不同处理玉米的有机物质瘤胃降解率及小肠消化率的研究

用３头带瘤胃瘘管的杂种肉牛测定玉米、无机保护剂处理玉米、有机保护剂处理玉米、１０％和３０％鲜血处理玉米有机物质（ＯＭ）和非蛋白质有机物质（ＮＰＯＭ）的瘤胃动态降解率,ＯＭ分别为５３．０３％,４３．９１％,５３．５７％,３５．７３％和３８．８５％,ＮＰＯＭ分别为５３．６７％,４８．０６％,５５．７２％,３９．２４％和４４．４８％。用酶解法（牛小肠液冻干粉（ＢＩＦ））测得玉米、无机保护剂处理玉米、有机保护剂处理玉米、１０％和３０％鲜血处理玉米１２小时瘤胃非降解ＯＭ的消化率分别为７４．３９％,７６．２６％,７５．５４％,７７．８８％和７７．４３％,ＮＰＯＭ分别为６３．９２％,６４．７８％,６４．４３％,６７．７８％和６５．００％。     

地毯式草坪的生产技术

通过几年来不定期文献检索和试验得出：地毯式草坪具有重量轻,建坪质量高,节约土地等优点。生产中基质可用７０ ％ 火土或腐质土＋ ３０ ％ 田园 土,隔离布用废旧纺织袋最佳,光照强度在５０００ｌｕｘ ～１００００ｌｕｘ 为宜,管理方法与常规建坪相同。     

不同育苗基质对浅液流水培莴苣生长的影响

摘要：为筛选出适宜莴苣浅液流水培的育苗基质,研究对比了6种商品化育苗基质（花泥30、泥炭块38、泥炭块30、椰糠块30、岩棉块36、岩棉块25）对奶油莴苣“富兰德里”生长的影响。结果显示：在同期播种、同期定植、同期采收条件下,使用泥炭块38、泥炭块30、椰糠块30等商品化基质育苗更有利于莴苣苗期和定植后的生长,其次为岩棉块36、岩棉块25处理,使用花泥30育苗效果最差;在同期播种、4叶1心期定植、同株质量标准采收情况下,使用泥炭块38、泥炭块30等商品化基质育苗的莴苣生长周期最短,其次为椰糠块30、岩棉块36、岩棉块25处理,使用花泥30育苗的莴苣生长周期最长。综合来看,对于浅液流水培莴苣,使用泥炭块38、泥炭块30、椰糠块30商品化基质育苗效果较好,莴苣苗期和定植后长势好,生长周期短,考虑到育苗成本,推荐使用泥炭块30或椰糠块30进行育苗。     

贵州省万峰湖库区农业面源污染防治技术集成研究

采用多学科的综合性集成技术是治理万峰湖水体面源污染的根本措施。通过技术的实施，使人畜粪便基本得到有效处理，坡耕地水土流失得到有效控制，化肥、农药施用量及作物秸秆利用更趋合理，网箱养鱼方式的转变使饲料过量投放得到有效控制，水体污染风险显著降低。农民的经济及生态效益明显提高，生活环境显著改善。     

Land Cover Type and Fire in Portugal: Do Fires Burn Land Cover Selectively?

The purpose of this study is to investigate if, or under what conditions, fires select given land cover types for burning. If fires burn unselectively then the land cover composition (the proportional area of various land cover types) of individual fires should approximate the land cover composition available in their neighborhood. In this study we test this hypothesis by performing statistical analyses of a data set consisting of paired vectors with the proportions of land cover types present in burned areas and in their respective surroundings. The statistical methods employed (a permutation technique and the C_max statistic) are commonly used in resource selection studies where data is subject to a unit-sum constraint. The results of the analysis of 506 fires that burned in Portugal in 1991 indicate that fires are selective, with small fires exhibiting stronger land cover preferences than large fires. According to the results of a multiple comparison analysis performed for small fires, there is a marked preference for shrubland followed by other forest cover types, while agriculture is clearly avoided. A similar analysis is performed to test if fire selectivity is related to the ecological region where it occurs. The results obtained in this study contribute to the discussion on the relative importance of fuels as a drivers of fire spread.     

A riverscape perspective on habitat associations among riverine bird assemblages in the Lake Champlain Basin,USA

The riverscape perspective recognizes the heterogeneous habitat types within the stream corridor as a single, integrated ecological unit operating across spatial scales. Although there is ample evidence that the riverscape notion is appropriate in understanding the physical phenomena of stream corridors, significantly less attention has focused on its ecological ramifications. To this end, we surveyed riverscape habitat variables and bird community characteristics in the Champlain Valley of Vermont, USA. From the data collected, we used information theoretic methodology (AIC_c) to model relationships between bird community attributes and key habitat variables across the riverscape. Our models with the greatest support suggest that riverine bird communities respond to a suite of characteristics; representing a variety of riverscape habitats at the in-stream, floodplain, and riparian levels. Channel slope, drainage area, percent conifers, and in-stream habitat condition were among the most influential variables. We found that piscivores are potentially important indicators of riverscape condition, responding to a host of variables across the riverscape. Our results endorse a holistic approach to assessing and managing the mosaic of patches in the riverscape and suggest that a riverscape approach has significant conservation potential.     

动物疫苗用蜂胶的质量要求及工业化提取技术的研究

本研究对动物疫苗用蜂胶质量提出了“外观，相对密度，味道，熔点”４项简易指标和“磺值，蜂蜡，可氧化性，黄酮类反应阳性，酚类化合物，杂质含量”６项理化指标，摸索出一整套有效的蜂胶工业化纯化提取工艺技术，实践证明，该工艺技术具有快速，简便，经济，实用等特点。     

孜然套种糯玉米间毛豆高效栽培技术

孜然芹．糯玉米．毛豆三种作物在一个生产年度内在同一田块上种植,能显著提高光合产量,土地利用率和经济效益。本文主要对孜然套糯玉米再间作毛豆的栽培技术和生产环节进行了详细阐述,并提出了一些高效的耕作和管理思想,以期为生产户服务。     

坝上生态农业工程生态效益监测与评价研究

利用遥感技术、地理信息系统和全球定位系统对河北坝上实施生态农业工程建设后的生态效益进行了监测与评价。定量描述了坝上生态环境的动态变化趋势，并对坝上生态农业工程的气候效益、土壤改良效益、农业水文生态效益进行了分析与评价。研究结果表明，通过工程治理，使农业生态系统的功能增强，结构合理，取得了显著的生态效益。     

荸荠罐头加工技术

以提高荸荠罐头质量为目的,从原料验收及预处理、提高净片率、降低碎片率、改善内容物色泽、提高杀菌效果等方面分析,并改进生产过程中存在的技术薄弱环节和不合理的技术操作规程,取得了一定的效果。