Subjects: Management Science >> Science ology and Management submitted time 2018-01-11 Cooperative journals: 《智库理论与实践》
Abstract：[目的/意义]“一带一路”倡议旨在为全球经济打通“任督二脉”，促进全球经济共同、包容、强劲、可持续发展。中国提出的这一宏大国际合作计划所面临的风险和挑战是空前的。除了要防范沿线各国的政治和社会风险之外，还必须有效应对气候变化、自然灾害、传染病、环境污染、生态退化、水与能源资源短缺等各种挑战。如何有效应对这些挑战，对于“一带一路”建设的成败至关重要。[方法/过程]本文分析了“中巴经济走廊”建设所面临的挑战及科技创新在其中所起的作用。 [结果/结论]科技创新在“一带一路”建设中扮演十分关键的角色，发挥不可或缺的引领、支撑和保障作用。
Subjects: Biology >> Ecology submitted time 2017-02-09 Cooperative journals: 《生态学报》
Abstract：以藏嵩草沼泽化草甸为研究对象，利用磷脂脂肪酸（PLFA）技术，研究连续6年N素添加对地上植被群落数量特征、土壤微生物群落结构的影响。结果表明：①藏嵩草沼泽化草甸群落生物量、枯枝落叶对施肥处理无明显响应，且莎草科植物对土壤氮素的吸收和利用率较低。②施肥增加了0-10 cm土壤微生物类群PLFAs丰富度，尤其细菌和革兰氏阳性菌PLFAs，降低了10-20 cm PLFAs丰富度；③磷脂脂肪酸饱和脂肪酸/单烯不饱和脂肪酸、细菌PLFAs/真菌PLFAs的比值随土壤层次增加而增加；④ 0-10 cm土层，革兰氏阳性菌、真菌PLFAs含量与pH、土壤速效磷、速效氮、土壤有机质显著正相关（P< 0.05或P< 0.01）；10-20 cm土层，细菌、革兰氏阳性菌、真菌和总PLFAs含量与土壤有机质含量显著正相关（P< 0.05或P < 0.01）。表明藏嵩草沼泽化草甸微生物PLFAs含量和丰富度对施肥的响应存在明显的土层梯度效应，土壤微生物PLFAs含量和丰富度主要受表层土壤初始养分含量的影响。
Subjects: Biology >> Botany >> Plant ecology, plant geography submitted time 2016-05-03
Abstract： Aims Our objective was to explore vegetation carbon storage and its variations in broad-leaved forest ecosystems in alpine area of Qinghai-Xizang Plateau (including Qinghai Province and Xizang Autonomous Region). Methods Based on forest resources inventory data and field investigation data, this paper studied the carbon storage and its sequestration rate, potential in broad-leaved forest ecosystems in alpine area of Qinghai-Xizang Plateau. Important findings The vegetation carbon storage in broad-leaved forest accounted for 310.70 Tg in 2011, with the highest value in broadleaved mixed forest and the lowest value in Populus spp. forest in six broad-leaved forests (including Quercus spp. forest, Betula spp. forest, Populus spp. forest, other hard broad-leaved species forest, other soft broad-leaved species forest and broadleaved mixed forest). The vegetation carbon density of broad-leaved forest was 89.04 Mg?hm–2, with the highest value in other hard broad-leaved species forest and the lowest value in other soft broad-leaved species forest. The carbon storage and carbon density in different layers followed the sequence of tree layer > shrub layer > litter layer > grass layer > dead tree layer and increased with forest age overall. In addition, the vegetation carbon storage of broad-leaved forest increased from 304.26 Tg in 2001 to 310.70 Tg in 2011. The mean annual carbon sequestration and its rate were respectively 0.64 Tg?a–1 and 0.19 Mg?hm–2?a–1. The maximum and minimum of the vegetation carbon sequestration rate were respectively distributed in other soft broad-leaved species forest and other hard broad–leaved species forest, with the highest value in mature forest and the lowest value in young forest. Moreover, the carbon sequestration potential in the tree layer of broad-leaved forest reached 19.09 Mg?hm–2 in 2011, with highest value in Quercus spp. forest and the lowest value in Betula spp. forest. The carbon storage increased gradually during three forest resources inventory periods, indicating that the broad-leaved forest was fully protected to keep natural healthy growth by the forest protection project of Qinghai Province and Xizang Autonomous Region.
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