Results 111 to 120 of about 352 (145)

Field Water Condition and Its Effect on Crop Yield in the South of Loess Plateau

, 1995
黄土高原南部土层深厚疏松，质地中壤，土壤水分性质优良，作物具有良好的水分生态环境。对农田水分条件及其产量效应进行了定量评价，结果表明：东部旱塬农田水分亏缺率和减产率为３０％左右，西部旱塬为１０％左右。同时还对旱作水分产量潜势进行了估算，结果表明：在目前生产力条件下冬小麦旱作水分产量潜势为５３３０～６３００ｋｇ／ｈｍ￣２，春玉米为７７００～９０００ｋｇ／ｈｍ￣２。此外，水肥产量效应的研究指出，目前水分亏缺发生频率为５０％左右，养分为１００％；养分对提高作物产量具有普遍性，不论何种水文年型 ...
李开元
core  

[Next-generation sequencing-based minimal residual disease detection reveals clonal evolution in pediatric acute B-lymphoblastic leukemia: a case report and literature review]. [PDF]

Zhonghua Xue Ye Xue Za Zhi
Chang J, Jia YJ, Wang HX, Qi BQ, Cai XJ, Sun Q, Zhu XF, Xiao ZJ, Wang HJ.   +8 more
europepmc   +1 more source

[Clinical analysis of 11 cases of high-grade B-cell lymphoma in children]. [PDF]

Zhonghua Xue Ye Xue Za Zhi, 2023
Liu J, Wang J, Zhu J, Zhang Y, Lu SY, Sun FF, Huang JT, Wu YP, Cai FY, Cai RQ, Zhen ZZ, Sun XF, Zhang YZ.   +12 more
europepmc   +1 more source

施氮和轮作对 黄土高原 旱 塬 区 土壤 温 室 气 体排放的影响

, 2015
农田生态系统是温室气体（N 2 O、CH 4 和 CO 2 ）重要的排放源，其排放量分 别占全球 N 2 O、CH 4 和 CO 2 总排放的 60%、50% 和 10%。全球干旱和半干旱地 区农田面积占全球农田总面积的 80%，贡献了全球粮食总产量的 60%。我国旱地 约占国土总面积的 70%，干旱半干旱耕地占总耕地面积的 43%，主要分布在西北 地区。我国西北黄土高原为典型的雨养农业区，面积 60 万 km 2 ，其中农田面积 14.58 万 km 2 ，70%属于雨养农业 ...
姜继韶
core  

[Chinese expert consensus on the diagnosis and treatment of human immunodeficiency virus infection related diffuse large B cell lymphoma (2025)]. [PDF]

Zhonghua Xue Ye Xue Za Zhi
Lymphoid Disease Group, Chinese Society of Hematology, Chinese Medical Association, Lymphoma Integrative Rehabilitation Professional Committee of Chinese Anti-Cancer Association (CACA), Central and Western China AIDS Lymphoma League (CALL), Lymphoma Expert Committee of Chinese Society of Clinical Oncology (CSCO).   +5 more
europepmc   +1 more source

[Recent advances in the applications of metal-organic frameworks-based molecularly imprinted materials]. [PDF]

Se Pu, 2023
Liu W, Jia DX, Lian WH, Zhao Y.
europepmc   +1 more source

Public Health Care and Clinical Medicine in the Sixteenth Century Joseon: Through the Perspective of Gosachalyo (Selected Essentials on Verified Facts). [PDF]

Uisahak
Lee J.
europepmc   +1 more source

[Quantitative determination of tetrodotoxin in poisoned biological samples by two-dimensional liquid chromatography-tandem mass spectrometry]. [PDF]

Se Pu
Fang L, Qiu FM, Wang YC.
europepmc   +1 more source

[Chinese expert consensus on standard procedures for the outpatient management of patients with multiple myeloma (2025)]. [PDF]

Zhonghua Xue Ye Xue Za Zhi
Plasma Cell Disease Group, Chinese Society of Hematology, Chinese Medical Association, Hematology Society of China Medicine Education Association.   +3 more
europepmc   +1 more source

设施农业不同种植模式系统生产力与土壤生物特性研究

Shuitu Baochi Xuebao, 2006
依据在陕西延安日光温室内的田间试验，对黄瓜与不同作物建立的种植模式系统生产力与土壤生物特性进行了研究。结果表明，冬春茬黄瓜收获后采用不同的种植模式，其系统生产力与土壤生物特性发生明显变化。由小青菜、豇豆与黄瓜组成种植模式的系统产品生产力和经济生产力最高，翻青玉米、四季豆与黄瓜组成的模式次之。豇豆作为前茬处理的土壤呼吸强度最高，翻青玉米、四季豆、翻青黑豆和CK处理的土壤呼吸强度次之，番茄和小青菜处理的土壤呼吸强度较低。黄瓜收获后利用夏季休闲3～4个月对降低土壤细菌和真菌数量的效果最好 ...
doaj