ABSTRACT
This study was conducted to reveal the effects of silicon (Si) application on nutrient utilization efficiency by rice and on soil nutrient availability and soil microorganisms in a hybrid rice double-cropping planting system. A series of field experiments were conducted during 2017 and 2018. The results showed that Si nutrient supply improved grain yield and the utilization rates of nitrogen (N) and phosphorus (P) to an appropriate level for both early and late plantings, reaching a maximum at 23.4 kg/ha Si. The same trends were found for the ratios of available N (AN) to total N (TN) and available P (AP) to total P (TP), the soil microbial biomass carbon (MBC), microbial biomass nitrogen (MBN), microbial biomass phosphorus (MBP), and the ratios of MBN to TN and MBP to TP, at different levels of Si. Statistical analysis further revealed that Si application enhanced rice growth and increased the utilization rate of fertilizer due to an ecological mechanism, i.e., Si supply significantly increased the total amount of soil microorganisms in paddy soil compared to the control. This promoted the mineralization of soil nutrients and improved the availability and reserves of easily mineralized organic nutrients.
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the effects of Carthamus tinctorius on bcl-2, caspase-3 expression of apoptosis of neurons.</p><p><b>METHOD</b>SD rats were randomly divided into ischemia control group, large-dose group, middle-dose group and low-dose group. The middle cerebral artery of rats was occluded for 2h by inserting an introluminal molofilament, and reperfusion was then instituted for 4h or 22h. The brains were stained with 2, 3, 5-triphenylte trazolinm chloride for assessment of volume of infarction, and then embedded onto slides with paraffin for morphological assessment and immunohistochemistry was carried out to investigate the changes in bcl-2 and caspase-3.</p><p><b>RESULT</b>All treated groups at different times decreased the volume of infarction (P < 0.05), while large-dose group showed more distinct decrease than other groups (P < 0.05). All treated groups at different times increased bcl-2 and decreased caspase-3 expression as well, while large-dose group showed more distinct effect (P < 0.05).</p><p><b>CONCLUSION</b>C. tinctorius injection can reduce the volume of cerebral infarction, and increased bcl-2 and decreased caspase-3 expression.</p>
Subject(s)
Animals , Female , Male , Rats , Apoptosis , Brain , Metabolism , Pathology , Carthamus tinctorius , Chemistry , Caspase 3 , Caspases , Metabolism , Dose-Response Relationship, Drug , Drugs, Chinese Herbal , Pharmacology , Infarction, Middle Cerebral Artery , Metabolism , Pathology , Neurons , Cell Biology , Metabolism , Plants, Medicinal , Chemistry , Proto-Oncogene Proteins c-bcl-2 , Metabolism , Random Allocation , Rats, Sprague-Dawley , Reperfusion Injury , Metabolism , PathologyABSTRACT
Aim To study the actions of Luofendeine and its component. Methods LD50 tests of Luofendeine and its component, heat_board text and body_twisting test of mice were pertormed to learn its analgesic and antiinflammatory actions. Results The analgesic action and antiinflammatory action were increased when codamine was mixed with buluofen by the rate of 13∶200,without increasing its toxicity. Conclution The complex prescription of Luofendeine is rational and can increase the analgesic action obviously.