Coated controlled-release fertilizers （CRFs） have been widely applied in agriculture due to their increased efficiency. However, the widespread and a lot of coated CRFs application may leave undesired coating residu...Coated controlled-release fertilizers （CRFs） have been widely applied in agriculture due to their increased efficiency. However, the widespread and a lot of coated CRFs application may leave undesired coating residues in the soil due to their slow degradation. Limited information is available on the effects of substantial residual coatings on the soil bacterial community. By adding 0, 5, 10, 20, and 50 times quantities of residual coating from conventional application amount of resin and water-soluble coated CRFs, we studied the responses of soil properties and bacterial community composition to these two residual coatings in black soil. The results showed that the resin and water-soluble coatings did not essentially alter the properties of black soil or cause dramatic changes to bacterial diversity within the test concentration range. The residual resin and water-soluble coatings also did not distinctly alter the relative abundance of the top ten bacteria at phylum level. Heatmap results suggested that the treatments were basically clustered into two groups by concentration rather than types of coating material. Pearson correlation analysis showed that the Simpson＇s diversity index of the bacterial community was significantly correlated with microbial biomass carbon （MBC, r=0.394, P〈0.05）, and the richness index abundance-based coverage estimator （ACE） of the bacterial community was significantly correlated with microbial biomass nitrogen （MBN, t=0.407, P〈0.05）. Overall, results of this study suggested that substantial residual resin and water-soluble coatings with 0-50 times quantities of residual coating from conventional application amount of coated CRFs did not generate obviously negative impacts on the bacterial community in black soil.展开更多
目的:通过Meta分析评价Dynesys与后路减压融合内固定术治疗腰椎退行性疾病的有效性与安全性。方法:计算机检索Cochrane图书馆、Medline、Embase、CNKI、万方数据库和中国生物医学文献数据库,手工检索相关文献的参考文献及主要中英文骨...目的:通过Meta分析评价Dynesys与后路减压融合内固定术治疗腰椎退行性疾病的有效性与安全性。方法:计算机检索Cochrane图书馆、Medline、Embase、CNKI、万方数据库和中国生物医学文献数据库,手工检索相关文献的参考文献及主要中英文骨科杂志。收集所有比较Dynesys和后路减压融合内固定术临床疗效与安全性的中、英文前瞻性或回顾性对照研究,评价纳入研究的方法学质量并提取资料,采用Cochrane协作网提供的Rev Man 5.2软件进行系统评价。结果:共纳入9项临床研究,其中3个前瞻性随机对照研究,6个回顾性对照观察研究。共692例患者,其中Dynesys组336例,后路减压融合内固定术组356例。Meta分析结果显示:与后路减压融合内固定术相比,Dynesys显著缩短了手术时间(P<0.01)、减少了术中出血量(P<0.01);与术前相比,在末次随访时二者均显著改善了患者ODI评分及腰腿痛VAS评分,差异无统计学意义(P>0.05);Dynesys有效保留了固定节段部分活动度,但后路减压融合内固定术组患者邻近节段活动度的增加大于Dynesys组(P<0.01);二者对于固定节段椎间高度的改善差异无统计学意义(P>0.05),但后路减压融合内固定术具有较高的术后并发症发生率(P<0.05)。结论:Dynesys和后路减压融合内固定术均是治疗腰椎退行性疾病的有效方式。与后路减压融合内固定术相比,Dynesys可以保留固定节段部分活动度,邻近节段活动度增幅及术后并发症发生率均较低,但其对于邻近节段退变的预防需要更多长期随访的前瞻性临床随机对照试验加以验证。展开更多
基金supported by the International Scientific and Technological Cooperation Projects of China (2015DFA20790)the National Natural Science Foundation of China (21577172,41501322)the National Basic Research Program (973 program) of China (2013CB127406)
文摘Coated controlled-release fertilizers （CRFs） have been widely applied in agriculture due to their increased efficiency. However, the widespread and a lot of coated CRFs application may leave undesired coating residues in the soil due to their slow degradation. Limited information is available on the effects of substantial residual coatings on the soil bacterial community. By adding 0, 5, 10, 20, and 50 times quantities of residual coating from conventional application amount of resin and water-soluble coated CRFs, we studied the responses of soil properties and bacterial community composition to these two residual coatings in black soil. The results showed that the resin and water-soluble coatings did not essentially alter the properties of black soil or cause dramatic changes to bacterial diversity within the test concentration range. The residual resin and water-soluble coatings also did not distinctly alter the relative abundance of the top ten bacteria at phylum level. Heatmap results suggested that the treatments were basically clustered into two groups by concentration rather than types of coating material. Pearson correlation analysis showed that the Simpson＇s diversity index of the bacterial community was significantly correlated with microbial biomass carbon （MBC, r=0.394, P〈0.05）, and the richness index abundance-based coverage estimator （ACE） of the bacterial community was significantly correlated with microbial biomass nitrogen （MBN, t=0.407, P〈0.05）. Overall, results of this study suggested that substantial residual resin and water-soluble coatings with 0-50 times quantities of residual coating from conventional application amount of coated CRFs did not generate obviously negative impacts on the bacterial community in black soil.
文摘目的:通过Meta分析评价Dynesys与后路减压融合内固定术治疗腰椎退行性疾病的有效性与安全性。方法:计算机检索Cochrane图书馆、Medline、Embase、CNKI、万方数据库和中国生物医学文献数据库,手工检索相关文献的参考文献及主要中英文骨科杂志。收集所有比较Dynesys和后路减压融合内固定术临床疗效与安全性的中、英文前瞻性或回顾性对照研究,评价纳入研究的方法学质量并提取资料,采用Cochrane协作网提供的Rev Man 5.2软件进行系统评价。结果:共纳入9项临床研究,其中3个前瞻性随机对照研究,6个回顾性对照观察研究。共692例患者,其中Dynesys组336例,后路减压融合内固定术组356例。Meta分析结果显示:与后路减压融合内固定术相比,Dynesys显著缩短了手术时间(P<0.01)、减少了术中出血量(P<0.01);与术前相比,在末次随访时二者均显著改善了患者ODI评分及腰腿痛VAS评分,差异无统计学意义(P>0.05);Dynesys有效保留了固定节段部分活动度,但后路减压融合内固定术组患者邻近节段活动度的增加大于Dynesys组(P<0.01);二者对于固定节段椎间高度的改善差异无统计学意义(P>0.05),但后路减压融合内固定术具有较高的术后并发症发生率(P<0.05)。结论:Dynesys和后路减压融合内固定术均是治疗腰椎退行性疾病的有效方式。与后路减压融合内固定术相比,Dynesys可以保留固定节段部分活动度,邻近节段活动度增幅及术后并发症发生率均较低,但其对于邻近节段退变的预防需要更多长期随访的前瞻性临床随机对照试验加以验证。
