Phosphorus (P) fertilization is frequently needed for profitable crop production. Modified Morgan P (MMP) is a soil test P used to estimate plant available P in soils. The critical values of MMP for P fertilization an...Phosphorus (P) fertilization is frequently needed for profitable crop production. Modified Morgan P (MMP) is a soil test P used to estimate plant available P in soils. The critical values of MMP for P fertilization and maintenance recommendations are based on the P concentrations measured by a common colorimetric molybdenum blue method although other P quantification methods have also been used for MMP measurements. In this study, we collected 120 surface soil samples of Caribou Sandy loam under potato cultivation or its rotation crops from Maine, USA, and 72 soil samples of Cecil sandy loam with cotton/corn crops under conventional tillage and no-till management with chemical and poultry litter fertilization in Georgia, USA. The MMP levels in all 192 dry samples were greater when they were measured by an inductively coupled plasma (ICP)-based method, compared to the corresponding data produced from colorimetry. Our results show the two sets of data were positively and significantly correlated (r = 0.93, P –1 with standard deviation of 12.9, compared to the average of colorimetric MMP level of 14.9 mg P kg–1 with standard deviation of 8.8. Based on the observations in this work, both colorimetric and ICP-based methods can be used for P fertilizer recommendation, but a conversion factor should be applied for ICP data as the current recommendation systems are based on colorimetric M&R data.展开更多
目的探究不同手术方式对重度痔患者术后并发症及排便功能的影响。方法选取2011年1月至2013年12月来我院就诊的重度痔患者216例,随机分为治疗组和对照组,每组108例。治疗组予以吻合器痔上粘膜环切术(proceduce for prolapse and hemorrho...目的探究不同手术方式对重度痔患者术后并发症及排便功能的影响。方法选取2011年1月至2013年12月来我院就诊的重度痔患者216例,随机分为治疗组和对照组,每组108例。治疗组予以吻合器痔上粘膜环切术(proceduce for prolapse and hemorrhoids,PPH)进行治疗,对照组予以常规外剥内扎法进行治疗。结果治疗组患者手术时间(31.54±8.34)min,术中出血量(23.14±8.24)ml,创口愈合时间(10.64±3.76)d,术后仅1例(0.93%)发生切口感染,均明显优于对照组,对照组的手术时间为(47.22±11.05)min,术中出血量(38.17±13.52)ml,创口愈合时间(21.80±3.95)d,术后24 h尿潴留率5.56%(6/108)、排便困难发生率3.70%(4/108)及切口感染率6.48%(7/108)(P<0.05);治疗组的总有效率明显高于对照组(P<0.05)。结论 PPH治疗重度痔效果明显优于常规外剥内扎治疗法,可明显降低患者术后并发症及排便困难的发生。展开更多
文摘Phosphorus (P) fertilization is frequently needed for profitable crop production. Modified Morgan P (MMP) is a soil test P used to estimate plant available P in soils. The critical values of MMP for P fertilization and maintenance recommendations are based on the P concentrations measured by a common colorimetric molybdenum blue method although other P quantification methods have also been used for MMP measurements. In this study, we collected 120 surface soil samples of Caribou Sandy loam under potato cultivation or its rotation crops from Maine, USA, and 72 soil samples of Cecil sandy loam with cotton/corn crops under conventional tillage and no-till management with chemical and poultry litter fertilization in Georgia, USA. The MMP levels in all 192 dry samples were greater when they were measured by an inductively coupled plasma (ICP)-based method, compared to the corresponding data produced from colorimetry. Our results show the two sets of data were positively and significantly correlated (r = 0.93, P –1 with standard deviation of 12.9, compared to the average of colorimetric MMP level of 14.9 mg P kg–1 with standard deviation of 8.8. Based on the observations in this work, both colorimetric and ICP-based methods can be used for P fertilizer recommendation, but a conversion factor should be applied for ICP data as the current recommendation systems are based on colorimetric M&R data.
文摘目的探究不同手术方式对重度痔患者术后并发症及排便功能的影响。方法选取2011年1月至2013年12月来我院就诊的重度痔患者216例,随机分为治疗组和对照组,每组108例。治疗组予以吻合器痔上粘膜环切术(proceduce for prolapse and hemorrhoids,PPH)进行治疗,对照组予以常规外剥内扎法进行治疗。结果治疗组患者手术时间(31.54±8.34)min,术中出血量(23.14±8.24)ml,创口愈合时间(10.64±3.76)d,术后仅1例(0.93%)发生切口感染,均明显优于对照组,对照组的手术时间为(47.22±11.05)min,术中出血量(38.17±13.52)ml,创口愈合时间(21.80±3.95)d,术后24 h尿潴留率5.56%(6/108)、排便困难发生率3.70%(4/108)及切口感染率6.48%(7/108)(P<0.05);治疗组的总有效率明显高于对照组(P<0.05)。结论 PPH治疗重度痔效果明显优于常规外剥内扎治疗法,可明显降低患者术后并发症及排便困难的发生。
