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Search Results: 1 - 10 of 75425 matches for " 江泽鹏 "
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Effects of rudimental stubble heights on the yield and source-sink characteristics of ratooning rice:a case study for two-line hybrid rice Peiliangyou 210
留桩高度对培两优210再生稻产量和源库性状的影响

黄志刚,屠乃美,巨鳌,,
生态学报 , 2009,
Abstract: Rudimental stubble height of rationing rice is one of important factors on high-yielding cultivation. Effects of rudimental stubble heights on the yield and source-sink characteristics of ratooning rice were studied in two-line hybrid rice Peiliangyou 210. Three rudimental stubble heights were arranged in the study, which were 40 cm, 20 cm, and 10 cm respectively. The results indicated that rudimental stubble heights affected source-flow-sink characteristics of ratooning rice significantly. With the decreasing of rudimental stubble heights, (1) the growing stage of ratooning rice was postponed, but stubble height, spike length and leaf area index (LAI) were increased, (2) the activities of leaf sucrose-phosphate synthetase (SPS) decreased, while the crop growth rate and the number and area of big vascular bundle of different internodes and the activity of catalase were increased during the grain filling stage. (3) the accumulation and output rates of non-structure carbohydrate content in stem and sheath, the ratio of grain number to leaf area and specific leaf weight, the spikelets per panicle and the yield were increased. In Changsha region, the suitable rudimental stubble height of two-line hybrid rice Peiliangyou 210 is 10 cm.
创伤修复中白细胞蛋白酶抑制因子和中性粒细胞趋化因子差异表达的研究
,向静,文亮,粟永萍,屈纪富,冉新
第三军医大学学报 , 2006,
Abstract:
金 花 茶 嫁 接 繁 殖 试 验 研 究
张乃燕,王东雪,,梁文汇,韦晓娟
北方园艺 , 2010, DOI: 10.11937/bfyy.201021010
Abstract:
不同轻基质配方对油茶全光照扦插生根的影响
赵海鹄,黄欣,刘学勇,叶航,曾雯?,
热带农业科学 , 2013,
Abstract: 以10种轻基质材料为原料配置16种配方,并在全光照间歇喷雾条件下研究这16个配方对普通油茶优良无性系‘岑软3号’扦插生根的影响。结果表明,不同配方轻基质对油茶扦插生根有明显的影响,生根率从6.67%到100%不等,含有椰糠的轻基质配方生根情况明显优于不加入椰糠的配方。在含有椰糠的5种配方中,配方12(椰糠∶菌渣∶泥碳土体积比为4∶2∶1)的生根率最高,达100%,且成本在5个配方中从高到低位列第4,成本较低,最适合作油茶全光照喷雾扦插育苗的基质。
分散固相萃取-高效液相色谱-串联质谱法测定水稻和土壤中的福美双与甲霜灵残留
,,李永飞,杜鹏飞,陈鸽,金茂俊,王静
农药学学报 , 2015,
Abstract: 建立了一种同步分析水稻和土壤中福美双和甲霜灵残留的分散固相萃取-高效液相色谱-串联质谱(hplc-ms/ms)检测方法。样品经乙腈提取,psa、c18吸附剂净化,c18色谱柱分离,0.2%甲酸水-乙腈等度洗脱,质谱采用电喷雾正离子(esi+)模式电离,多反应离子监测模式定性分析,基质匹配标准曲线外标法定量。结果表明:在1~500μg/l浓度范围内,不同基质中的福美双和甲霜灵的线性相关系数均大于0.991。在0.01~1.5mg/kg添加水平范围内,土壤、水稻植株、稻壳和糙米样品中福美双和甲霜灵的日内平均回收率为76%~104%,日内相对标准偏差(rsd)为1.2%~13.2%(n=5);日间平均回收率为74%~102%,日间rsd为2.8%~10.4%(n=5)。该方法简单、快速、灵敏度及准确度高,能够满足水稻及土壤中福美双和甲霜灵残留量的检测要求。
留桩高度对培两优210再生稻产量和源库性状的影响
黄志刚?,屠乃美*?,巨鳌?,,春?
生态学报 , 2009,
Abstract: 水稻主季稻留桩高度是影响再生稻高产的重要因素之一。以两系杂交稻组合培两优210为研究材料,在主季稻收割时设3个留桩高度处理(40cm、20cm和10cm),研究主季稻留桩高度对再生稻产量及源库性状的影响。结果表明,随留桩高度的降低,(1)培两优210再生稻生育期延长,株高、穗长与叶面积指数增加;(2)灌浆期间叶片磷酸蔗糖合成酶活性衰减率减小,作物生长率增加,节间维管束数目和大小及枝梗过氧化氢酶活性增加;(3)茎鞘非结构碳水化合物积累和输出速率增加,比叶重和粒叶比提高,穗总粒数增加,进而增加产量。两系杂交稻培两优210作中稻栽培时其适宜留低桩,留桩高度10cm处理再生稻具有“源”足“流”畅“库”大的特点。
高超声速内外流解耦试验系统设计与验证
,李绪国?,孙 ,唐小伟?
推进技术 , 2015,
Abstract: 在模型上将高度耦合的内外流气动力载荷分开,是吸气式高超声速飞行器直接测力试验的关键。为探索相关设计技术,以圆截面通气模型为研究对象,通过相互独立的内/外流部件实现内外流分离;通过计算机辅助内/外流部件间隙与天平设计,特别是内/外流部件间隙开口位置与尺寸确定,来解决内/外流部件接触问题;通过软填料密封解决内外流窜流问题,并对试验干扰因素进行了分析,在ma=6条件下开展了验证试验。典型试验对比结果表明,部件间隙开口位置和尺寸适当、天平刚度较大时,内/外流部件无接触、不传力;间隙开口采用软填料密封,内外流不窜流、干扰小。试验证明,该系统设计是成功的,能从物理上将内/外流气动力载荷分开,测量误差可分别控制在3%、4%左右。
基于Nussbaum增益滑模自适应控制的 导弹制导控制一体化设计
齐辉,,,,,张德伟
- , 2017, DOI: 10.13195/j.kzyjc.2015.1601
Abstract: 采用Nussbaum增益滑模自适应控制方法解决导弹制导控制一体化设计问题. 充分考虑一体化模型具有通道间耦合、气动建模不确定性、气动参数摄动和目标机动引起的干扰等特点, 基于自适应控制对未知量的辨识能力和滑模控制的抗干扰能力, 以及Nussbaum增益控制对系数不确定系统所具有的较好的控制能力, 设计Nussbaum增益滑模自适应控制律, 并证明系统的稳定性. 仿真结果验证了所提出方法的有效性.
分散固相萃取-高效液相色谱-串联质谱法测定水稻和土壤中的福美双与甲霜灵残留
Simultaneous determination of thiram and metalaxyl residues in rice and soil by dispersive solid phase extraction and high performance liquid chromatography-tandem mass spectrometry

,,李永飞,杜鹏飞,陈鸽,金茂俊,王静
- , 2015,
Abstract: 建立了一种同步分析水稻和土壤中福美双和甲霜灵残留的分散固相萃取-高效液相色谱-串联质谱(HPLC-MS/MS)检测方法。样品经乙腈提取,PSA、C18吸附剂净化,C18色谱柱分离,0.2%甲酸水-乙腈等度洗脱,质谱采用电喷雾正离子(ESI+)模式电离,多反应离子监测模式定性分析,基质匹配标准曲线外标法定量。结果表明:在1~500 μg/L浓度范围内,不同基质中的福美双和甲霜灵的线性相关系数均大于0.991。在0.01~1.5 mg/kg添加水平范围内,土壤、水稻植株、稻壳和糙米样品中福美双和甲霜灵的日内平均回收率为76%~104%,日内相对标准偏差(RSD)为1.2%~13.2%(n=5);日间平均回收率为74%~102%,日间RSD为2.8%~10.4%(n=5)。该方法简单、快速、灵敏度及准确度高,能够满足水稻及土壤中福美双和甲霜灵残留量的检测要求。
A rapid analytical method for the simultaneous determination of thiram and metalaxyl in paddy soil, rice plant, rice husk and brown rice was developed using dispersive solid phase extraction and high performance liquid chromatography-tandem mass spectrometry(HPLC-MS/MS). The analytes was extracted by acetonitrile and cleaned up by PSA and C18, and then separated on a reversed phase C18 column using an isocratic elution program of 0.2% aqueous formic acid and acetonitrile. Qualitative analysis was performed with electrospray ionization in positive mode(ESI+) under multiple reaction monitoring(MRM) mode. Matrix-matched calibrations were respectively used to quantify the residue concentrations. In the concentration range of 1-500 μg/L, the matrix-matched calibration curves showed good linearity with correlation coefficients >0.991. Intra-day mean recoveries of thiram and metalaxyl in different matrices were found between 76% and 104% at 0.01-1.5 mg/kg, with relative standard deviations(RSD) of 1.2%-13.2%(n=5). Inter-day mean recoveries of thiram and metalaxyl were found between 74% and 102% with RSD of 2.8%-10.4% at 0.01-1.5 mg/kg(n=5). The method is simple, rapid, sensitive and accurate, which can meet the detection requirements of thiram and metalaxyl residues in rice samples and soil.
岑溪软枝油茶全同胞家系遗传变异分析
Genetic Variation Analysis on Full-sib Families of Cenxi Soft-branch Camellia oleifera

王东雪,曾雯?B,,张乃燕
- , 2016, DOI: doi:10.3969/j.issn.1001-7461.2016.04.20
Abstract: 以岑溪软枝油茶全同胞家系子代测试林为研究对象,进行果实经济性状遗传变异分析,结果表明:岑溪软枝油茶全同胞家系子代果实性状变异比较丰富,尤其是单果重、鲜籽数和单粒籽重3个指标,其变异系数分别为24.58%、33.14%和35.15%,为选择果大、籽粒重的油茶优良品系提供了物质基础;全同胞家系子代的单果鲜籽数和单粒籽重在各家系间均存在极显著差异,单果重和鲜出籽率在各家系间差异显著;单果重、单果鲜籽数、单粒籽重和鲜出籽率等4个主要性状指标具有较高的遗传强度,其家系遗传力都在0.50以上。分析岑溪软枝油茶同胞优良家系的遗传变异,对下一步岑溪软枝油茶优良单株的评选以及高世代改良都具有重要意义。
Genetic variations of fruit economic characters of full-families of Cenxi soft-branch Camellia oleifera were examined.The results showed that fruit character variations of Cenxi soft-branch C.oleifera were relatively abundant,especially fresh fruit weight,seed number and single seed weight,and the corresponding variance coefficients were 24.58%,33.14% and 35.15%,respectively.It provided the material basis for the selection of fine strains with big fruit and heavy grain weight.There were significant differences among full-sib families in seed number and single seed weight.The fresh fruit weight and fresh seed rate had remarkable differences among families.The genetic strength of fresh fruit weight,seed number,single seed weight and fresh seed rate were high,and the family heritability was more than 0.50.The results had important significance for superior individual selection and high generation improvement
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