Results 61 to 70 of about 330 (114)

生物质炭对旱作农田土壤持水特性的影响

Shuitu Baochi Xuebao, 2017
为确定添加生物质炭对旱作农田土壤持水特性的影响，在隆中黄土高原典型旱作农田区设置相关定位试验，对不同生物质炭输入水平的土壤容重、土壤孔隙度、土壤水分常数及土壤水分特征曲线进行测定。结果表明，生物质炭的添加能够减小土壤容重，增加土壤孔隙度。随着生物质炭输入水平的增加，土壤容重的减小及土壤孔隙度的增加幅度加大。生物质炭达到50 t/hm2时土壤结构变化最为明显，0—5，5—10，10—30 cm土层中土壤容重相比对照分别减小7.01%，9.91%，16.60%，土壤毛管孔隙度分别增加19.47%，21.02%
刘小宁, 蔡立群, 黄益宗, 董, 南学军, 高志强   +5 more
doaj  

掺砂量对中度盐碱土壤水力特性及溶质运移过程的影响

Shuitu Baochi Xuebao
[目的] 为探究不同掺砂量对中度盐碱土壤水力特性和溶质运移过程的影响。[方法] 采用室内土柱试验,设置4种掺砂比例CK (掺砂0)、B1(掺砂10%)、B2(掺砂15%)、B3(掺砂20%),研究中度盐碱土壤在不同掺砂量条件下的土壤水力特性和溶质运移过程变化规律并进行模型模拟。[结果] (1)掺砂量在0~20%内,中度盐碱土掺砂明显影响土壤水分特征曲线变化,掺砂比例越大,曲线越靠近Y轴。在任一吸力条件下土壤含水率表现为CK＞B1＞B2＞B3。且掺砂比例越大,土壤小孔隙数量越多,微小孔隙减少 ...
高素素, 陈继虹, 李王成, 牛宵宵, 贾振江, 吴洋洋, 马东祥, 吕航   +7 more
doaj  

[Development and validation of a risk prediction model for cognitive impairment in rural elderly Chinese populations: evidence from the CHARLS study]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Wang F, Li W, Shang X, Li F.
europepmc   +1 more source

[Determination of eight ultraviolet absorbers in surface water and wastewater by ultra performance liquid chromatography-triple quadrupole mass spectrometry]. [PDF]

Se Pu
Sun HJ, Zhang BB, Huang MQ, Wang H, Hu GJ, Chen HM.   +5 more
europepmc   +1 more source

[The application of thrombopoietin receptor agonists in the treatment of non-muscle myosin heavy chain 9-related disease]. [PDF]

Zhonghua Xue Ye Xue Za Zhi
Gong Y, Chen WL, Hu YJ, Mei H, Wang YD.
europepmc   +1 more source

[Determination of tetracyclines in animal muscle tissues by ultra performance liquid chromatography- tandem mass spectrometry]. [PDF]

Se Pu
Chu K, Li JH, Wang QQ, Li XT, Wu S, Chen C.   +5 more
europepmc   +1 more source

[Efficient separation of gossypol from cotton kernels with copper mediated magnetic molecularly imprinted polymer]. [PDF]

Se Pu
Yang SL, Cao Y, He KL, Feng S, Zhang CG, Shan LH.   +5 more
europepmc   +1 more source

[Analysis of dietary composition in patients with liver cirrhosis: an observational study based on the database from the National Health and Nutrition Examination survey]. [PDF]

Zhonghua Gan Zang Bing Za Zhi
Chen XY, Yu ZQ, Bai XY, Ruan GC, Guo MY, Han W, Yang H.   +6 more
europepmc   +1 more source

[Racial differences in treatment and prognosis of gastric signet ring cell carcinoma: analysis based on SEER and TCGA databases]. [PDF]

Nan Fang Yi Ke Da Xue Xue Bao
Fang S, Liu J, Yue X, Li H, Li W, Tang X, Bao P.   +6 more
europepmc   +1 more source

[A Study of the Association and Interaction Between Organophosphorus Pesticide Exposure and Insulin Resistance in Non-diabetic Adults]. [PDF]

Sichuan Da Xue Xue Bao Yi Xue Ban
Zhu X, Wang Z, Zhang Y, Li K, Zeng W, Guo B.   +5 more
europepmc   +1 more source