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Objective: To explore the influencing factors of malnutrition in elderly patients with heart failure (HF) and the effects of early enteral nutrition on cardiac function, nutritional status and intestinal mucosal barrier function in patients with malnutrition. 180 elderly patients with HF who were treated in our hospital from February 2021 to April 2022 were selected as the research objects. After admission, the nutritional status of all patients was evaluated according to the short-form mini-nutritional assessment (MNA-SF). According to the MNA-SF score results, they were divided into malnutrition group (n=83) and normal nutrition group (n=97). Univariate and multivariate Logistic regression were used to analyze the risk factors of malnutrition in elderly patients with HF. The elderly patients with HF malnutrition were given early enteral nutrition intervention, and the changes situation of cardiac function, nutritional status and intestinal mucosal barrier function were observed before treatment and 1 week after treatment. There were no significant correlation between malnutrition in elderly patients with HF and gender, residence, drinking history, etiology, occupational category, glutamic-pyruvic transaminase, serum creatinine, systolic blood pressure (SBP) and diastolic blood pressure (DBP) (P>0.05), and were associated with age, medical insurance type, disease course, marital status, New York Heart Association (NYHA) classification, educational level, C-reactive protein (CRP), family per capita monthly income, B-type brain natriuretic peptide (BNP), smoking history, left ventricular ejection fraction (LVEF) (P<0.05). Logistic regression analysis showed that longer disease course, higher CRP, higher BNP, NYHA classification IV, older age and smoking history were risk factors for malnutrition in elderly patients with HF (P<0.05). 1 week after treatment, LVEF was increased in elderly patients with HF with malnutrition group, and BNP was decreased (P<0.05). 1 weekafter treatment, the levels of prealbumin (PA) and transferrin (TRF) in elderly patients with HF in the malnutrition group were increased (P<0.05). 1 week after treatment, D-lactic acid (D-LAC), diamine oxidase (DAO) and intestinal fatty acid binding protein (IFABP) in elderly patients with HF in the malnutrition group were decreased (P<0.05). Malnutrition in elderly patients with HF is affected by the disease course, CRP, BNP, NYHA classification, age, smoking history and other factors. Early enteral nutrition for elderly patients with HF malnutrition is helpful to improve their cardiac function, nutritional status and intestinal mucosal barrier function. [ABSTRACT FROM AUTHOR]

We studied the effects of light intensity and nitrogen concentration on photosynthetic physiological parameters in clonal ramets of Dicranopteris dichotoma. Different levels of light intensity(light shading, L1; medium shading, L2; and heavy shading, L3) and nitrogen concentrations(control, N0; low nitrogen, N1; moderate nitrogen, N2; and high nitrogen, N3) were used, and differences in the photoresponse process, photosynthetic pigment content, and chlorophyll fluorescence induction kinetic parameters of potted D. dichotoma were analyzed. Under L1 treatment, photoinhibition was observed. Nitrogen application improved the net photosynthetic rate(Pn), stomatal conductance(Gs), transpiration rate(Tr), and fluorescence intensity(F) of D. dichotoma. The ramets under the N2 treatment had the largest light ecological amplitude, with a 37.9% higher Pn than that under N0 treatment. Under L2 treatment, the dark respiration rate(Rd) of the ramets was lower than that under L1 treatment. Nitrogen application enhanced the light utilization capacity of D. dichotoma. The performance index was the highest under L2 N2 treatment, reaching 1.78. Under L3 condition, the Pn, F, and specific activity parameters of D. dichotoma decreased with nitrogen concentration. Light intensity had a significant effect on photosynthetic pigment content(P<0.05), and nitrogen application promoted the content of chlorophyll a and total chlorophyll. It was concluded that D. dichotoma under L1 N2 treatment had the highest photosynthetic potential. The L2 N2 treatment was the most suitable for D. dichotoma to accumulate photosynthate, with the highest activity of photosynthetic system II. Under L3 condition, nitrogen application was not conducive to the growth of D. dichotoma. [ABSTRACT FROM AUTHOR]

We studied the effects of light intensity and nitrogen concentration on photosynthetic physiological parameters in clonal ramets of Dicranopteris dichotoma. Different levels of light intensity(light shading, L1; medium shading, L2; and heavy shading, L3) and nitrogen concentrations(control, N0; low nitrogen, N1; moderate nitrogen, N2; and high nitrogen, N3) were used, and differences in the photoresponse process, photosynthetic pigment content, and chlorophyll fluorescence induction kinetic parameters of potted D. dichotoma were analyzed. Under L1 treatment, photoinhibition was observed. Nitrogen application improved the net photosynthetic rate(Pn), stomatal conductance(Gs), transpiration rate(Tr), and fluorescence intensity(F) of D. dichotoma. The ramets under the N2 treatment had the largest light ecological amplitude, with a 37.9% higher Pn than that under N0 treatment. Under L2 treatment, the dark respiration rate(Rd) of the ramets was lower than that under L1 treatment. Nitrogen application enhanced the light utilization capacity of D. dichotoma. The performance index was the highest under L2N2 treatment, reaching 1.78. Under L3 condition, the Pn, F, and specific activity parameters of D. dichotoma decreased with nitrogen concentration. Light intensity had a significant effect on photosynthetic pigment content(P<0.05), and nitrogen application promoted the content of chlorophyll a and total chlorophyll. It was concluded that D. dichotoma under L1N2 treatment had the highest photosynthetic potential. The L2N2 treatment was the most suitable for D. dichotoma to accumulate photosynthate, with the highest activity of photosynthetic system Ⅱ. Under L3 condition, nitrogen application was not conducive to the growth of D. dichotoma. [ABSTRACT FROM AUTHOR]

In order to improve the yield of peanut, the effect of nitrogen application on agronomic characters and yield of peanut was studied. In this study, Yuanza 9102, Kainong 176, Zhuhua 2 and Yuhua 23 were selected as test materials and three different levels of nitrogen fertilizer treatments were used, no nitrogen (0), medium nitrogen (150 kg / hm 2 ) and high nitrogen (300 kg / hm ² ). Split-plot experiment was conducted to study the effects of different nitrogen fertilizer treatments on the agronomic characters and yield of peanut. The results showed that the agronomic characters of medium nitrogen application were significantly higher than those of the control and high nitrogen application. With the gradual maturity of peanut pods, medium nitrogen application was significantly higher than that of the control and high nitrogen application in terms of full fruit rate,100 kernel weight and yield. Taken together, medium nitrogen(150 kg / hm ² ) performed the best. [ABSTRACT FROM AUTHOR]