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The susceptibility of purple soil and intensive tillage render the land prone to erosion under heavy precipitations in a sloping cropland in southwestern China. This study aimed to improve the evaluation of the potential benefits of surface protection tillage and organic matter addition to decreasing nutrient losses. A field plot experiment under natural rainfall conditions was conducted, which employed four management practices: conventional downslope tillage system as control (CK), contour tillage (CT) with organic matter addition (CT + OM), CT with wheat straw mulching (CT + SM), and CT combining straw mulching and organic matter addition (CT + OM + SM). Runoff depth, nutrient loads, and soil erodibility were used to estimate the effects of straw mulching and organic matter addition. Results indicated that the runoff depth under CK was largest during the experimental period, with an average of 16.91 mm, and runoff coefficient average was 32%. Compared with CK, the runoff depth under CT + OM, CT + SM, and CT + OM + SM were reduced by 19%, 34%, and 50%, respectively. A significant difference in soil erodibility indicator among the four treatments was indicated (p −1 mm −1 . Meanwhile, soil erodibility under CT + OM, CT + SM, and CT + OM + SM were 8.49, 6.99, and 6.87 kg ha −1 mm −1 , respectively. These values were 14%, 29%, and 30% lower than that of CK, respectively. CK was more susceptible to accelerated erosion compared with the plots with a surface cover or organic addition. This greater erodibility resulted in higher runoff, sediment yield, and associated nutrient loss for CK. The runoff-associated nitrogen losses were mainly controlled by the runoff rate and soil erodibility (p 3 − –N and NH 4 + –N concentration in runoff water were markedly affected by rainfall events and agricultural practice. A significant logarithmic correlation between NO 3 − –N load and runoff depth was identified. NO 3 − –N was proven to be the main form of inorganic nitrogen loss; therefore, fertilizer application of NO 3 − –N should be reduced in the purple soil region. Soil erodibility significantly influenced the available N losses (p

To study the mechanism of the transforming growth factor-β(TGF-β) in Ginsenoside Rb1 against the replicative senescence of human umbilical vein endothelial cells (HUVECs). Replicative Senescence model was established by serial subcultivation of primary HUVECs in vitro. Then, Cells were divided

Nuclear factor-κB plays a critical role in endothelial senescence. However, the mechanisms remain unclear. We hypothesized that the alteration of S-Nitrosylation of NF-κB p65 may contribute to hydrogen peroxide-induced endothelial cell senescence. The human umbilical vein endothelial cells (

To study the mechanism of the oxidative damage in Ginsenoside Rb1 against the intrinsic aging of mouse brain. Female C57BL/6 mice were divided into three groups randomly: control group(4 months, n=12); model group(24 months, n=12) and drug group(24 months, n=12). In drug group, ginsenoside Rb1(20mg

Overweight and obesity have become a public health problem. In obese state, abundant fatty free acids (FFA) were released from hyperplastic adipose tissue and were release to adipocytes, skeletal muscle, liver, then leading to adipocytes inflammation and insulin resistance. Ginsenoside Rb1 was

To study the mechanism of the mTOR in Ginsenoside Rb1 against the intrinsic aging of mouse brain. Female C57BL/6 mice were divided into three groups randomly: control group(4 months, n=12); model group(24 months, n=12) and drug group(24 months, n=12). In drug group, ginsenoside Rb1(20mg.kg-1.d-1)

To uncover the clinical roles of Soluble Urokinase-type Plasminogen Activator Receptor (su-PAR) in different types of coronary heart disease. We divided all the cases into four groups: 30 cases in NCAD group, 20 cases in SA group, 25 cases in UA group, 30 cases in AMI group. In all these groups