Animal Health Equipment Management     

《Veterinary Clinics of North America: Food Animal Practice》2015,31(2):259-267

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清镇市退耕还林工程治理模式     

杨国方  汪春云杨宇 《贵州林业科技》2005,33(2):53-56

通过调查总结2000年以来清镇市在退耕还林工程建设中产生的治理模式，为清镇市在今后的退耕还林工程建设中提供营造原则依据和布局配置等实用技术。  相似文献   

草坪的养护管理     

屠梦琦 《湖南农机》2014,(8)

随着现代社会经济的快速发展,草坪作为园林绿化的基础,在正确合适地建造草坪之外,为了保证草坪的坪用状态和持续利用,日常和定期的养护管理是必不可少的。常用的养护管理技术有覆盖、修剪、灌水、施肥、表施细土、通气等。  相似文献   

Insecticide use impacts of Integrated Pest Management (IPM) Farmer Field Schools: Evidence from onion farmers in the Philippines     

J.M. Yorobe Jr.  R.M. RejesusM.D. Hammig 《Agricultural Systems》2011,104(7):580-587

This article empirically examines the impact of Farmer Field Schools (FFS) on insecticide use by onion farmers in the Philippines. FFS is an intensive Integrated Pest Management (IPM) information dissemination method that encourages producers to lower their reliance on chemical insecticides for controlling pests and diseases in their farms. These FFS-IPM trainings have been conducted within vegetable-based production systems in the Philippines. The data used in the study are from a 2009 face-to-face farm-level survey of 200 onion growers in Nueva Ecija province. Using instrumental variable (IV) procedures to control for endogeneity and selection problems in the data, we find that FFS-trained onion farmers in the Philippines have significantly lower insecticide expenditures (∼PhP5,000) than non-FFS trained control farmers. When econometric problems due to endogeneity and selection are not controlled for, the FFS training did not show any statistically significant effect on insecticide use. The insecticide reducing effect of FFS has important environmental and health implications, and provides evidence about the effectiveness of the FFS training method in disseminating important IPM concepts in the country.  相似文献   

新烟区基层烟叶收购站管理工作中的问题与对策     

林靖东 《安徽农业科学》2015,(29):350-351

结合基层烟叶生产实践的经验,分析了烟叶收购站管理工作中的问题对加强新烟区基层烟叶收购站管理进行研究,并提出相应的对策.  相似文献   

ICP-AES法测定电镀厂周围土壤中Zn·Ni·Cr·Cu     

韦连喜  典平鸽 《安徽农业科学》2011,(8):4669-4670

[目的]建立一种土壤样品的测定方法。[方法]将电镀厂周围土壤样品,磨碎,过130目筛,取1.000 g土壤样品于聚四氟乙烯坩埚中,加入10 ml H2O2放置过夜,在微波炉中消解至近干;加15 ml浓HCl、5 ml浓HNO3消解至近干,再加5 ml HF,继续消解至粘稠状,用去离子水低温溶解残渣,转入25 ml容量瓶中,加5%HNO3定容,用ICP-AES法测定土壤中的Zn、Ni、Cr、Cu。[结果]在选定的测定条件下,检出限分别为0.005 2、0.013、0.006 9、0.009 6 mg/L;精密度的相对标准偏差分别为2.4%、2.9%、2.1%、3.4%;回收率在98.3%～103.7%。[结论]该测定方法灵敏、精密、准确度高;电镀厂周围土壤已经受到了影响,应严格加强管理。  相似文献   

植物资源与林业生产效益浅析     

姜承云 《农业科技与信息》2011,(6)

植物资源的合理开发与利用,对提高林业生产效益和社会效益以及保护植物物种生命的延续,维持自然生态平衡具有深远的意义。建议林业生产一定要根据环境条件,与时进取,实行多项目经营方式,用现代的林业思想保持和改善林分质量与林分景观结构的多样性,增加林业生产效益、社会效益、生态效益。  相似文献   

农业科研单位人事档案管理中存在的问题及对策思考   总被引：3，自引：2，他引：1  

岳晓历 《河北农业科学》2010,14(3):171-172

针对当前农业科研单位人事档案管理的现状,分析了实际工作中存在的问题,并提出了相应的解决对策,以提高人事档案的利用水平,为以后体制改革提供一定得参考依据。  相似文献   

Temporal dynamics and variation with forest type of phospholipid fatty acids in litter and soil of temperate forests across regions     

《Soil biology & biochemistry》2015

Microorganisms form the basis of soil food webs and represent key control points of carbon cycling and sequestration. Virtually all central European forests are managed and land-use regimes likely impact microbial abundance and community composition. Consequently, knowledge on how land-use intensity and abiotic variables, such as pH, C-to-N ratios, moisture regimes and concomitantly different stress levels, affect microbial communities is needed. We investigated phospholipid fatty acid (PLFA) profiles of leaf litter and soil from four forest types differing in foliage, age and management intensity, replicated in three regions across Germany. To account for temporal variation, samples were taken twice in the same season, but with an interval of three years. Total microbial biomass and microbial community composition differed between years, presumably due to between year variations in weather conditions. The litter layer was more prone to effects of drying, with a reduction of almost 30% of total PLFAs in the drier year. In soil effects of weather conditions depended on soil type and therefore differed between regions, with microorganisms in the sandy soils of the Schorfheide being more susceptible to water-stress, as evidenced by a ten-fold increase of the stress indicator cy/pre ratio in the drier year. Despite temporal variations in microbial biomass and community composition, the balance between the fungal and bacterial energy channel, as measured by fungal-to-bacterial ratios, remained rather constant in particular in soil. While total microbial biomass did not differ between forest types, microbial community composition differed significantly between beech and coniferous forests. Despite more acidic conditions, the fungal energy channel was less pronounced in leaf litter of coniferous forests than in broad-leaved forests, whereas the proportion of bacterial fatty acids was the highest in coniferous forests. Increasing management intensity presumably fosters the bacterial energy channel in the exposed litter layer. Supporting this assumption coniferous forests featured significantly higher values of the stress indicators cy/pre and SAT/MONO ratio. Bacterial community structure and biomass closely correlated with pH, with particular PLFAs dominating at high and low pH, respectively, indicating pH-specific microbial communities. In contrast, fungal abundance in leaf litter was correlated with C-to-N ratio. The results suggest that leaf litter and soil need to be considered separately when investigating changes in microbial community composition, since susceptibility of microorganisms to environmental stressors differs markedly between these layers. This, and repeated sampling events, may be particularly important when investigating subtle effects such as those related to climate change.  相似文献   

关于事业单位固定资产管理的探讨     

程敏 《河北农业科学》2008,12(1):171-172

对事业单位固定资产在使用管理责任制、核算方法和使用管理方式等方面进行了几点探讨。  相似文献