Results 91 to 100 of about 470 (144)

黄浦江中游5种典型林分枯落物和土壤水源涵养能力研究

Shuitu Baochi Xuebao, 2019
为了解黄浦江流域中游典型人工纯林枯落物和土壤的水源涵养能力，提高流域内水源涵养林建设保护与经营管理水平，选择黄浦江中游东岸的浦江郊野公园内的5种典型人工纯林（香樟林、桂花林、栾树林、无患子林和池杉林）作为研究对象，采用环刀法、烘干法与室内浸泡法对林分地表枯落物和土壤的水源涵养能力进行研究，并结合枯落物有效拦蓄量和土壤有效蓄水量来定量比较5种林分枯落物层和土壤层的水源涵养能力。结果表明：（1）5种林分枯落物有效拦蓄量为7.74~27.90 t/hm2，表现为池杉林 > 无患子林 > 桂花林 > 栾树林 >
李阳, 万福绪
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晋西黄土区典型林分枯落物层水文生态特性研究

Shuitu Baochi Xuebao, 2020
选择山杨栎类次生林（以下简称次生林）、刺槐林、侧柏林、油松林为研究对象，通过样地调查，结合室内浸泡方法，对比分析枯落物（未分解层、半分解层）的水文特征指标，研究典型林分枯落物层水文生态特性。结果表明：（1）枯落物厚度为3.93~4.95 cm，刺槐林最大，油松林最小；蓄积量为次生林最大（19.28 t/hm2），侧柏林（18.03 t/hm2）和刺槐林（17.57 t/hm2）次之，油松林最小（14.73 t/hm2），未分解层蓄积量小于半分解层。（2）枯落物最大持水量（率）为30.92~61.31 t/
马晓至, 毕华兴, 王珊珊, 崔艳红, 赵丹阳, 云慧雅, 侯贵荣   +6 more
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[Effects of collagen type ⅩⅦ α1 on epidermal stem cells in aging skin and the microRNA intervention mechanism]. [PDF]

Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi, 2022
Sun JC, Sun TJ, Shen ZA, Zhao HQ, Liu XZ, Zhang YJ.   +5 more
europepmc   +1 more source

Soil Preferential Flow Characteristics in Coal Mine Subsidence Area under Different Rainfall Duration [PDF]

[Objective] Research on the preferential flow characteristics triggered by cracks in coal mining subsidence areas can provide support for scientific and rational development of water resource management and ecological management practice in the mining ...
DAI Bin, GUO Qiaoling, HU Qian, PENG Zikang, YUAN Yizhe   +4 more
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[Clinical characteristics and analysis of risk factors for heart injuries in 55 patients with lightning injury on plateau in Tibet Autonomous Region]. [PDF]

Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi, 2023
Yang SS, Zhao YY, Luo ZJ, He C, Li YH.
europepmc   +1 more source

ENERGY FOR MIXED FOREST OF CUNNINGHAMIA LANCEOLATA AND TSOONGIODENDRON ODORUM [PDF]

, 2001
对杉木观光木混交林群落能量的研究结果表明 :混交林中观光木地上部分灰分含量以皮最高 ,而杉木则以叶最高 ,两者GCV(干重热值 )和AFCV(去灰分热值 )均以叶为最高 ;观光木、杉木地下各部分的灰分含量均随径级的减小而增加 ,GCV均以粗根最高 ,细根最低 ;观光木的平均灰分含量高于杉木 ,但GCV和AFCV均低于杉木 ;从乔木层、灌木层到草本层 ,灰分含量依次增加 ,GCV和AFCV则依次降低 .混交林群落的能量现存量、年净增量、归还量和净固定量分别是纯林的 1.2 6倍、1.15倍、1.0 2倍和
杨玉盛, 林瑞余, 蔡丽平, 陈光水, 陈银秀   +4 more
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Screening, Expression and Analysis of Enzymatic Properties of a Cold-active Lipase-producing Strain [PDF]

High-yield strains of cold-active lipase are screened to provide production information for the industrial development of lipase. A cold-active lipase-producing strain was isolated from Xing'an larch forest soil in Mohe County using the Rhodamine B plate
Chenchen QI, Chengtao WANG, Huijing ZHANG, Huiqian LIU, Jiaxing LI, Linlin XU, Mengyao ZHANG   +6 more
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[National expert consensus on clinical diagnosis and treatment of hot crush injury wound (2023 version)]. [PDF]

Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi, 2023
Burns and Trauma Branch of Chinese Geriatrics Society, Branch of Burn and Trauma Wound Repair Materials of Chinese Society of Biomaterials, Wound Repair Professional Committee of Chinese Medical Doctor Association.   +2 more
europepmc   +1 more source

西南亚热带典型林分枯落物层对酸沉降的响应

Shuitu Baochi Xuebao, 2011
通过模拟酸雨实验,研究了缙云山马尾松×四川大头茶×四川杨桐混交林(林分Ⅰ)、广东山胡椒×四川山矾混交林(林分Ⅱ)、毛竹林(林分Ⅲ)、四川山矾×杉木混交林(林分Ⅳ)、马尾松林(林分Ⅴ)、灌丛(林分Ⅵ)枯落物淋滤液的化学性质。结果表明:①6种典型林分的枯落物淋滤液pH值均随模拟酸雨pH的降低而减小;林分Ⅴ的枯落物层对模拟酸雨pH值的缓冲效果最好。②6种典型林分枯落物淋滤液中的盐基离子(Ca2+、Mg2+、K+、Na+、NH+4)浓度随模拟酸雨pH值的降低而增加。在pH值2.7和3.5的强酸雨作用下 ...
刘楠, 王玉杰, 赵占军, 赵洋毅, 冯华敏, 易琴, 雷声坤   +6 more
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[Curcumin alleviates the manganese-induced neurotoxicity by promoting autophagy in rat models of manganism]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban, 2022
Lai LY, Dou CS, Zhi CN, Chen J, Ma X, Zhao P, Yao BY.   +6 more
europepmc   +1 more source