Slope aspect affects the non-structural carbohydrates and C:N:P stoichiometry of Artemisia sacrorum on the Loess Plateau in China
Slope aspect affects the non-structural carbohydrates and C:N:P stoichiometry of Artemisia sacrorum on the Loess Plateau in China
复制标题
坡向对黄土高原蒿非结构碳水化合物和C:N:P化学计量的影响
DOI：
10.1016/j.catena.2016.12.024
复制
发表时间：
2017-05-01
期刊：
影响因子：
6.2
通讯作者：
Xue, Sha
中科院分区：
文献类型：
--
作者：
Ai, Zemin;He, Lirong;Xue, Sha
坡度作为中国黄土高原的一个重要地形因子，可能影响该地区沙蒿的生产力及其相关特征。选择阳坡、半阳坡和阴坡3种不同的坡度，研究了不同坡度对紫茎泽兰生物量、碳：氮：磷（C：N：P）化学计量比和非结构性碳水化合物（NSC）含量的影响。2014年的骶骨。最大A。在半阳坡上检测到骶骨生物量，且地下生物量与地上生物量的比值在不同的坡度上有显著的变化。坡度对地上部N：P比值和地下部C：P和N：P比值有显著影响。根际和非根际土壤的C：P和N：P比值均在阳坡达到最大值，而C：N比值变化不显著。NSC浓度最大值出现在不同的A.骶骨组织，即阳坡地上部分和半阳坡地下部分。地上部可溶性糖与淀粉的比值在3个坡向间差异显著，而地下部差异不显著。坡度是影响黄土高原植物养分和化学计量的主要环境因子。(C)2017爱思唯尔B.V.保留所有权利。
Slope aspect, as an important topographic factor on the Loess Plateau in China, may influence the productivity and relative characteristics of Artemisia sacrorum in this area. Three slope aspects (sunny, half-sunny, and shady slopes) were chosen to study the effects of slope aspect on the biomass, carbon:nitrogen:phosphorus (C:N:P) stoichiometry, and non-structural carbohydrate (NSC) concentrations in A. sacrorum in 2014. The maximum A. sacrorum biomass was detected in the half-sunny slope, and the ratio of belowground to aboveground biomass significantly changed in the different slope aspects. Slope aspect significantly affected the N:P ratio in the aboveground and the C:P and N:P ratios in the belowground. The maximum C:P and N:P ratios in the rhizosphere and non-rhizosphere soils were reached in the sunny slope, whereas no significant change was observed in C:N ratio. The maximum NSC concentrations occurred in different A. sacrorum tissues, that is, aboveground in the sunny slope and belowground in the half-sunny slope. The ratio of soluble sugar to starch concentrations in the aboveground significantly differed among the three slope aspects, but that in the belowground showed no significant difference. Slope aspect was the main environmental factor affecting the plant nutrient and stoichiometry on the Loess Plateau in China. (C) 2017 Elsevier B.V. All rights reserved.