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为了推荐节水小麦新品种用于缓解河北省农业用水压力,探究节水小麦新品系‘石17T5252’的节水丰产特性。本实验检测了新选育小麦品系‘石17T5252’和河北省节水对照品种‘石麦22’全生育期不灌水(W0)、灌拔节水(W1)、灌拔节和灌浆水(W2)的产量、形态、灌浆和品质性状,并对拔节期、抽穗期和灌浆中期叶片的荧光参数进行检测。结果表明,W1和W2处理下‘石17T5252’产量显著高于‘石麦22’,分别增产10.32%和7.56%;其中W1通过增加千粒重增加产量,W2通过增加穗粒数和千粒重增加产量。W1和W2较W0的株高没有增加,但‘石麦22’的穗长和‘石17T5252’的穗粒数较W0显著增加,分别增加了0.72～0.84 cm和1.33～5.03粒;W2较W1显著增加‘石麦22’籽粒的长度和宽度,分别增加0.36 mm和0.32 mm,‘石17T5252’增加了0.31 mm的籽粒宽度。荧光参数检测仅在W0处理下发现‘石麦22’抽穗期的Fv/Fm显著高于‘石17T5252’。除容重外在3种灌溉制度下‘石17T5252’蛋白含量、湿面筋含量和面筋指数显著优于‘石麦22’。说明‘石17T5... 相似文献
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山西省冬小麦品种（系）耐热性评价 总被引：1，自引：0，他引：1
了解山西省小麦推广品种和区域试验品系的耐热性,以期为今后的小麦抗逆育种提供依据。通过分期播种,以千粒重热感指数为指标,对62份山西省小麦推广品种和区域试验品系进行耐热性评价。结果表明,正常播期下,3种类型品种(系)平均千粒重依次为热敏感型(43.5g)中耐热型(40.6g)耐热型(38.7g),而在热胁迫条件下(播期2),正好相反。不同基因型间的耐热性存在较大差异,千粒重热感指数变幅在0.03~2.56,变异系数为65.08%。晋麦47、鲁原502、汾4862等17个品种(系)属于耐热型品种,济麦22、晋太182、鑫麦296等18个品种(系)为中耐热型品种,冀麦325、冀麦585、晋麦79等27个品种(系)为热敏感型品种。 相似文献
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从产量和品质性状的变化分析北方冬麦区小麦品种抗热性 总被引：6，自引：1，他引：5
培育抗热性强的品种对应对气候变化,保障小麦稳产性具有重要意义。选用北方冬麦区53份主栽品种和苗头品系,于2008—2009年度分别种植在北京、石家庄、衡水、安阳和泰安5点,各点设正常温度和塑料棚热胁迫处理。结果表明,千粒重可作为抗热性筛选的简易指标。农大189、CA0518和京冬8号的产量和千粒重在正常和热处理环境中均较高,抗热性好;衡观33和CA0736的产量在正常和热处理环境中均较高,但千粒重均表现中等,抗热性较好;农大211、石麦15、济麦22、农大3432和山农2149在正常环境中的产量和千粒重均较高,但在热处理环境中产量和千粒重均较低,抗热性差。53份品种按和面时间和峰值曲线面积可分为强筋、中强筋、中筋、中弱筋和弱筋5大类。热处理使所有类型材料的蛋白质含量和籽粒硬度增加,峰值带高、8min带高和8min带宽降低,并降低强筋、中强筋和中筋类型材料的和面时间与峰值曲线面积,增加中弱筋和弱筋类型材料的和面时间与峰值曲线面积。 相似文献
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为筛选适宜济南市及周边地区推广的优良小麦品种,本研究以山东省近年来育成的23个小麦品种为材料,连续2年进行品种展示试验,测定了产量、品质及养分效率共18个性状。结果显示,除不育小穗数外,6个产量性状以及6个养分效率性状在品种间的差异均达到极显著水平,株高、单位面积产量和6个养分效率性状在年份间的差异也达到显著水平;相关性分析发现,淀粉含量与不育小穗数、沉降指数与单位面积产量之间存在显著负相关关系,湿面筋含量与子粒氮含量之间、蛋白质含量和沉降指数与子粒氮含量之间分别存在显著和极显著正相关关系,而湿面筋含量、蛋白质含量和沉降指数与子粒氮利用效率之间存在极显著负相关关系;山农29、儒麦1号和菏麦20的单位面积产量分别比对照济麦22高出10.33%、8.55%和5.82%;山农31的蛋白质含量、湿面筋含量和沉降指数分别为15.80%、39.30%和65.15,优于其他品种;山农20、山农29、山农23、红地95、烟农173、齐麦2号和登海202的子粒氮、磷和钾利用效率均高于被测品种的平均水平。 相似文献
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为筛选适宜济南市及周边地区推广的优良小麦品种,本研究以山东省近年来育成的23个小麦品种为材料,连续2年进行品种展示试验,测定了产量、品质及养分利用效率共18个性状。结果显示,除不育小穗数外,6个产量性状以及6个养分利用效率性状在品种间的差异均达到极显著水平,株高、单位面积产量和6个养分利用效率性状在年份间的差异也达到显著水平;相关性分析发现,淀粉含量与不育小穗数、沉降指数与单位面积产量之间存在显著负相关关系,湿面筋含量与子粒氮含量之间,蛋白质含量和沉降指数与子粒氮含量之间分别存在显著或极显著正相关关系,而湿面筋含量、蛋白质含量和沉降指数与子粒氮利用效率之间存在极显著负相关关系;山农29、儒麦1号和菏麦20的单位面积产量分别比对照济麦22高出10.34%、8.55%和5.82%;山农31的蛋白质含量、湿面筋含量和沉降指数分别为15.80%、39.30%和65.15,优于其他品种;山农20、山农29、山农23、红地95、烟农173、齐麦2号和登海202的子粒氮、磷和钾利用效率均高于被测品种的平均水平。 相似文献
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ω-黑麦碱是造成小麦1B/1R易位系加工品质差的一个重要因素,为探索解决这一问题,构建了ω-黑麦碱基因沉默表达载体,并通过农杆菌介导转化小麦品种金禾9123,获得3个T_0代转基因植株,再经连续的扩繁和PCR检测,获得纯合转基因T_4代株系。酸性PAGE检测结果表明,这些纯合转基因株系中ω-黑麦碱的总表达量平均下降53%。这些ω-黑麦碱基因沉默的转基因株系的面筋指数、沉降值和稳定时间均显著提高,而其农艺性状,如株高、穗粒数、千粒重和小区产量,均没有受到不良影响,说明沉默ω-黑麦碱基因可以在不影响产量的前提下提高小麦1B/1R易位系的加工品质。 相似文献
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研究不同播种方式对不同品种小麦产量和品质的影响,为小麦高产高效栽培提供参考。采用二因素随机区组设计,播种方式为匀播（A1）和常规条播（A2）,小麦品种为衡观35(B1)、邯6172(B2)、轮选103(B3)和石麦25(B4)。结果表明,2种播种方式对植株性状影响差异显著,条播的株高和穗粒数均显著高于匀播,匀播的产量、穗数和千粒重均显著高于条播,其中匀播处理的产量比条播提高4.42%。播种方式对小麦的容重、面筋指数、出粉率和14%吸水率有显著影响,匀播处理的小麦出粉率比条播高2.02个百分点。条播处理下石麦25的产量最高,衡观35的磨粉品质较好;匀播处理下衡观35、邯6172和轮选103的产量均较高,邯6172的粉质指标较好。 相似文献
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源库改变对小麦子粒主要品质性状的影响 总被引：4，自引：0，他引：4
利用蛋白质含量和产量各不相同的3个冬小麦品种，研究源库改变对蛋白质、湿面筋含量、沉降值和千粒重等品质性状的影响。结果表明：源库改变明显影响着子粒蛋白质和千粒重，而对湿面筋含量和沉降值的影响不大；品种间蛋白质含量对源库变化的反应不同；千粒重的增减因品种而异；面筋的沉积主要受库的限制；旗叶在产量和蛋白质形成中起着同等重要的作用。 相似文献
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蜂蜜模拟麦蚜蜜露危害对小麦产量
和主要营养品质的影响 总被引：4，自引：0，他引：4
在孕穗、抽穗扬花、灌浆3个小麦生育期,分别用蜂蜜模拟麦蚜蜜露危害小麦,最后分小区收获、脱粒、室内考种并测定小麦产量和主要营养品质指标。结果表明,随着蜜露危害程度的加重,小麦千粒重、面粉淀粉含量、湿面筋含量、蛋白质含量在小麦3个生育阶段均呈下降趋势。3个生育期分别被害后,小麦籽粒千粒重、蛋白质含量受影响程度最明显,湿面筋含量次之,淀粉含量变化不大。蜜露危害对小麦产量与主要营养品质的影响,在小麦3个生育期之间存在一定差异。 相似文献
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This paper introduces the theoretical basis and application method for heat transfer model of buried tube (pipe in pipe and U- type) heat exchanger for ground source heat pump, and a practical example is calculated. Then, the calculation results are analyzed and discussed. In particular, the correlation coefficient and calculation method of tube group exchanger is discussed; the method for determining known parameter and some basic data for main procedure GSHP.HTM is analyzed. The calculation formula and data sampling for JSW.HTM subroutine is introduced. At last, the problems in application of calculation procedure, to which should pay attention, are discussed. 相似文献
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This paper describes the double layer horizontal ground source heat pump systems constructed in 1998 with the buried depth of 0.9 m and 1.8 m. The program of study includes experimental equipments, heat exchanger size, testing meter and methods for data analysis. In addition, the heating and cooling performance at typical days are also illustrated. Among the influencing factors on the performance of the ground source heat pump systems, the parameter of heat exchanger and operation patterns of heat pump systems are analyzed.A heat transfer model has been set up for horizontal heat exchanger. 相似文献
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The river water source heat pump system is an important technique to utilize renewable energy in Chongqing and heat exchanger can influence overall energy efficiency of system obviously. A test was carried out to study the heat transfer efficiency of double pipe heat exchanger with semicircular reentrant tube. It was found that the heat transfer efficiency would increase while curvature of semicircular reentrant tube rose. And when the ratio of R to r was five, heat transfer efficiency for semicircular reentrant tube would be increased 2.5% than that of straight double pipe heat exchanger. Flow, temperature field and heat transfer process of semicircular reentrant tube were simulated with computational fluid dynamics(CFD) tool to study the heat transfer mechanism. The modified RNG κ ε Turbulence Model was adopted to ensure the accuracy of simulation analysis under the situation of rotary flow and great curvature. Thus, it was indicated that there was obvious secondary flow vertex in reentrant tube. And disturbance of vertex on boundary layer was the main reason for which heat transfer efficiency of double pipe heat exchanger would increase as curvature of semi toroidal reentrant tube rose. Based on the experiment and simulation, the recommended curvature for reentrant tube was proposed with the consideration of sediment in river water and heat transfer efficiency of heat exchanger. 相似文献
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以Seui82×Siete Cerros重组近交系为供试材料,采用电解质渗漏测定细胞膜热稳定性的方法,对耐热性获得与大田生产条件下的耐热性表现的关系进行了研究,发现供试材料幼苗相当热损伤率的变幅为39.0%～75.8%,基因型间在该性状上表现出显著的差异.在幼苗相对热损伤率和大田环境条件下耐热性表现的相关分析中,发现相对热损伤率与大棚升温及第2播期的千粒重、穗粒重热感指数呈显著的正相关,并和第2播期产量性状表现显著的负相关,和升温处理的产量性状也表现出较高的负相关.研究认为细胞膜热稳定性是一个耐热性评价的理想生理指标. 相似文献
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The heat transfer process in the louvered fin heat exchanger is analyzed,and the corresponding physical and mathematical models on the coupled conduction-convective heat transfer for the louver fin geometry are proposed.The control volume-based finite element method(CVFEM) is employed to solve numerically the problem.The computed(results) reveal the flow structure and heat transfer in the geometry in detail.Compared with the empirical correlation of heat transfer and friction coefficients previously proposed,the computed results show better consistency with the experimental results. 相似文献
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In recent years, lots of heat pump systems have been applied for district heating. In order to insure safe and efficient running of these systems, perfect load control methods are necessary. In this paper, the load matching problem between heat pump syst 相似文献
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The experimental study of the flow resistance and heat transfer characteristics are conducted for water and ethylene glycol solution (66% Wt) flowing in the heat exchanger with small rectangular microchannels . The heat exchanger having the channels of 0.4 mm in width, 2.0 mm in height, and 20 mm in length is heated by a hearing rod at the bottom surface, the upper and two side surfaces are adiabatic. During experiments, the Reynolds number are ranged from 2 to 2 500. The experimental results show that the flow friction factor decreases and Nusselt number increases with increasing Reynolds number for water and ethylene glycol solution. At a fixed Reynolds number, the Nusselt number for ethylene glycol solution with larger Prandtl number is greater than that for water. Meanwhile, the correlations of flow resistance and heat transfer in the heat exchanger with small channels are obtained for engineering application. 相似文献
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Ruan Denfang 《保鲜与加工》1999,(1):66-71
Combined image method with heat source function method,heat conduction due to moving heat sources is analysed in semi infinite body and cylinder with heat exchanging on its surface.The distribution of temperature is obtained when the wall temperature is constant and the wall heat flux is zero.The result is useful for engineering calculation. 相似文献