Microplastics(<5 mm)are ubiquitous in the environment and can pose potential danger to the ecosystem and even human health.As the sink of microplastics,the ocean,especially the densely populated coastal area,has be...Microplastics(<5 mm)are ubiquitous in the environment and can pose potential danger to the ecosystem and even human health.As the sink of microplastics,the ocean,especially the densely populated coastal area,has become a hotspot for research on microplastic pollution.In the last decade,the research of marine microplastics has been rapidly increasing in China.This review summarized the microplastic research conducted in China marine waters so far,and introduced the trends and progress of microplastic research in the four seas along the coast of China.We reviewed and compared the current sampling,extraction,and identification methodologies of China's microplastic research.According to the sampling method,the 30 reviewed studies were separated into two categories,trawl sampling and bulk sampling,to summarize relevant data,including abundance,sizes,shapes,colors and polymer types of microplastics.The main results showed that the distribution of microplastics in China's marine environment varied significantly,with offshore mariculture zones and the South China Sea being the most contaminated areas.Transparent,granules(or pellets)and fibers were the most dominant microplastic colors and shapes,and the size of microplastics was influenced significantly by the sampling method.Polyethylene(PE),polypropylene(PP)and polystyrene(PS)were the most common polymer types found in the China Sea,accounting for 49.96%,29.97%,and 12.38%of the total studies,respectively.Compared with other global data,China's coastal microplastic pollution is at an intermediate level and does not seem to be a major microplastic pollution source.展开更多
试验旨在研究发酵剑麻渣日粮对新西兰大白兔生长性能、屠宰性能和肉品质的影响,为开发新饲料资源并降低剑麻产业下游污染提供参考。选择35日龄平均体重490 g的健康新西兰兔90只,公母各半,随机分成3组,每组15个重复,每个重复2只。3组分...试验旨在研究发酵剑麻渣日粮对新西兰大白兔生长性能、屠宰性能和肉品质的影响,为开发新饲料资源并降低剑麻产业下游污染提供参考。选择35日龄平均体重490 g的健康新西兰兔90只,公母各半,随机分成3组,每组15个重复,每个重复2只。3组分别饲喂基础日粮(对照组)、10%发酵剑麻渣日粮和20%发酵剑麻渣日粮,预试期5 d,正试期30 d。结果表明:与对照组相比,饲喂20%发酵剑麻渣日粮能够提高新西兰兔的日采食量(86 g vs 74 g)、平均日增重(19 g vs 13 g)、胴体重(367 g vs 267 g)和屠宰率(33.33%vs 30.25%)(P<0.05);而10%发酵剑麻渣日粮组的各项指标与其他两组没有显著差异;耗料增重比、眼肌面积、肉色、肌肉嫩度和pH(pH_(45min)、pH_(24h))在三组间差异不显著。综上,在日粮中添加20%发酵剑麻渣能够显著提高家兔生长性能和屠宰性能,而对肉品质没有显著影响,发酵剑麻渣可作为饲养新西兰兔的饲料原料。展开更多
基金the National Natural Science Foundation of China(No.42176239)the Asian Countries Maritime Cooperation Fund(No.99950410)the Investigation and Evaluation of Microplastics in Seawater(No.ZY0722044)。
文摘Microplastics(<5 mm)are ubiquitous in the environment and can pose potential danger to the ecosystem and even human health.As the sink of microplastics,the ocean,especially the densely populated coastal area,has become a hotspot for research on microplastic pollution.In the last decade,the research of marine microplastics has been rapidly increasing in China.This review summarized the microplastic research conducted in China marine waters so far,and introduced the trends and progress of microplastic research in the four seas along the coast of China.We reviewed and compared the current sampling,extraction,and identification methodologies of China's microplastic research.According to the sampling method,the 30 reviewed studies were separated into two categories,trawl sampling and bulk sampling,to summarize relevant data,including abundance,sizes,shapes,colors and polymer types of microplastics.The main results showed that the distribution of microplastics in China's marine environment varied significantly,with offshore mariculture zones and the South China Sea being the most contaminated areas.Transparent,granules(or pellets)and fibers were the most dominant microplastic colors and shapes,and the size of microplastics was influenced significantly by the sampling method.Polyethylene(PE),polypropylene(PP)and polystyrene(PS)were the most common polymer types found in the China Sea,accounting for 49.96%,29.97%,and 12.38%of the total studies,respectively.Compared with other global data,China's coastal microplastic pollution is at an intermediate level and does not seem to be a major microplastic pollution source.
文摘试验旨在研究发酵剑麻渣日粮对新西兰大白兔生长性能、屠宰性能和肉品质的影响,为开发新饲料资源并降低剑麻产业下游污染提供参考。选择35日龄平均体重490 g的健康新西兰兔90只,公母各半,随机分成3组,每组15个重复,每个重复2只。3组分别饲喂基础日粮(对照组)、10%发酵剑麻渣日粮和20%发酵剑麻渣日粮,预试期5 d,正试期30 d。结果表明:与对照组相比,饲喂20%发酵剑麻渣日粮能够提高新西兰兔的日采食量(86 g vs 74 g)、平均日增重(19 g vs 13 g)、胴体重(367 g vs 267 g)和屠宰率(33.33%vs 30.25%)(P<0.05);而10%发酵剑麻渣日粮组的各项指标与其他两组没有显著差异;耗料增重比、眼肌面积、肉色、肌肉嫩度和pH(pH_(45min)、pH_(24h))在三组间差异不显著。综上,在日粮中添加20%发酵剑麻渣能够显著提高家兔生长性能和屠宰性能,而对肉品质没有显著影响,发酵剑麻渣可作为饲养新西兰兔的饲料原料。
