Results 41 to 50 of about 140 (103)

Handbook on cross-border transport and ancillary facilities along the Asian highway network routes 3 and 4 [PDF]

open access: yes, 2017
On 8 December 2016, the Governments of China, Mongolia and the Russian Federation signed an Intergovernmental Agreement on International Road Transport along the Asian Highway Network.
UN.ESCAP
core  

渭北旱塬苹果园集雨保墒措施对土壤水分、根系及降雨利用的影响

open access: yesShuitu Baochi Xuebao
目的渭北旱塬为典型的雨养农业区,降雨时空分布不均,果树关键生育期水分供应不足,为探讨苹果园降水集蓄促渗保墒增碳措施对渭北旱塬区降水资源的利用效果。方法以苹果生产园区常规有机覆盖管理为对照(CK),探讨果园降水集蓄促渗保墒增碳方法(rain collection and infiltration carburizing technology,RCIC)对苹果园土壤水分及其亏缺状态、苹果树根系生长、光合特征、苹果产量与降雨利用效率的影响。结果RCIC系统通过“表层截留-深层渗透 ...
倪文乐   +7 more
doaj  

榆林南部丘陵沟壑区树木引种适宜性评估

open access: yesShuitu Baochi Xuebao, 1996
榆林南部丘陵沟壑区,选择有代表性的米脂县高家沟、远志山村,建立树木(果树)引种观察园。80年代初引进树种34科67属114种278个品种,经过14年的自然选择,选出适宜本区生长经济效益较好的16科32属47种106个品种。1987~1993年树木园土不下山,水不出沟,减沙104874t/(km2·a)。油松、刺槐、桃树等林地比农地土壤0~10cm含水量增加6.8%~59.2%,11cm以下则有减少趋势。杏树、胡颓子、柠条等地比农地0~10cm土壤含水量减少16.4%~33.8%。苹果的经济效益最高 ...
张铭林   +7 more
doaj  

氮磷配施对苹果幼苗生长、土壤无机磷形态和磷素利用的影响

open access: yesShuitu Baochi Xuebao, 2021
以矮化苹果砧木M9T337幼苗为试材,设置4个氮水平(N 0,150,300,450 mg/kg,分别以N0、N1、N2、N3表示)和2个磷水平(P2O5 100,200 mg/kg,分别以P1、P2表示),研究了氮磷配施对苹果砧木幼苗生长、土壤无机磷形态转化和磷素吸收利用的影响,以期为果园磷肥高效利用提供参考依据。结果表明,不同氮磷配施显著影响M9T337幼苗生物量及根系形态,以N2P2处理效果最佳,其次为N1P2处理。植株磷素积累量及磷肥利用率分别在N2P2、N2P1处理下达到最大值 ...
张鑫   +6 more
doaj  

[Related factors of endogenous erythropoietin and its association with 10-year risks of cardiovascular disease in a community-based Chinese study]. [PDF]

open access: yesBeijing Da Xue Xue Bao Yi Xue Ban, 2023
Chen CY   +9 more
europepmc   +1 more source

Faith, Hope & the Global Economy : A Power for Good [PDF]

open access: yes, 2018
Translation of:Faith, Hope & the Global Economy, first published 2012 by Intervarsity-Press, Nottingham, England一种为善的力量 对于受债务与危机困扰的全球经济,信仰能提供什么希望吗? 理查德·希金森指出,如果我们正确地理解基督教信仰,它会成为全球经济 中一种巨大的为善的力量。它激励企业,减轻贫困,促进正直,鼓励持续, 造就门徒 ...
Higginson, Richard
core  

[Systemic light chain amyloidosis with the manifestation of recurrent spontaneous liver rupture: a case report]. [PDF]

open access: yesZhonghua Xue Ye Xue Za Zhi, 2021
Zhi F   +9 more
europepmc   +1 more source

不同浓度棉隆熏蒸对老龄苹果园土壤微生物环境的动态影响

open access: yesShuitu Baochi Xuebao, 2018
通过向25年老龄苹果园土壤中施入不同浓度(T1,0.02‰;T2,0.1‰;T3,0.5‰)的棉隆,利用微生物平板培养、荧光定量PCR(qPCR)、微生物碳源利用(biolog-ECO)、末端限制性片段长度多态性(T-RFLP)、生物多样性指数Biodap等方法研究不同浓度棉隆熏蒸下土壤可培养微生物(细菌、真菌)数量、群落结构及其多样性指数随时间变化的演变趋势,并进行平邑甜茶盆栽验证,以期为减轻苹果连作障碍筛选棉隆浓度提供理论依据。结果表明:0.1 ...
徐少卓   +6 more
doaj  

[A multicenter study on the tolerance of intravenous low-dose cyclophosphamide in systemic lupus erythematosus]. [PDF]

open access: yesBeijing Da Xue Xue Bao Yi Xue Ban, 2022
Shao M   +16 more
europepmc   +1 more source

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