Shuitu Baochi Xuebao[目的] 为明确侵蚀—沉积在黑土坡耕地土壤质量空间分异格局中的塑造作用。[方法] 以东北典型水蚀区坡耕地为研究对象,利用110个样点的土壤属性,采用基于最小数据集的土壤质量指数(SQI)指标,评价坡面尺度土壤质量的空间分异特征,并利用广义线性模型(GLM)明确坡度、坡位、土层深度等因子对土壤质量的贡献。[结果] (1)坡耕地土壤养分含量和空间特征在耕作层和亚表层间呈相反规律。对于大部分养分指标,耕作层的含量显著高于亚表层,但是,其空间异质性及土壤养分含量间的相关性低于亚表层(p＜0.05);(2 ...
李林源 +5 more
doaj
Shuitu Baochi Xuebao, 2004 从适用于陡坡的水动力学模型出发,研究坡面水流细沟侵蚀临界状态的判断方法。讨论了坡长、坡度、坡面投影长对细沟侵蚀的影响,采用临界摩阻流速随坡度变化、临界摩阻流速不随坡度改变两种假定分别进行模拟计算,以摩阻流速作为判别坡面细沟流侵蚀临界状态的水动力学指标,在给定的坡面尺寸、净雨强和初始微地形条件下,计算得出了细沟流摩阻流速达到临界值时所对应的坡度。
邵学军 王远航 胡慧武
doaj
Shuitu Baochi Xuebao目的为探究不同坡度及降雨径流条件下坡面细沟侵蚀特征。方法采用连续模拟降雨和上方汇流试验的方法，研究2种坡度（5°、10°）和3种降雨径流阶段（降雨、汇流、降雨+汇流）下坡面侵蚀过程。结果坡面径流量和侵蚀量随坡度的增加而增加，在5°坡度下降雨条件的坡面径流量和侵蚀量分别是汇流条件的1.06、2.23倍，而在10°坡度下其坡面径流量和侵蚀量分别是汇流条件的1.26、3.34倍。产流率随时间变化均呈先增加后趋于平稳的变化特征，初始产流时间随降雨次数的递增和坡度的增加不断提前，且稳定产流率和产沙率也呈增大趋势 ...
王婷婷 +6 more
doaj
[Safety of blinatumomab combined with dasatinib in the treatment of pediatric Philadelphia chromosome-positive acute lymphoblastic leukemia]. [PDF]
Zhongguo Dang Dai Er Ke Za ZhiZheng FY +5 more
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[Comparison of effectiveness between infrapatellar and semi-extended parapatellar approaches for intramedullary nailing in treatment of type A tibial shaft fractures]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiZhao Y +6 more
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[Rapid determination of venetoclax in plasma by ultra performance liquid chromatography-tandem mass spectrometry]. [PDF]
Se PuZhu Y, Ma XL, Yu SL, Qiu L.
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[Research progress of tibial tunnel positioning techniques in posterior cruciate ligament reconstruction]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiLi R, Liao Y, Guo F, Chen Q, Li S, He C.
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[Epidemiological characteristics of intussusception in children aged 0-3 years in Jiangsu Province from 2018 to 2023]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanWang Y, Gao X, Liu Z, Zhan S.
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[Aerobic exercise regulates macrophage polarization and improves insulin resistance in mice: the mediating role of miR-221-3p]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoLi N, Zhang L, Guo Q, Zhou Y, Liu C.
europepmc +1 more source
[Clinical analysis of endoscopic transnasal resection of skull base chondrosarcoma]. [PDF]
Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za ZhiYang X, Yan B, Wei W, Liu J, Wang Z.
europepmc +1 more source