the blood from days 4 to 9 post-inoculation (PI). General emaciation appeared from day 26 PI and aggravated until the end of the experiment (day 88 PI). Antibodies against T. evansi were detectable from day 8 PI till the end of the experiment. Parasitological examination of 200 water buffalo blood samples obtained from slaughterhouses revealed negative results. Serological examination of these animals showed that 48 (24%) water buffaloes had anti-T. evansi antibodies. 相似文献
116.
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118.
Khaled A. El-Tarabily Giles E. St. J. Hardy Krishnapillai Sivasithamparam 《European journal of plant pathology / European Foundation for Plant Pathology》2010,128(4):527-539
In the current study, the performance of three endophytic actinomycetes identified as Actinoplanes campanulatus, Micromonospora chalcea and Streptomyces spiralis previously shown to reduce seedling damping-off, and root and crown rots of mature cucumber (Cucumis sativus) caused by Pythium aphanidermatum in pots under greenhouse conditions were further evaluated to determine their potential as biological control agents and
as plant growth promoters in the field under the conditions of commercial production of cucumbers in the United Arab Emirates
(UAE). When applied individually or in combination to cucumber seedlings, the three isolates significantly promoted plant
growth and yield and reduced seedling damping-off and root and crown rots of mature cucumber plants. Individually the performance
level of S. spiralis was relatively the best followed by A. campanulatus and then by M. chalcea. The three isolates (which were not inhibitory to each other) performed better, both as biological control agents as well
as plant growth promoters, when applied together than when they were inoculated individually. The ability of these three isolates
to colonize the internal tissues of roots, stems and leaves under field conditions, and to persist up to 8 weeks after seedling
inoculation, showed that they can easily adapt to an endophytic habit systemically within healthy cucumber plants. As the
three endophytic actinomycete isolates also colonized the rhizosphere and showed outstanding rhizosphere competency it is
clear that they are facultative and not obligate endophytes. The success with the three inoculants indicated that they could
well be used in place of the fungicide metalaxyl which is currently recommended for the management of Pythium diseases in the UAE. This is the first successful field use of endophytic actinomycetes as promising plant growth promoters
and biological control agents against Pythium diseases of cucumber. 相似文献
119.
P. Ansquer R. Al Haj Khaled P. Cruz J.‐P. Theau O. Therond M. Duru 《Grass and Forage Science》2009,64(1):57-70
The use of plant phenology for determining the timing of management practices is poorly understood in species‐rich grasslands. The objectives were to assess the effect of management practices on the dates at which phenological stages occur and to compare different methods of calculating the growing degree‐days in order to predict them. Dates at which phenological stages of plant species occurred were recorded and plant strategy for resource capture and use was assessed through measurements of the dry matter content of leaves in two experiments in regions with contrasting climatic conditions. In Experiment 1, conducted near Toulouse, France, a set of 31 species was sown in pure stands at two levels of N availability. In Experiment 2, a network of 18 permanent grasslands, located in the French Pyrenees, was studied. In both experiments, the dry matter content of leaves, and flowering and ripening times, were measured. In Experiment 1, the dates on which a given phenological stage occurred were correlated with one another, and the grass species showed a significant ranking of dry weight of leaves for these dates. In Experiment 2, the difference between average flowering times of plant communities was shown to be around 40 d and resulted more from the species composition of the plant community than from their sensitivity to management practices. Plant communities were significantly ranked by dry weight of leaves for their flowering time. The minimum and maximum base temperatures which minimized the growing degree‐days between the two locations were 0 and 25°C, respectively, and the most appropriate date from which to start to accumulate temperatures was found to be 1 February. 相似文献
120.
Elena N. Sigida Ibrahim M. Ibrahim Maxim S. Kokoulin Hussein H. Abulreesh Khaled Elbanna Svetlana A. Konnova Yulia P. Fedonenko 《Marine drugs》2021,19(9)
The moderately halophilic strain Salinivibrio sp. EG9S8QL was isolated among 11 halophilic strains from saline mud (Emisal Salt Company, Lake Qarun, Fayoum, Egypt). The lipopolysaccharide was extracted from dried cells of Salinivibrio sp. EG9S8QL by the phenol–water procedure. The OPS was obtained by mild acid hydrolysis of the lipopolysaccharide and was studied by sugar analysis along with 1H and 13C NMR spectroscopy, including 1H,1H COSY, TOCSY, ROESY, 1H,13C HSQC, and HMBC experiments. The OPS was found to be composed of linear tetrasaccharide repeating units of the following structure: →2)-β-Manp4Lac-(1→3)-α-ManpNAc-(1→3)-β-Rhap-(1→4)-α-GlcpNAc-(1→, where Manp4Lac is 4-O-[1-carboxyethyl]mannose. 相似文献