Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： China’s economic growth slowed down in 2022 due to the COVID-19 pandemic and the corresponding measures. There are great uncertainties in China’s economic development in 2023. It is expected that China’s medium and long-term economic growth rate will show a wavy downward trend. Based on input-output technology, econometrics, prosperity analysis, expert analysis, and scenario analysis, this study proposes a systematic integrated factor prediction approach on annual GDP growth. Through analysis of China’s economic growth in 2022 and the current situation worldwide, China’s economic growth rate is predicted to be about 6.0% in 2023, reverting to the normal level. The policy recommendations are further put forward based on the analysis, including strengthening the adjustment of macro-policy, implementing proactive fiscal policy and prudent monetary policy, boosting domestic consumption, increasing employment and promoting investment, striving to stabilize the macro-economic market, preventing and defusing risks in major fields, and leveraging China’s advantages in the global industrial chain.
Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： Pig industry is the pillar industry of animal husbandry in China and serves as a key part of the agricultural modernization system. However, the serious shortage of feeding protein resources and the low utilization rate of non-grain protein resources have restricted the development of modernization of animal husbandry in China. Therefore, according to the spirit of the Nineteenth National Congress of the CPC Central Committee and based on the Structural Reform of Supply-Side, this article offered relevant suggestions on the challenges faced by the current pig industry, which will further guide the development of animal husbandry and feed industry with “environmental friendliness and resource conservation”.
Subjects: Biology >> Zoology submitted time 2018-12-24 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在研究不同高粱水平低粗蛋白质（CP）饲粮对生长猪生长性能、肉品质和血清氨基酸浓度的影响。试验选取36头体重（30±7） kg的二元杂交（杜洛克×长白）生长猪，随机分为6个组，每组6个重复，每个重复1只猪。各组饲喂高粱和CP水平分别为0和18%（A组）、0和15%（B组）、20%和15%（C组）、50%和15%（D组）、80%和15%（E组）、50%和18%（F组）的试验饲粮。预试期6 d，正试期35 d。结果表明：1)饲粮CP水平降低3%的条件下，A组和B组之间、D组和F组之间平均日采食量、平均日增重和料重比没有显著差异（P＞0.05）。在饲粮CP水平为18%的条件下，F组平均日采食量极显著高于A组（P＜0.01），平均日增重显著高于A组（P＜0.05）。在饲粮CP水平为15%的条件下，D和E组平均日采食量极显著高于B组（P＜0.01），E组平均日增重显著高于B组（P＜0.05）。2)各组之间肉品质指标均无显著差异(P＞0.05)。3)饲粮CP水平降低3%的条件下，A组和B组之间前腔静脉、肠系膜静脉和门静脉血清氨基酸浓度差异不显著(P＞0.05)；在饲粮CP水平为15%的条件下，与B组相比，C、D、E组前腔静脉、肠系膜静脉和门静脉血清中必需氨基酸组氨酸浓度均降低，而前腔静脉中非必需氨基酸脯氨酸、丝氨酸、丙氨酸浓度升高，肠系膜静脉和门静脉血清中非必需氨基酸脯氨酸、丙氨酸浓度升高。由此可见，在饲粮CP水平为15%的条件下，20%~80%高粱水平都可以替代玉米成为生长猪能量饲料原料。
Subjects: Biology >> Zoology submitted time 2018-12-24 Cooperative journals: 《动物营养学报》
Abstract：本试验在分析了22种饲料原料中α-半乳甘露聚糖(α-GM)、β-半乳甘露聚糖(β-GM)和半乳甘露聚糖(GM)含量的基础上，研究了饲粮豆粕水平与β-甘露聚糖酶(β-MN)对断奶仔猪血清α-GM、β-GM、GM含量，血清生化指标，以及肠道溶质载体家族7成员1(SLC7A1)、溶质载体家族7成员11(SLC7A11)、溶质载体家族38成员2(SLC38A2)基因相对表达量的影响。试验采用2×2因子设计，将24头初始体重接近的健康二元杂交断奶仔猪随机分为4组（Ⅰ、Ⅱ、Ⅲ、Ⅳ组），每组6个重复，每个重复1头猪。Ⅰ组饲喂22%豆粕水平饲粮，Ⅱ组饲喂22%豆粕水平并添加0.02% β-MN的饲粮，Ⅲ组饲喂37%豆粕水平饲粮，Ⅳ组饲喂37%豆粕水平并添加0.02% β-MN的饲粮。试验期为30 d。在第30天对24头仔猪进行颈动脉、肠系膜静脉以及肝门静脉采血10 mL，检测血清中α-GM、β-GM和GM含量；对前腔静脉采血10 mL，检测血清生化指标；并取空肠前端和回肠后端，检测SLC7A1、SLC7A11、SLC38A2基因相对表达量。结果表明：与Ⅰ组相比，Ⅲ组断奶仔猪平均日采食量(ADFI)和回肠SLC7A1基因相对表达量均显著降低（P<0.05），Ⅲ组断奶仔猪平均日采食α-GM含量，颈动脉血清β-GM含量，肠系膜静脉血清β-GM、GM含量，前腔静脉血清谷丙转氨酶、谷草转氨酶活性和尿素氮含量均显著升高（P<0.05）；Ⅱ组断奶仔猪肠系膜静脉血清α-GM含量及肝门静脉血清α-GM和GM含量均显著降低（P<0.05），前腔静脉血清葡萄糖、钙和高密度脂蛋白含量均显著升高（P<0.05）。与Ⅲ组相比，Ⅳ组断奶仔猪肝门静脉血清GM含量显著降低（P<0.05），空肠SLC7A1、SLC7A11和SLC38A2基因相对表达量均显著升高（P<0.05）。由此可见，仔猪平均日采食α-GM的含量升高，可降低仔猪ADFI；肝门静脉、颈动脉和肠系膜静脉血清α-GM、β-GM和GM含量随饲粮α-GM、β-GM和GM含量的增加而增加。饲粮α-GM、β-GM和GM含量增加时，添加β-MN可降低肝门静脉血清GM含量，上调空肠SLC7A1、SLC7A11和SLC38A2基因相对表达量。
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