小麦根-土界面磷的分布规律

在人工气候室采用32P标记土壤和土-根平面系统研究小麦根际磷的分布。结果表明，小麦根-土界面磷呈亏缺分布，但在报表0.5mm以内，大约培养15天左右磷常出现相对累积。磷的亏缺强度在高含水量和低空气湿度时较大。随培养时间的延长，磷亏缺量和亏缺范围随之增大。此外，磷亏缺量以中下部根系较大。根-土界面磷分布以方程C／Co＝a＋blnX或C／Co＝aXb拟合为优;时（t）空（X）作用下的磷分布可用t和X三次非线性多项式拟合。     

北京地区常用草坪草的耗水规律及适宜灌溉量研究

研究了在北京地区不同供水条件下，草地早熟禾、高羊茅、多年生黑麦草、野牛草、结缕草和狗牙根整个生长季的蒸散量差异和耗水规律。结果表明，蒸散量主要与草坪草的生物学特性有关，受水分条件影响；冷季型草坪草中多年生黑麦草耗水最少，暖季型草坪草中结缕草耗水最少；通过比较坪草和北方主要农作物的K_C值，得出草坪与大田作物的需水量相当；北京地区常用草坪草整个生长季的适宜灌溉量为：高羊茅(391.8 mm)>草地早熟禾(368.3 mm)>多年生黑麦草(315.1 mm)>狗牙根(300.7 mm)>野牛草(184.0 mm)>结缕草(110.5 mm)。     

精准农业技术系统集成在新疆棉花种植中的应用

根据新疆生产建设兵团农业机械化、集约化、规模化生产的特点，结合新疆兵团棉花种植的实际情况和基础条件，利用GIS、RS、GPS、ES、MS等最新技术在棉花精准种植试验区开展研究工作。跟踪国内外精准农业的最新研究发展水平，在数字农业技术创新的基础上，整合国内已有的研究成果，利用信息技术对新疆现有的农业生产设备进行组装配套，研制、开发、集成具有新疆特色的数字农业技术体系与推广模式，进行规模化应用示范。在农田信息采集、处理和实施系统3个方面进行棉花精准种植信息系统集成研究，取得了初步成果：利用自主开发与引进的硬件平台，组装集成的配套技术体系，在棉花的精准播种、节水灌溉、变量施肥、病虫害预测预报与防治、长势监测等产前、产中管理决策中应用，形成一套适宜新疆的先进成熟的棉花生产管理智能化决策系统，同时与变量作业机具组装配套进行示范，该成果可为新疆及其它地区棉花精准种植提供参考模式，具有重大的推广意义，市场前景广阔。     

In vivo antioxidative activity of propolis evaluated by the interaction with vitamins C and E and the level of lipid hydroperoxides in rats

In vivo antioxidative activity of propolis was evaluated on the basis of ameliorative effects on the oxidative stress induced by vitamin E deficiency in rats. The control group was fed vitamin E-deficient diet, and the propolis group was fed vitamin E-deficient diet supplemented with 1% of propolis for 4 and 8 weeks. Comparisons were made in tissue concentrations of vitamin C, vitamin E, and lipid hydroperoxides between these groups. No significant difference was observed in tissue vitamin E concentration between these groups after both 4 and 8 weeks. After 4 weeks, the plasma vitamin C concentration of the propolis group was significantly higher than that of the control group. After 8 weeks, the tissue concentrations of vitamin C in the kidney, stomach, small intestine, and large intestine of the propolis group were significantly higher than those of the control group. These results suggest that some components of propolis are absorbed to circulate in the blood and behave as a hydrophilic antioxidant that saves vitamin C. The concentration of lipid hydroperoxides in the large intestine of the propolis group was significantly lower than that of the control group after 8 weeks. These results suggest that propolis exerts its antioxidative effect where it is assumed to accumulate, such as on the kidney, where it is excreted, and on the gastrointestinal tract, where propolis influences these tissues even from the outside of the cell.     

平行高立式沙障对严重沙化草地土壤有机质含量及颗粒组成的影响

 为探索沙化草地植被恢复新途径,进而为制止草地退化制定有效措施提供理论支持,在草地严重沙化后形成的沙丘,且其上设置有不同年龄(2～3年和4～5年)平行高立式芦苇沙障的地段,分别对沙丘不同部位(迎风坡、背风坡和丘间低地)及沙障不同位置(沙障迎风面、背风面和两沙障中间)土壤有机质含量和土壤颗粒组成(机械组成)进行测定,并以同类型未设沙障的地段作对照,对平行高立式沙障治理严重沙化草地的效益进行了研究。结果表明,在严重沙化草地设置平行高立式沙障,可显著提高土壤有机质含量,土壤颗粒组成中,较粗的沙粒含量减少,较细的沙粒含量增加。     

羽毛蛋白粉高效利用研究

采用物理加工与生物加工结合的方法，即先超微粉碎至微米级后再用解朊酶进行体外水解处理的方法对羽毛粉进行饲料化研究，通过研究发现经处理的羽毛粉比对照组（未经处理过的羽毛粉）的可溶性蛋白质含量和溶解度分别比原来增加了3.37倍和3.38倍，胃蛋白酶消化率提高了15%，表明此加工工艺可大大提高羽毛粉的生物学效价。     

湿式多片制动器油槽内三维抛物流的数值计算

采用控制容积法对三维抛物流的基本方程进行了离散化,并针对湿式多片制动器径向油槽内冷却油运动方程的抛物性,计算出摩擦盘在不同运动速度下,油槽内流体的流场,从而为进一步计算出冷却油与摩擦副之间的换热系数和湿式多片制动器的开发设计提供了理论依据。     

Kinetic compensation and the role of cations in pectinesterase catalysis

The catalytic rate constant of thermostable pectinesterase (TS-PE) from Marsh grapefruit pulp was determined at pH 7 at temperatures between 25 and 60 degrees C. TS-PE activity was measured at NaCl concentrations of 0.05, 0.10, 0.15, and 0.20 M and at CaCl(2) concentrations of 0.005, 0.010, 0.015, and 0.020 M. For sodium- and calcium-added conditions, the kinetic functions of this reaction agreed with kinetic compensation relations. The isokinetic temperatures for sodium- and calcium-added conditions were 327.8 and 312.4 K, respectively. Different isokinetic temperatures and compensation parameters suggest that sodium and calcium uniquely affect TS-PE catalysis. This is the first demonstration of kinetic compensation in an enzyme-catalyzed reaction.     

机械式空气整根钵苗移栽器的研究

空气整根钵苗全自动移栽机的核心部件是移栽器。采用机械方式完成全自动移栽机的送秧和投苗，简化了现有全自动钵苗移栽机的电动或气动送秧和投苗装置，降低了成本。移栽器的性能试验表明，所研制的移栽器性能良好，适应国内市场需要。     

山西省土地资源数据库的建立与研究

为了按时完成山西省水土保持规划任务,全省采用单公里网布点到位实测的数理统计法,同步查清了土地利用和治理现状,并将获得的80多万个数据输入IBM—PC/XT计算机,研制山西省土地资源数据库软件。本软件采用汉字显示,可以打印出所需的行政区和流域的数据项和图,为山西省水土保持工作使用计算机管理创造了良好的开端。