Results 41 to 50 of about 965 (93)

人工降雨对稻田中氮磷动态变化的影响研究

Shuitu Baochi Xuebao, 2011
在水稻黄熟期,通过对微区模拟稻田进行人工降雨试验,分析了60,48,17.4 mm/h 3个雨强处理(分别表示为y-b、y-m、y-s)条件下,不同滞水时间的田面水中氮磷的动态特征以及总氮、总磷的流失潜能,研究了不同雨强和滞水时间对稻田氮磷的减排效能。结果表明:(1)在3个雨强处理下,田面水中TN浓度在人工降雨后1 h为最高,y-s的田面水中TN浓度下降迅速;y-m和y-b的田面水积聚量较大,但在第5 d时其TN浓度也迅速下降到最低值。田面水中NH+4-N浓度整体水平较低,NO-3-N浓度总体水平较高 ...
冯国禄, 龚军慧
doaj  

[Analysis of the characteristics and changing trends of burn disease burden in the Chinese population based on the GBD 2021 database]. [PDF]

Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi
Liang JY, Xi MM, Tang N, Tian W, Zhang J, Peng JY, Xin YZ, Ivers R, Ye PP, Tian MY.   +9 more
europepmc   +1 more source

[Apply the Miettinen Formula to Assess the Health Benefits of the PM_2.5 Simulation Intervention on Metabolic Syndrome]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Chen K, Han X, Yang Y, Wang P.
europepmc   +1 more source

Public Emotional and Thematic Responses to Major Emergencies on Social Media, 2024-2025: Cross-Sectional Convergent Mixed Methods Study. [PDF]

J Med Internet Res
Guo X, Fan Y, Guo Y.
europepmc   +1 more source

黄土丘陵区人工移植生物结皮集雨面的集雨效率及其抗侵蚀破损能力

Shuitu Baochi Xuebao
[目的] 为探讨黄土丘陵区不同类型人工生物结皮集雨面的集雨效果及抗侵蚀破损能力。[方法] 以人工移植培养的藻类和藓类生物结皮为研究对象,以裸土为对照,分别对其进行野外模拟降雨和抗侵蚀试验(坡面冲刷、土壤静水崩解和单雨滴溅蚀试验),分析不同类型集雨面的集雨效率与土壤抗冲系数、土壤崩解速率和溅蚀量等抗侵蚀能力指标的差异。[结果] (1)生物结皮集雨面显著提高集雨效率。当雨强为100 mm/h时,相较于裸土,生物结皮集雨面的集雨效率显著提高33.3%(F=300.12 ...
陈钧儒, 江子昊, 肖波, 窦韦强
doaj  

[Clinical significance and occurrence mechanism of hepatitis B virus DNA integration]. [PDF]

Zhonghua Gan Zang Bing Za Zhi
Shi YJ, Zhang KX, Li MY, Lu DJ, Chen XM.
europepmc   +1 more source

[Impact of tibial tunnel position in artificial posterior cruciate ligament reconstruction on postoperative knee function and stability]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Zhao Y, Wang C.
europepmc   +1 more source

[Development of a Risk Prediction Model for Moderate-to-Severe Complications Associated With Peripheral Intravenous Catheters in Older Patients]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Chen X, Guo Y, Liang Z, Li L.
europepmc   +1 more source

[Effectiveness and cost-effectiveness of risk-based topical fluoride intervention on early childhood caries in Jiangnan District, Nanning City]. [PDF]

Hua Xi Kou Qiang Yi Xue Za Zhi
Jiang Y, Li Y, Zhang Y, Liu F, Li L, Deng S, Qin Y, Yu J, Qiu R.   +8 more
europepmc   +1 more source

Mendelian randomization studies on cardiometabolic factors and intracranial aneurysms: A systematic literature analysis. [PDF]

Zhong Nan Da Xue Xue Bao Yi Xue Ban
Wang Y, Liu J, Cao F, Guo Y, Yan J.
europepmc   +1 more source