为分析宁南黄土丘陵区林分结构的水文功能影响关系及差异,以彭阳县3种典型林分(山杏纯林、山杏柠条混交林、山杏沙棘混交林)为对象,在2017年生长季观测了林下草本生物量和生物多样性、冠层降雨再分配、林下蒸散、土壤湿度的变化特征。结果表明:(1)林分地表覆盖度大小顺序为山杏沙棘混交林(0.81) > 山杏柠条混交林(0.71) > 山杏纯林(0.67);草本植物地上生物量为山杏沙棘混交林(0.86) > 山杏纯林(0.62) > 山杏柠条混交林(0.41);草本植物生物多样性为山杏柠条混交林>山杏沙棘混交林 ...
韩新生 +4 more
doaj
为探究滇中高原优势群落常绿阔叶林植被对降雨雨滴动能的影响,于2016年和2017年5—9月,在天然降雨条件下运用自计雨量计和滤纸色斑法,通过定位监测磨盘山常绿阔叶林林外降雨和林内穿透雨特征及其雨滴特性,针对不同降雨条件研究了常绿阔叶林对雨滴动能等特征的影响。结果表明:林外的雨滴个数比林内降雨的雨滴个数多61.7%;随着雨量的增大,雨滴直径分布规律也呈逐渐增大的趋势;在小雨条件下,
曹光秀, 赵洋毅, 段旭, 薛杨
doaj
人工模拟降雨条件下,在大田设置地膜覆盖(PM)、4种秸秆覆盖量(覆盖量分别为1 500,4 500,7 500,10 500kg/hm2,即SM15、SM45、SM75和SM105),同时设置无覆盖处理作为对照(CK),研究不同覆盖方式对雨后冬小麦棵间蒸发量、土壤剖面水分和降雨土壤蓄积量的影响。结果表明:各处理雨后冬小麦逐日棵间土壤蒸发累积量和日变化有相同变化趋势;同一时间段内不同覆盖处理的土壤蒸发差异明显,各生育阶段土壤累积蒸发量和日蒸发量均表现为SM105SM75>SM45>SM15>CK>PM ...
刘战东, 高阳, 巩文军, 段爱旺
doaj
[Clinical characteristics and gender differences in Wagner grade 4-5 diabetic foot patients with variable severity of lower extremity atherosclerotic occlusive disease]. [PDF]
Gong X, Yuan T, Chen Z, Peng Y, Huang Y.
europepmc +1 more source
[Strategic orthodontic treatment for multiple mesioangular impacted molars: a case report]. [PDF]
Zhan J +5 more
europepmc +1 more source
[Biomechanical study on the combined effects of femoral component rotational malalignment and osteoporosis in unicompartmental knee arthroplasty]. [PDF]
Zhou T +5 more
europepmc +1 more source
[Determination of 30 homologues of phosphatidylcholines and lysophosphatidylcholines in human serum by liquid chromatography-tandem mass spectrometry and their correlation analysis with coronary artery disease]. [PDF]
Li WY +6 more
europepmc +1 more source
[Clinical application research of three-dimensional printed patient-specific cutting guides in Cole midfoot osteotomy]. [PDF]
Zhang Z +7 more
europepmc +1 more source
[Risk factor analysis of excessive resection of facet joint after large-channel spinal endoscopic depression for degenerative lumbar diseases]. [PDF]
Yan T, Zeng J, Lin X, Li T, Wu C.
europepmc +1 more source
[Finite element analysis of tibial and femoral resection configurations on varus alignment in total knee arthroplasty]. [PDF]
Liang C +8 more
europepmc +1 more source

