Results 91 to 100 of about 580 (154)

砾石覆盖对土壤水热过程及旱作小麦玉米产量的影响

, 2017
为了揭示砾石覆盖对农田土壤水热变化及作物产量形成的影响，2013—2015 年采用小区试验法研究冬小麦-夏玉 米轮作条件下土壤水分变化、温度效应以及作物生长和产量之间的相互作用关系。田间试验设置无覆盖（CK）、25%砾石 覆盖（GM1）、50%砾石覆盖（GM2）、75%砾石覆盖（GM3）和100%砾石覆盖（GM4）5 个处理。结果表明：砾石覆盖 度与土壤水分呈显著正相关，100%砾石覆盖处理土壤贮水量最高；干旱胁迫条件下砾石覆盖度越高土壤的保水性越好 ...
冯 浩, 李 毅, 王冬林
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Effect of nitrogen on vertical distribution of canopy nitrogen and chlorophyll relative value (SPAD value) of summer maize in sub-humid areas

, 2009
以半湿润地区土垫旱耕人为土为供试土壤,采用田间试验,研究了不同施氮水平下夏玉米(Zeamays L.)拔节期、灌浆期和成熟期3个生育期冠层叶片氮素、叶绿素相对值(SPAD值)的垂直分布规律及其差异;同时对各层叶片含氮量、SPAD值与施氮量进行相关分析。结果表明,在各生育期不同叶层叶片含氮量按上、中、下层顺序呈明显递减规律,从全生育期不同施氮处理看,上层比中层增加6.64%,中层比下层增加5.18%。随施氮量增加,中上层叶片含氮量差异增大,中下层叶片含氮量差异减小 ...
党蕊娟, 李世清, 李生秀, 穆晓慧   +3 more
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[Pollen allergen sensitization feature of seasonal allergic rhinitis in children and adolescents in northern China]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi, 2020
Wang X, Guo M, Wang H, Wang X.
europepmc   +1 more source

[Epidemiological survey of allergic rhinitis in steppe area of Xilingol League, Inner Mongolian of China]. [PDF]

Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi, 2021
Zhuang Y, Ma T, Kang Z, Siqin B, Yan W, Bai Y, Shan G, Wang X.   +7 more
europepmc   +1 more source

Effect of fertigation depth on dry matter partition and water use efficiency of corn

, 2003
用土柱管栽试验方法研究了不同灌溉施肥深度对夏玉米生长发育、地上地下部分同化物分配、产量和水分利用效率的影响。试验结果表明:土表下灌施抑制了玉米生育早期的地上部分生长,使根系向土壤中下层的分布加强,从而保证了作物中后期对水分养分的吸收利用,提高了水分利用效率。在本试验条件下 ...
何华, 康绍忠, 曹红霞
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[Guidelines on the management of ascites in cirrhosis (2023 version)]. [PDF]

Zhonghua Gan Zang Bing Za Zhi, 2023
Chinese Society of Hepatology, Chinese Medical Association.   +1 more
europepmc   +1 more source

A Study on WUE and Pn Diurnal Change Features and Its Mechanism in Crops Under Different Water Conditions

, 1999
通过对供水和干旱下春小麦（ＴｒｉｔｉｃｕｍａｅｓｔｉｖｕｍＬ．）和夏玉米（ＺｅａｍａｙｓＬ．）生理生态适应研究表明：作物水分利用效率（ＷＵＥ）、光合速率（Ｐｎ）日变化受干旱缺水影响明显，干湿处理间其差别最明显时段为下午（１２：００～１６：００）；缺水时作物Ｐｎ在午前段以气孔限制为主，午后段则以非气孔限制为主；缺水对ＷＵＥ日变化影响作用与叶水势，以及大气环境因素 ...
山仑, 黄占斌
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[Chinese expert consensus on the diagnosis and management of nodal peripheral T-cell lymphoma (2025)]. [PDF]

Zhonghua Xue Ye Xue Za Zhi
Lymphoma Expert Committee of Chinese Society of Clinical Oncology (CSCO), Lymphoid Disease Group, Chinese Society of Hematology, Chinese Medical Association.   +3 more
europepmc   +1 more source

[Chinese expert consensus on the diagnosis and treatment of plasma cell leukemia (2025)]. [PDF]

Zhonghua Xue Ye Xue Za Zhi
Multiple Myeloma Expert Committee of Chinese Society of Clinical Oncology (CSCO), Myeloma & Plasma Cell Disease Group, Hematology Oncology Committee of China Anti-Cancer Association (CACA), Plasma Cell Disease Group, Chinese Society of Hematology, Chinese Medical Association.   +5 more
europepmc   +1 more source

[The guidelines for diagnosis and treatment of myeloma bone disease in China (2022)]. [PDF]

Zhonghua Xue Ye Xue Za Zhi, 2022
Hematological Oncology Committee of China Anti-Cancer Association, Chinese Society of Hematology, Chinese Medical Association.   +2 more
europepmc   +1 more source