成渝地区葡萄园营养状况初步研究与分析

在成渝地区具有代表性的葡萄园内进行了叶样和土样采集分析,结果表明:与标准值对比,大部分葡萄园内叶片中营养元素P与Mg含量水平较低,微量元素Mn与Fe含量水平则偏高；在大量使用有机肥的葡萄园内,土壤中速效性的营养元素N、P、K含量水平相对较高.     

密集烤房不同循环风机烘烤烟叶的色素降解及感官质量

采用三速和单速循环风机,研究密集烤房不同循环风机对烤烟色素及感官质量的影响.结果表明:采用三速循环风机烤后烟叶的叶绿素a、叶绿素b含量分别为5.10、167.74 μg/g,分别为单速循环风机的72.11％和93.30％;叶黄素、β-胡萝卜素、类胡萝卜素含量分别为0.84、155.56、156.40 μg/g,分别为单...     

基于SWOT-AHP分析的内蒙古农牧业可持续发展研究

摘要：通过运用SWOT分析法，从多个维度确定影响内蒙古农牧业发展的因素，再运用AHP分析法，将SWOT分析的影响因素作为指标层，邀请专家打分构造判断矩阵，将其量化的指标按其重要性进行排序。通过计算总优势、劣势、机遇、威胁力度，绘制战略四边形，并且计算战略四边形重心，判断战略定位，最后进行战略选择。结果显示内蒙古农牧业可持续发展中机遇>优势>劣势>威胁。战略中心位于第一象限内，说明应该采取开拓性战略，战略方位角=49.14°，说明目前处于机遇期。因此内蒙古农牧业应该制定积极的发展战略，依靠内部优势，充分利用外部机会。     

Mapping soil salinity and pH across an estuarine and alluvial plain using electromagnetic and digital elevation model data

Increasing pressures from agriculture and urbanization have resulted in drainage of many floodplains along the eastern Australian coastline, which are underlain by sulphidic sediments, to lower water tables and reduce soil salinity. This leads to oxidation of the sediments with a rapid decline in pH and an increase in salinity. Accurately mapping soil salinity and pH in coastal acid sulphate soil (CASS) landscapes is therefore important. One required map is the extent of highly acidic (i.e. pH < 4.5) areas, so that the application of alkaline amendments (e.g. lime) to neutralize the acid produced can be specifically targeted to the variation in pH. One approach is to use digital soil mapping (DSM) using ancillary information, such as an EM38, digital elevation models (DEM – elevation) and trend surface parameters (east and north). We used an EM38 in the horizontal (EM38h) and vertical (EM38v) modes together with elevation data to develop multiple linear regressions (MLR) for predicting EC_1:5 and pH. For pH, best results were achieved when the EM38 EC_a data were log‐transformed. By comparing MLR models using REML analysis, we found that using all ancillary data was optimal for mapping EC_1:5, whereas the best predictors for pH were north, log‐EM38v and elevation. Using residual maximum likelihood (REML), the final EC_1:5 and pH maps produced were consistent with previously defined soil landscape units, particularly CASS. The DSM approach used is amenable for mapping saline soils and identifying areas requiring the application of lime to manage acidic soil conditions in CASS landscape.     

陕西安康烟区生育期气候综合指数对烤烟化学成分的影响

为了明确烤烟不同生育期气候资源对烟叶品质的贡献率，以陕西安康烟区2002—2011年气象资料和烟叶化学成分为材料，采用主成分分析法，对烤烟不同生育期的平均温度、降水量和日照时数进行分析，构建不同生育期的气候综合指数(CCI)；采用相关分析、通径分析和决策分析对各生育期CCI与烟叶化学成分的关系进行分析。结果表明：不同生育期CCI对烟碱含量的影响以采烤前期最大，旺长期最小，对采烤前期的影响主要为直接作用；对烟叶总糖含量的影响以采烤后期最大，采烤前期最小，对采烤后期的影响主要为直接作用和通过旺长期的间接作用；对烟叶糖碱比的影响以采烤后期最大，旺长期最小，采烤后期的影响主要为直接作用和通过采烤前期的间接作用。     

基于WSN的油菜生长环境数据采集系统

针对传统作物生长环境数据获取手段实时性差、劳动强度大以及部署微型自动气象站和商用Zigbee产品成本高、开放性较差等问题，设计并实现了一种基于WSN的油菜生长环境数据采集系统。提出了轻量级的能量感知路由协议CLFP，并给出了软硬件的相关设计方法。仿真和大田试验结果表明，系统温度采集精度最高可达0.01 ℃，测湿精度达±5%，光强采集范围为1~65 535 lx，可并发的数据传输达到36路，可满足农业现场环境数据的较高测量要求。在标称电源供电情况下，系统实际有效生存周期超过142 d，由于采用AT89C51和nRF2401作为基础硬件平台，成本低廉，有助于大规模部署和应用。     

生产力促进中心咨询诊断服务的SWOT分析

生产力促进中心自建设发展以来，形成了多样化的服务业务。其中，咨询诊断服务不断衍化发展，已经成为服务中小企业的重要手段，积累了一定的优势，也存在着劣势。面对科技服务业迅猛发展的态势，生产力促进中心开展咨询诊断服务面临机遇与挑战并存的局面，通过基于SWOT分析法构建的评价模型，明确主要影响因素，进而推演出下一步发展的具体路径。     

国内外致泻大肠埃希氏菌O157:H7的检测标准比较及建议

致泻大肠埃希氏菌O157:H7（STEC O157:H7）是大肠埃希氏菌中致病性最严重的一种食源性致病菌,主要存在于牛肉、牛奶、水果及其制品中,对身体健康造成很大危害,甚至引发死亡。食品中STEC O157:H7检测尤为重要。本文对国内外STEC O157:H7的检测标准进行比较,提出我国标准在样品前处理、快速筛选方法的应用等方面需要加强,以便为该菌快速准确检测提供帮助,实现与国际标准化体系建设接轨,满足实验室检测需要。     

Antioxidant,anti-amylase and anti-glycation potential of brans of some Sri Lankan traditional and improved rice (Oryza sativa L.) varieties

Brans of 23 traditional and 12 improved (both red and white) rice varieties in Sri Lanka were screened for anti-amylase and anti-glycation activities in vitro. Varieties which showed the highest inhibitory activities at screening were further investigated for anti-glucosidase and glycation reversing as anti-diabetic properties. The same varieties were studied for selected antioxidant properties. Significantly high anti-amylase and anti-glycation activities were observed for bran extracts of red varieties compared to white varieties at screening. Traditional red rice varieties, Masuran, Sudu Heeneti, Dik Wee and Goda Heeneti, exhibited significant and dose dependent anti-amylase, anti-glycation and glycation reversing activities. These varieties also showed marked antioxidant properties. It is concluded that brans of Sri Lankan traditional red rice varieties Masuran, Sudu Heeneti, Dik Wee and Goda Heeneti may be potential food supplements for diabetes.