Results 71 to 80 of about 675 (112)
Shuitu Baochi Xuebao, 2019 在自然降水条件下，定量研究黔西北喀斯特石漠化区典型乡土植物刺梨在坡耕地产流产沙的变化规律，分析该植物篱控制侵蚀产沙的水动力学机理。结果表明，刺梨植物篱截流、分流作用延缓径流产生及汇流时间，增加喀斯特坡面径流入渗量，减小坡面侵蚀动力。在不同降雨强度条件下，喀斯特坡面入渗率与径流量和产沙量呈负线性相关。植物根系缠绕串连黏结根土，改变土壤的入渗特性，增强土壤抗冲性与抗蚀能力。根系密度随土层深度增加而减少，减沙效应亦变小 ...
王恒松, 张芳美
doaj
Neonatal end of life care in a tertiary care centre in Canada: a brief report. [PDF]
Zhongguo Dang Dai Er Ke Za Zhi, 2016 Sankaran K, Hedin E, Hodgson-Viden H.
europepmc +1 more source
Shuitu Baochi Xuebao, 2017 为阐明喀斯特小流域土壤有机碳密度分布特征及有机碳储量空间分布格局，采用野外布点采样、实验室测定和地统计学分析相结合的方法，利用2 755个详细调查的剖面样地和23 536个土壤样品，定量研究了喀斯特小流域土壤有机碳密度、碳储量的空间异质性及分布特征。结果表明：后寨河小流域表层（0—20 cm）土壤有机碳含量和密度的平均值为分别为25.07 g/kg和5.23 kg/m2，剖面土壤（0—100 cm）土壤有机碳含量和有机碳密度分别为20.71 g/kg和10.21 kg/m2 ...
张珍明, 周运超, 黄先飞, 田
doaj
An ethnobotanical study on medicinal food plants used by the Kazakh people in Altay, Xinjiang, China. [PDF]
J Ethnobiol EthnomedZhao YQ +7 more
europepmc +1 more source
[Association of public health and social measures with the effectiveness of COVID-19 epidemic control]. [PDF]
Zhong Nan Da Xue Xue Bao Yi Xue BanZong H +5 more
europepmc +1 more source
An annotated checklist of mammals of Kenya. [PDF]
Zool Res, 2019 Musila S +9 more
europepmc +1 more source
[Physiological Characteristics of the Facial Skin in Ethnic Tibetan Population Living at High Altitudes]. [PDF]
Sichuan Da Xue Xue Bao Yi Xue BanFang L +7 more
europepmc +1 more source