To study the effects of local nitrogen supply on water and nutrient absorption, French bean （Phaseolus vulgaris L.） plants were grown in a split root system. Five treatments supplied with different nitrogen forms we...To study the effects of local nitrogen supply on water and nutrient absorption, French bean （Phaseolus vulgaris L.） plants were grown in a split root system. Five treatments supplied with different nitrogen forms were compared： homogeneous nitrate （NN） and homogenous ammonium （AA） supply, spatially separated supply of nitrate and ammonium （NA）, half of the root system supplied with N-free nutrient solution, the other half with either nitrate （NO） or ammonium （AO）. The results showed that 10 d after onset of treatments, root dry matter （DM） in the nitratesupplied vessels treated with NA was more than two times higher than that in the ammonium-supplied vessels. Water uptake from the nitrate-supplied vessels treated with NA was 281% higher than under ammonium supply. In treatments NO and AO, the local supply of N resulted in clearly higher root DM, and water uptake from the nitratesupplied vessels was 82% higher than in the -N vessels. However, in AO plants, water uptake from the -N nutrient solution was 129% higher than from the ammonium-supplied vessels. This indicates a compensatory effect, which resulted in almost identical rates of total water uptake of treatments AA and AO, which had comparable shoot DM and leaf area. Ammonium supply reduced potassium and magnesium absorption. Water uptake was positively correlated with N, Mg and K uptake.展开更多
Let be an injective function. For a vertex labeling f, the induced edge labeling is defined by, or;then, the edge labels are distinct and are from . Then f is called a root square mean labeling of G. In this paper, we...Let be an injective function. For a vertex labeling f, the induced edge labeling is defined by, or;then, the edge labels are distinct and are from . Then f is called a root square mean labeling of G. In this paper, we prove root square mean labeling of some degree splitting graphs.展开更多
Split-root solution culture was used to study the promoting effect of lanthanum on rice (Oryza sativa) growth and its physiological mechanisms. Results sho w that low concentration (0.05～1.5 mg·L -1) increases...Split-root solution culture was used to study the promoting effect of lanthanum on rice (Oryza sativa) growth and its physiological mechanisms. Results sho w that low concentration (0.05～1.5 mg·L -1) increases rice yield an d grain numbers. High concentration depresses grain formation (9～30 mg·L -1 ) and root elongation (1.5～30 mg·L -1). No significant influence on str aw dry weight was found over the whole concentration range except the 0.05 mg·L -1 treatment. With the increase of La concentration from 0.05 to 0.75 mg· L -1, catalase (CAT) activity in the first fully expandeing leaves and root s decreases. When La concentration is greater than 0.75 mg·L -1 or less than 9 mg·L -1, it significantly decreases superoxide dismutase activity ( SOD) in the leaves and roots. No significant effects were found on chlorophyll, protein and malondialdehyde (MDA) content. Possible mechanisms of La′s promotin g effect on rice growth and reduction effect of ·O- 2 were discussed.展开更多
The aim of this article is to study the structures of arbitrary split δ-Jordan Lie triple systems, which are a generalization of split Lie triple systems. By developing techniques of connections of roots for this kin...The aim of this article is to study the structures of arbitrary split δ-Jordan Lie triple systems, which are a generalization of split Lie triple systems. By developing techniques of connections of roots for this kind of triple systems, we show that any of such δ-Jordan Lie triple systems T with a symmetric root system is of the form T=U+∑[α]∈■1/~I[α] with U a subspace of T0 and any I[α] a well described ideal of T, satisfying{I[α],T,I[β]}={I[α],I[β],T}={T,I[α],I[β]}=0 if [α]≠[β] .展开更多
[目的]在三维模型确定与镜下观测一致的骨性标志点,测量辅助单孔分体内镜准确定位并安全减压L_(4)出口神经根的参数。[方法]构建34例L_(4/5)单侧极外侧腰椎间盘突出症患者腰椎CT三维模型,以横突根部下缘与峡部外侧缘的交点(intersection...[目的]在三维模型确定与镜下观测一致的骨性标志点,测量辅助单孔分体内镜准确定位并安全减压L_(4)出口神经根的参数。[方法]构建34例L_(4/5)单侧极外侧腰椎间盘突出症患者腰椎CT三维模型,以横突根部下缘与峡部外侧缘的交点(intersection of the lower margin of the transverse process root with the lateral margin of the isthmus,ITPI)为骨性标志点,分别在ITPI所在的矢状面测量相关指标,并进行男女间、健侧与患侧的比较。[结果]L_(4)出口神经根下缘投影于L_(4/5)椎间隙之上,健侧占比(4/34,11.8%)小于患侧占比(18/34,52.9%),投影于L_(4/5)椎间隙之内,健侧占比(30/34,88.2%)大于患侧占比(12/34,35.3%)。分别测量ITPI至L_(4)出口神经根上缘的垂直距离、L_(4)出口神经根下缘的垂直距离、L_(4)出口神经根后缘的前后水平距离、L_(4)下终板的垂直距离、L_(5)上终板的垂直距离、L_(4)椎弓根下缘的垂直距离;ITPI分别至L_(4)下终板最外侧缘的左右水平距离以及其所在矢状面上L_(4)出口神经根上缘的垂直距离、L_(4)出口神经根下缘的垂直距离、L_(4)下终板的垂直距离、L_(5)上终板的垂直距离;ITPI分别至L_(4)椎弓根内侧壁的左右水平距离、硬脊膜外侧缘的左右水平距离,以上指标男女间、健患侧之间差异均无统计学意义(P>0.05)。各测量指标与年龄、BMI均无显著相关性(P>0.05)。[结论]以L_(4)横突根部下缘与峡部外侧缘交点作为骨性标志点,无需向上探查,只需向外、向下磨除部分骨质即可显露并安全减压L_(4)出口神经根。展开更多
基金Supported by the Deutsche Forschungsgemeinschaft （Sa359/9） and the National Natural Science Foundation of China （30400279）.Acknowledgements We thank Barbel Biegler and Anne ThieBen （Institute of Plant Nutrition and Soil Science, Kiel University, Germany） for skilled technical help.
文摘To study the effects of local nitrogen supply on water and nutrient absorption, French bean （Phaseolus vulgaris L.） plants were grown in a split root system. Five treatments supplied with different nitrogen forms were compared： homogeneous nitrate （NN） and homogenous ammonium （AA） supply, spatially separated supply of nitrate and ammonium （NA）, half of the root system supplied with N-free nutrient solution, the other half with either nitrate （NO） or ammonium （AO）. The results showed that 10 d after onset of treatments, root dry matter （DM） in the nitratesupplied vessels treated with NA was more than two times higher than that in the ammonium-supplied vessels. Water uptake from the nitrate-supplied vessels treated with NA was 281% higher than under ammonium supply. In treatments NO and AO, the local supply of N resulted in clearly higher root DM, and water uptake from the nitratesupplied vessels was 82% higher than in the -N vessels. However, in AO plants, water uptake from the -N nutrient solution was 129% higher than from the ammonium-supplied vessels. This indicates a compensatory effect, which resulted in almost identical rates of total water uptake of treatments AA and AO, which had comparable shoot DM and leaf area. Ammonium supply reduced potassium and magnesium absorption. Water uptake was positively correlated with N, Mg and K uptake.
文摘Let be an injective function. For a vertex labeling f, the induced edge labeling is defined by, or;then, the edge labels are distinct and are from . Then f is called a root square mean labeling of G. In this paper, we prove root square mean labeling of some degree splitting graphs.
文摘Split-root solution culture was used to study the promoting effect of lanthanum on rice (Oryza sativa) growth and its physiological mechanisms. Results sho w that low concentration (0.05～1.5 mg·L -1) increases rice yield an d grain numbers. High concentration depresses grain formation (9～30 mg·L -1 ) and root elongation (1.5～30 mg·L -1). No significant influence on str aw dry weight was found over the whole concentration range except the 0.05 mg·L -1 treatment. With the increase of La concentration from 0.05 to 0.75 mg· L -1, catalase (CAT) activity in the first fully expandeing leaves and root s decreases. When La concentration is greater than 0.75 mg·L -1 or less than 9 mg·L -1, it significantly decreases superoxide dismutase activity ( SOD) in the leaves and roots. No significant effects were found on chlorophyll, protein and malondialdehyde (MDA) content. Possible mechanisms of La′s promotin g effect on rice growth and reduction effect of ·O- 2 were discussed.
基金Supported by the National Natural Science Foundation of China(Grant No.11801121)the Natural Science Foundation of Heilongjiang Province(Grant No.QC2018006)the Fundamental Research Fundation for Universities of Heilongjiang Province(Grant No.LGYC2018JC002).
文摘The aim of this article is to study the structures of arbitrary split δ-Jordan Lie triple systems, which are a generalization of split Lie triple systems. By developing techniques of connections of roots for this kind of triple systems, we show that any of such δ-Jordan Lie triple systems T with a symmetric root system is of the form T=U+∑[α]∈■1/~I[α] with U a subspace of T0 and any I[α] a well described ideal of T, satisfying{I[α],T,I[β]}={I[α],I[β],T}={T,I[α],I[β]}=0 if [α]≠[β] .
文摘[目的]在三维模型确定与镜下观测一致的骨性标志点,测量辅助单孔分体内镜准确定位并安全减压L_(4)出口神经根的参数。[方法]构建34例L_(4/5)单侧极外侧腰椎间盘突出症患者腰椎CT三维模型,以横突根部下缘与峡部外侧缘的交点(intersection of the lower margin of the transverse process root with the lateral margin of the isthmus,ITPI)为骨性标志点,分别在ITPI所在的矢状面测量相关指标,并进行男女间、健侧与患侧的比较。[结果]L_(4)出口神经根下缘投影于L_(4/5)椎间隙之上,健侧占比(4/34,11.8%)小于患侧占比(18/34,52.9%),投影于L_(4/5)椎间隙之内,健侧占比(30/34,88.2%)大于患侧占比(12/34,35.3%)。分别测量ITPI至L_(4)出口神经根上缘的垂直距离、L_(4)出口神经根下缘的垂直距离、L_(4)出口神经根后缘的前后水平距离、L_(4)下终板的垂直距离、L_(5)上终板的垂直距离、L_(4)椎弓根下缘的垂直距离;ITPI分别至L_(4)下终板最外侧缘的左右水平距离以及其所在矢状面上L_(4)出口神经根上缘的垂直距离、L_(4)出口神经根下缘的垂直距离、L_(4)下终板的垂直距离、L_(5)上终板的垂直距离;ITPI分别至L_(4)椎弓根内侧壁的左右水平距离、硬脊膜外侧缘的左右水平距离,以上指标男女间、健患侧之间差异均无统计学意义(P>0.05)。各测量指标与年龄、BMI均无显著相关性(P>0.05)。[结论]以L_(4)横突根部下缘与峡部外侧缘交点作为骨性标志点,无需向上探查,只需向外、向下磨除部分骨质即可显露并安全减压L_(4)出口神经根。
