果蔬型甜玉米新品种京科甜191的选育

京科甜191是以超甜玉米自交系T68为母本,自交系T6302为父本,通过杂交选育而成的果蔬型甜玉米品种。果穗筒型,穗长19.0 cm,穗粗5.3 cm,穗行数16~18行,行粒数36~38粒,粒行整齐。籽粒亮黄色,外观漂亮。平均每667 m2鲜果穗产量900 kg左右,出籽率约67.4%。鲜籽粒含粗蛋白2.98%,粗脂肪1.37%,总糖6.7%,口感甜脆清爽,皮薄无渣。播种至采收平均85.4 d(天),适宜京津冀及类似生态区种植。     

拖拉机室内台架试验技术现状与展望

作为拖拉机研发的重要验证手段，拖拉机室内台架试验可方便高效地为拖拉机模拟各种工况下的性能表现。首先探究动力总成控制技术、负载模拟技术、试验数据处理技术和试验结果评价技术4种拖拉机室内台架试验关键技术，结合试验技术的最新研究进展，对4种技术进行详细的阐述和分析。接着从动力总成控制算法、负载模拟算法、试验数据处理方法、试验结果评价指标体系4个方面对拖拉机室内台架试验技术进行讨论与展望。最后得出对动力总成算法进行优化、提高动态负载模拟精度、保持试验数据处理方法的前沿性、对试验结果综合客观评价是拖拉机室内台架试验技术的发展趋势，以期为我国拖拉机室内台架试验技术的发展提供参考。     

马疱疹病毒1型主要毒力基因分析及TK基因缺失载体的构建

为了解新疆马疱疹病毒1型（EHV-1）主要毒力基因遗传进化情况并构建TK基因缺失株，本研究以EHV-1 XJ2015株DNA为模板，对其主要毒力基因TK、gI和gE全长进行克隆、测序及生物信息学分析，并扩增TK基因左右重组臂TKL和TKR，构建质粒pUC-TKLR，将扩增后的增强绿色荧光蛋白（EGFP，含有CMV+polyA）插入pUC-TKLR质粒，构建TK基因缺失打靶质粒。TK、gI和gE基因同源性分析结果显示，XJ2015株与国外EHV-1分离株TK、gI和gE基因同源性均较高，分别为99.8%~100.0%、99.6%~100.0%和99.9%~100.0%；与EHV-3分离株同源性均最低，分别为72.9%、59.4%和62.1%；遗传进化分析显示，3个基因均与国外EHV-1同属于一个遗传进化分支，与EHV-9和EHV-4进化关系较近，但与EHV-3进化关系较远，表明XJ2015毒株与国外EHV-1毒株TK、gI、gE基因核苷酸上差异不明显，没有明显的地域性特征，功能基因保守且进化缓慢，同源基因功能相同或相近；经PCR扩增、酶切、测序及转染鉴定，本试验成功构建了用于TK基因缺失的打靶质粒pUC-TKLR-EGFP。通过对EHV-1主要毒力基因的分析及TK基因缺失打靶载体的构建，为新疆地区马鼻肺炎流行病学调查分析、TK基因缺失株的构建提供理论依据。     

Influence of soil phosphorus status,texture, pH and metal content on the efficacy of amendments to pig slurry in reducing phosphorus losses

Cost‐effective strategies for using chemically amended organic fertilizers need to be developed to minimize nutrient losses in surface and groundwater. Coupling specific soil physical and chemical characteristics with amendment type could increase their effectiveness. This study investigated how water‐extractable phosphorus (P) was affected by chemical amendments added to pig slurry and how this effect varied with soil properties. A 3‐month incubation study was conducted on 18 different mineral soils, stored at 10 °C and 75% humidity and treated with unamended and amended slurry which was incorporated at a rate equivalent to 19 kg total P (TP )/ha. The amendments examined were commercial‐grade liquid alum, applied at a rate of 0.88:1 [Al:TP ], and commercial‐grade liquid poly‐aluminium chloride (PAC ), applied at a rate of 0.72:1 [Al:TP ]. These amendments were previously identified by the authors as being effective in reducing incidental losses of P. The efficacy of the amendments varied with the soil test P, the degree of P saturation (DPS ) and the Mehlich aluminium, iron and calcium, but not soil texture. Chemical amendments were most effective in soils with DPS over approximately 20%. Due to their high cost, the incorporation of amendments into existing management practices can only be justified as part of a holistic management plan where soils have high DPS .     

预应力薄腹梁质量事故的分析及鉴定

阐述了某工程由于施工原因，导致预应力混凝土工字形屋面梁强度不足的预制构件的检验鉴定过程和方法。采用回弹法推定混凝土实际强度；通过静载试验测试构件的实际挠度、抗裂和承载能力。分析了导致混凝土强度不足的原因。     

铯－134在幼龄茶树叶片中的分布特点

茶树上喷洒￣（１３４）Ｃｓ后，老叶上的沉积量和新叶上的吸收量均按指数回归形式下降，下降的速率以老叶上最快，春茶叶和夏茶叶上次之，秋茶叶上最慢；灌溉和土壤中拌入￣（１３４）Ｃｓ后，茶叶对￣（１３４）Ｃｓ的吸收分两个阶段进行，前期随着时间延长而增加。后期则减少。吸收量有个最大值；茶叶中￣（１３４）Ｃｓ的含量在喷洒情况下比灌溉和拌土的高。     

An evaluation of the Olsen test as a measure of plant-available phosphorus in grassland soils derived from basalt parent material

Abstract. Anecdotal and circumstantial evidence have suggested that the Olsen test underestimates plant-available phosphorus (P) in basaltic soils in Northern Ireland. Therefore, the ability of this test to predict plant-available P in basaltic (and non-basaltic) soils was investigated by regressing Olsen-P data against herbage P indices calculated from plant tissue test data using the diagnosis and recommendation integrated system. The average Olsen-P concentration for a range of fields situated on basaltic soils was considerably lower than the average Olsen-P concentration for a range of fields situated on non-basaltic soils, and yet mean sward P status, as given by the herbage P indices, was similar for both groups of fields. Herbage P indices were also much better correlated with Olsen-P measurements in non-basaltic soils than in basaltic soils. Furthermore, at low Olsen-P values (≶9mgPL⁻¹) some swards on basaltic soils were genuinely deficient in P, while others were sufficient or even in surplus for this nutrient. The results confirm that Olsen-P is inadequate as a predictor of plant-available P in basaltic soils. It is concluded that an alternative soil test is needed to provide a reliable assessment of plant-available P in basaltic soils, to prevent overuse of fertilizer and manure P and to minimize the amounts of P entering local watercourses.     

辣椒夏季品比试验报告

为了考察我公司新推广品种及新配组合在高温伏旱状况下的适应性，我们于2003年5月7日在公司试验基地进行了品种对比试验。结果表明新推广品种中有九个品种或组合为极耐热或耐热，一个品种耐热性稍差。新配组合中部分表现优良，有推广前景。     

沼肥对苹果生物性状的试验初报

笔者对苹果施用沼肥后的生物性状进行了长达4a的对比试验研究，采取对比设计法，在叶、枝、花、果等器官的相关指标取得了极为明显的效果，在果业生产上有极好的推广价值。