Results 61 to 70 of about 16,571 (112)

气候条件对黄土高原水土保持植被结构的影响及其在植被建设中的意义

Shuitu Baochi Xuebao, 2004
以黄河流域的资料为基础,运用数理统计的方法将描述水土保持植被结构的指标与气候指标相联系,揭示了气候条件对黄土高原水土保持植被结构的影响,在此基础上提出对乔木面积与乔灌草总面积的比率是否合理进行评价的方法。研究表明,年降水量是影响水土保持植被结构的最重要气候因素,乔木、灌木和草地与乔灌草总面积的比率与年降水量的相关系数的显著性水平均大大优于0.01。乔木、灌木和草地与乔灌草总面积的比率与年降水量的相关系数分别为0.72,-0.48,-0.47,逐渐减小,说明乔木、灌木和草类对降水的依赖程度逐渐减小 ...
许炯心
doaj  

砒砂岩区主要造林树种枯落物及林下土壤持水特性

Shuitu Baochi Xuebao, 2017
为了探究砒砂岩区不同造林树种水文特征，以该地区油松、侧柏、青杨、山杏、沙棘、柠条为研究对象，通过浸泡法和环刀法，对比分析了不同树种枯落物层和土壤层的持水特性。结果表明：砒砂岩区主要造林树种枯落物蓄积量变动范围为1.55~7.89 t/hm2，青杨林下枯落物最大持水率最高为281.26%，其他树种枯落物最大持水率依次为油松（217.14%）、侧柏（201.05%）、山杏（202.79%）、沙棘（170.96%）、柠条（158.08%）撂荒地（143.88%）。油松林下土壤层容重最小为1.46 g/cm3 ...
杨振奇, 秦富仓, 李晓琴, 刘力川, 牛晓乐   +4 more
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[Analysis of current status and trends of disease burden of neck pain in China from 1990 to 2023]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Lu Z, Li J, Hu J, Zhao Y.
europepmc   +1 more source

[Current status and Joinpoint regression analysis of the burden of musculoskeletal diseases in China from 1990 to 2023]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Hu Y, Hu L, Liu Q, Xiong Q, Li J, Yang C, Fu W.   +6 more
europepmc   +1 more source

[Trends in burden of osteoporosis in China from 1990 to 2023 and analysis of epidemiological factors]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Wu Y, Lai Z, Yan H, Zhou B, Chen W, Zeng Z.   +5 more
europepmc   +1 more source

[A study of burden of gout disease in adults attributable to high body mass index and impaired kidney function in China from 1990 to 2023]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Liu Q, Hu L, Hu Y, Xiong Q, Li J, Yang C, Fu W.   +6 more
europepmc   +1 more source

[Research on tissue regeneration and engineered scaffold materials in prevention and treatment of lymphedema]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Yuan S, Deng C.
europepmc   +1 more source

[Disease burden trends of site-specific osteoarthritis in China from 1990 to 2023 and the attribution to high body mass index]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Xiong Q, Hu L, Hu Y, Liu Q, Li J, Yang C, Fu W.   +6 more
europepmc   +1 more source

[Clinical analysis of blood ammonia levels for predicting survival following transjugular intrahepatic portosystemic shunt in patients with cirrhosis]. [PDF]

Zhonghua Gan Zang Bing Za Zhi
Liu Y, Zhang F, Yin Q, Xiao JQ, Zhang M, Zhang W, Wang L, Zhuge YZ.   +7 more
europepmc   +1 more source

[Medical treatment standards for emergency burn wounded (2025 edition)]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
National Health Commission Of The People's Republic Of China.
europepmc   +1 more source