为探索适宜晋北地区推广应用的藜麦栽培管理模式,实现藜麦产量和品质提升,本试验选用当地自有品种华青1号,采用单因素完全随机设计,以有机肥和无机肥配施比例为变量,设常规施肥CK(有机肥0 kg hm^(-2),尿素和磷酸二胺各450 kg hm^(-2))...为探索适宜晋北地区推广应用的藜麦栽培管理模式,实现藜麦产量和品质提升,本试验选用当地自有品种华青1号,采用单因素完全随机设计,以有机肥和无机肥配施比例为变量,设常规施肥CK(有机肥0 kg hm^(-2),尿素和磷酸二胺各450 kg hm^(-2))、有机肥和无机肥配施比例T1(有机肥1500 kg hm^(-2),尿素和磷酸二胺各225 kg hm^(-2))、T2(有机肥2250 kg hm^(-2),尿素和磷酸二胺各225 kg hm^(-2))、T3(有机肥3000 kg hm^(-2),尿素和磷酸二胺各225 kg hm^(-2))4个处理,分析藜麦生育进程、农艺性状的差异,揭示藜麦产量和品质同步提升的农学性状,探求藜麦高产优质适宜的有机无机配施比例。结果表明,生物菌肥与无机肥配施可增加土壤表层有机质含量,降低碱解氮和有效磷含量及土壤pH,显著增加速效钾含量,且随生物菌肥施用量的增加,土壤中有机质、碱解氮、有效磷和速效钾含量提高,pH降低;与常规施肥CK相比,配施生物菌肥能够缩短藜麦生育期,提高成熟期藜麦株高、茎秆直径和茎秆强度,从而降低倒伏率;增加藜麦分枝数、千粒重,提高了产量;可增加蛋白质和脂肪含量,T2处理表现明显;降低淀粉含量,以T2处理最低,但与其他两处理间差异不显著;生物菌肥与无机肥配施可提高植株对肥料的利用,随生物菌肥施用量的增加,氮肥利用效率、磷肥利用效率及氮磷肥偏生产力先升后降,均以T2处理最高。相关分析结果表明,藜麦籽粒产量与千粒重的关系最密切,籽粒蛋白质含量与产量、千粒重、分枝数和茎秆强度也呈正相关,籽粒淀粉含量与千粒重呈负相关。因此,本试验条件下,晋北地区有机无机配施量为氮磷肥各225 kg hm^(-2)配施生物有机菌肥2250 kg hm^(-2)时利于藜麦实现产量品质同步提升。展开更多
The structural transformation and electronic structure of ZnO under hydrostatic pressure are investigated using the HSE06 range-separated hybrid functional.We show that wurtzite ZnO under pressure undergoes a structur...The structural transformation and electronic structure of ZnO under hydrostatic pressure are investigated using the HSE06 range-separated hybrid functional.We show that wurtzite ZnO under pressure undergoes a structural transition to a graphite-like phase.We also find that the band gap of wurtzite phase is always direct,whereas the new phase can display either direct or indirect band structure.Furthermore,the gap is greatly enhanced by pressure and no semi-metallic phase is observed.This is drastically different from our previous results of AlN and GaN[Appl.Phys.Lett.100(2012)022104].展开更多
Rhombohedral BaTi0_(3)under hydrostatic pressure is investigated by first principles calculations.Our results show that just like tetragonal perovskites,as pressure increases,this material first becomes para-electric ...Rhombohedral BaTi0_(3)under hydrostatic pressure is investigated by first principles calculations.Our results show that just like tetragonal perovskites,as pressure increases,this material first becomes para-electric at low pressures,then transfers to another ferroelectric phase at much higher pressures.We also find a giant enhancement of piezoelectricity near the phase-transition regions,due to large atomic displacements along different directions in response to the applied pressures.展开更多
目的:检验网络游戏障碍量表(20-item Internet Gaming Disorder Test,IGD-20)在中国大学生人群中的信度和效度。方法:用IGD-20中文版对1120名大学生实测,同时测定陈淑惠网络成瘾量表(CIAS),进行效标效度的验证。在所有样本中抽取200人...目的:检验网络游戏障碍量表(20-item Internet Gaming Disorder Test,IGD-20)在中国大学生人群中的信度和效度。方法:用IGD-20中文版对1120名大学生实测,同时测定陈淑惠网络成瘾量表(CIAS),进行效标效度的验证。在所有样本中抽取200人间隔六周后进行重测。结果:验证性因子分析结果支持六因子结构,各拟合度指标分别为:χ^2/df为4.5,P<0.001,NFI为0.98,CFI为0.98,IFI为0.98,GFI为0.95,AGFI为0.91,RMSEA为0.051。项目分析显示各条目与所属分量表之间的得分均呈显著相关(r值=0.59~0.88,P<0.01)。中文版IGD-20总量表及凸显、情绪调节、耐受、戒断、冲突、复发六个分量表的Cronbach’s α系数分别为0.89、0.84、0.89、0.87、0.91、0.82及0.92。总量表及六个分量表的重测信度为0.81、0.75、0.76、0.83、0.89、0.73、及0.81。IGD-20总分及6个因子得分与CIAS总均分及其5个因子存在显著性相关(r=0.70~0.94,P<0.001)。结论:网络游戏障碍量表中文版具有良好的信效度,可以作为研究网络游戏障碍的工具。展开更多
文摘为探索适宜晋北地区推广应用的藜麦栽培管理模式,实现藜麦产量和品质提升,本试验选用当地自有品种华青1号,采用单因素完全随机设计,以有机肥和无机肥配施比例为变量,设常规施肥CK(有机肥0 kg hm^(-2),尿素和磷酸二胺各450 kg hm^(-2))、有机肥和无机肥配施比例T1(有机肥1500 kg hm^(-2),尿素和磷酸二胺各225 kg hm^(-2))、T2(有机肥2250 kg hm^(-2),尿素和磷酸二胺各225 kg hm^(-2))、T3(有机肥3000 kg hm^(-2),尿素和磷酸二胺各225 kg hm^(-2))4个处理,分析藜麦生育进程、农艺性状的差异,揭示藜麦产量和品质同步提升的农学性状,探求藜麦高产优质适宜的有机无机配施比例。结果表明,生物菌肥与无机肥配施可增加土壤表层有机质含量,降低碱解氮和有效磷含量及土壤pH,显著增加速效钾含量,且随生物菌肥施用量的增加,土壤中有机质、碱解氮、有效磷和速效钾含量提高,pH降低;与常规施肥CK相比,配施生物菌肥能够缩短藜麦生育期,提高成熟期藜麦株高、茎秆直径和茎秆强度,从而降低倒伏率;增加藜麦分枝数、千粒重,提高了产量;可增加蛋白质和脂肪含量,T2处理表现明显;降低淀粉含量,以T2处理最低,但与其他两处理间差异不显著;生物菌肥与无机肥配施可提高植株对肥料的利用,随生物菌肥施用量的增加,氮肥利用效率、磷肥利用效率及氮磷肥偏生产力先升后降,均以T2处理最高。相关分析结果表明,藜麦籽粒产量与千粒重的关系最密切,籽粒蛋白质含量与产量、千粒重、分枝数和茎秆强度也呈正相关,籽粒淀粉含量与千粒重呈负相关。因此,本试验条件下,晋北地区有机无机配施量为氮磷肥各225 kg hm^(-2)配施生物有机菌肥2250 kg hm^(-2)时利于藜麦实现产量品质同步提升。
基金Supported by the Fundamental Research Funds for the Central Universities under Grant No 2012LWB54.
文摘The structural transformation and electronic structure of ZnO under hydrostatic pressure are investigated using the HSE06 range-separated hybrid functional.We show that wurtzite ZnO under pressure undergoes a structural transition to a graphite-like phase.We also find that the band gap of wurtzite phase is always direct,whereas the new phase can display either direct or indirect band structure.Furthermore,the gap is greatly enhanced by pressure and no semi-metallic phase is observed.This is drastically different from our previous results of AlN and GaN[Appl.Phys.Lett.100(2012)022104].
基金Supported by the National Natural Science Foundation of China under Grant Nos 11004242,10947119 and 11047128the Fundamental Research Funds for the Central Universities under Grant Nos 2010LKWL01 and 2010LKWL02+1 种基金the Youth Science Funds of China University of Mining and Technology under Grant Nos 2009A040 and 2009A048the Start-up Funds from China University of Mining and Technology.
文摘Rhombohedral BaTi0_(3)under hydrostatic pressure is investigated by first principles calculations.Our results show that just like tetragonal perovskites,as pressure increases,this material first becomes para-electric at low pressures,then transfers to another ferroelectric phase at much higher pressures.We also find a giant enhancement of piezoelectricity near the phase-transition regions,due to large atomic displacements along different directions in response to the applied pressures.
