[Objectives] This study was conducted to investigate the similarity and differences between TLR4 knockout mice and C57 BL/6 mice used in liver fibrosis research in terms of growth rate and reproduction ability. [Methods] Twenty TLR4 knockout mice and C57 BL/6 mice, half male and half female, were selected to compare the growth rates of body weight and body length of mice from the 4 th to 12 th weeks; and 20 pairs of male and female mice of the same strain were compared for the number of baby mice of the second litter. [Results] The growth rates of body weight and body length of the TLR4 knockout mice were significantly lower than those of C57 BL/6 mice（P＜0.05）(except for the 4 th and 5 th weeks when there was no significant difference in body length); and in terms of reproductive ability, the TLR4 knockout mice were significantly lower than the C57 BL/6 mice（the ratio of the total number of baby mice in the second litter of the two strains, 72∶147）. [Conclusions] Knockout of the TLR4 gene has a significant impact on the growth and reproduction of mice.
The roots of Angelica dahurica are a commonly used traditional Chinese herbal medicine. It has the effects of dispelling wind and relieving pain, expelling pus and dispersing swelling, clearing the nasal orifices, and eliminating dampness. In recent years, the cultivation of A. dahurica in Hunan Province has developed rapidly, but the research on new varieties selection and standardized cultivation techniques is lagging behind. This paper reviewed the germplasm resources, variety distribution and standardized cultivation technology of A. dahurica in China, hoping to provide technical support for the development of A. dahurica industry.
[Objectives] This study was conducted to quickly screen out effective and safe agents for controlling tobacco root knot nematode disease. [Methods] Six pesticides were tested and screened indoors at five different concentrations. [Results] The six pesticides all had toxic effects on the second-instar larvae of tobacco root-knot nematode, and the corrected mortality was positively correlated with the concentration and time of the pesticides, with the correlation coefficients above 0.8. From the perspective of inhibitory activity, the order was fosthiazate＞ abamectin＞emamectin benzoate＞cadusafos＞ethoprophos＞carbosulfan. Four pesticides that can be used in the field were selected. [Conclusions] This study provides a theoretical basis for field pesticide selection.
Burkina Faso is one of the least developed countries in the world, and is located on the edge of the desert. Drought and water shortage, backward agricultural infrastructure, lacking of water conservancy and irrigation facilities have caused a great threat to the country’s food security. Promoting the cultivation of hybrid foxtail millet in Burkina Faso can well achieve the "going out" of Chinese agriculture and assist in the completion of agricultural assistance to Burkina Faso after the resumption of diplomatic relations with Burkina Faso. In 2019, Zhangjiakou City Academy of Agricultural Sciences cooperated with CGCOC Agriculture Co., Ltd. to plant hybrid foxtail millet in Burkina Faso, selected three pearl millet varieties that are better promoted locally as control varieties, and found that planting Zhangzagu No.8, No.16 and No.18 with a density of 667 000 plant/hm~2（plant spacing 0.12 m×0.25 m, 2 plants per hole） and a fertilization amount of 0.3 t/hm~2 and sowing in late July are suitable for production management technical regulations of hybrid foxtail millet in Burkina Faso. Because hybrid foxtail millet is superior to local pearl millet in terms of yield, resistance to powdery mildew, and its lodging resistance, it has good prospects for promotion in Burkina Faso.
[Objectives] This study was conducted to explore and rationally use the effective value and nutritional components of wolfberry polysaccharide to provide a basis for the use of new feed resources. [Methods] The premixed feed prepared with the wolfberry polysaccharide additive was applied to fattening Tan sheep in Ningxia, and the effect of the wolfberry polysaccharide additive on the fattening Tan sheep was analyzed, so as to provide technical support for the rational utilization of the wolfberry polysaccharide resources. The study adopted a single-factor comparison method, selecting 84 tan sheep in the fattening period with conform gender, feeding management, weight, age, and physiological status, which were divided into 2 test groups and 1 control group, 28 in each group. [Results] Within 90 d, the weight gain of the group with 0.1% wolfberry polysaccharide additive increased by 6.98%, showing a significant difference（P＜0.05）, and the feed conversion ratio decreased by 9.66%, which was significant as well（P＜0.05）. The gross profit of this group was 125.76 yuan, which was higher than the control group by 57.52 yuan. The group with 0.2% wolfberry polysaccharide additive increased the weight gain by 8.63%, which was significant（P＜0.05）, and the feed conversion ratio decreased by 10.80%, which was significant as well（P＜0.05）. The gross profit of group 2 was 125.76 yuan, which was higher than the control group by 63.41 yuan. There were no significant differences in weight gain, feed conversion ratio and gross profit between the groups with 0.1% and 0.2% of wolfberry polysaccharide additive. The results showed that the use of wolfberry polysaccharide additive premixed feed has a positive effect on increasing the weight gain of fattening Tan sheep, reducing the feed conversion ratio, and improving the feed conversion efficiency. The addition of 0.1% and 0.2% of the wolfberry polysaccharide additive premixed feed had no significant differences. [Conclusions] The wolfberry polysaccharide additive has a positive effect on increasing the weight gain of fattening Tan sheep, reducing the feed conversion ratio, and improving the feed conversion efficiency.
