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81.
对山东大正狐场1127只驯养母蓝狐29d的行为观察中发现:狐群中个体受人为环境影响,大致形成4种行为类型:攻击型、躲避型、胆怯型和温驯型,不同行为类型间产仔量差异显着。从行为学角度对这4种类型的演替关系分析得出:动物在人工驯养后出现的温驯行为是一种较高级神经活动,是适应环境的表现。温驯型狐易管理、发情好、繁殖率高(平均每胎仔狐数,比总体平均每胎数多0.4只),提高了经济效益,应引起养狐业及其它特种经济动物养殖业的关注。 相似文献
82.
Daniel Zizumbo-Villarreal Patricia Colunga-GarcíaMarín 《Genetic Resources and Crop Evolution》2008,55(4):493-510
No evidence exists of distillation in Mexico before European contact. The Philippine people in Colima established the practice
in the 16th Century to produce coconut spirits. Botanical, toponymic, archaeological, and ethnohistoric data are presented
indicating that agave distillation began in Colima, in the lower Armería-Ayuquila and Coahuayana-Tuxpan river basins, using
Agave angustifolia Haw. and through adaptation of the Philippine coconut spirits distillation technique. Subsequent selection and cultivation
of agaves led to their domestication and diversification. This did not take place in the lower river basins, where agave populations
tended to disappear. The distillation technique spread to the foothills of Colima volcanoes and from there to all of western
Mexico, leading to creation of tequila and other agave spirits. Two factors aided producers in avoiding strict Colonial prohibitions
and were therefore key to the diffusion and persistence of agave spirits production: (1) clandestine fermentation in sealed,
underground pits carved from bedrock, a native, pre-European contact technique; and (2) small, easy-to-use Philippine-type
stills that could be hidden from authorities and allowed use of a broad range of agave species.
Dedicated to Henry Bruman in honor of his contribution to the understanding of coconut and agave genetic resources history
in America. 相似文献
83.
Western Ghats, one of the megadiversity hotspots, hold a rich treasure of diversity in Momordica L. comprising M. charantia var. muricata, M. charantia var. charantia, M. dioica and M. sahyadrica. Vernacular names of these species vary from place to place. Traditional uses of these species comprising food, medicinal
and cosmetic, culinary preparations, vernacular names in local dialects and taboos and religious beliefs relating to their
domestication and folk taxonomy are dealt with in this paper. 相似文献
84.
[目的]为我国兜兰属植物的保护、开发应用和新品种选育提供参考依据和育种材料。[方法]引进杏黄兜兰(P.armeniacum)等24个兜兰属植物在贵州兴义进行驯化栽培试验。[结果]引进的24个兜兰属植物种均能正常生长,部分品种生长良好,繁殖率高。杏黄兜兰(P. armeniacum )、硬叶兜兰(P. micranthum)等分化繁殖率高,在植株生长点受损的情况下,分化率成倍增加。[结论]该研究为兜兰属植物资源保护和研究应用打下了一定基础。 相似文献
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The jujube tree (Ziziphus mauritiana Lam., Rhamnaceae family) is an exotic species which is commonly found in the Sahelian and Sudanian areas of Africa. A programme
was undertaken in Senegal to introduce domesticated varieties and adapt them to the edaphic and climatic specificities of
the Sahel. Research focussed on the ‘Gola’ variety, multiplied by an in vitro micrografting technique which is a miniaturisation of the apex splice, involving the aseptic grafting of miniature scions
(5 to 10 mm long) onto the hypocotyl of seedlings in vitro. Studies reported here include the choice and preparation of rootstock, the micrografting technique, acclimation of the grafts,
and transplantation to the field. The outcome of this research is the achievement of successful establishment of over 80%
of the micrografts. However, more work is required to evaluate the transferability of the techniques through a study of their
economic viability, as well as their acceptability to local people.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
90.
Prem Kant Jha Lohendra P. Dhakal Erik D. Kjær Jens-Peter Barnekow Lillesø 《Agroforestry Systems》2006,67(3):273-278
Shortage of fodder is a major constraint to livestock production in Nepal. The genetic variation in canopy biomass production
of Bauhinia purpurea L, a very important fodder species in Nepal, was estimated in a Breeding Seed Orchard in order to examine the potential of
simple, low input breeding. Substantial genetic variation could be observed suggesting that low input breeding based on simple
phenotypic selection can provide biomass gain in the order of 2–5% per year. Very high correlation was observed between stem
diameter (cross section area) and total biomass, making farmer based selection relevant. Jointly, these results suggest that
low input domestication is a promising option for improving fodder production in Nepal and thereby help to improve rural livelihood
and development. A multiple population approach is recommended. 相似文献