Background Water deficit is an important problem in agricultural production in arid regions.With the advent of wholly mechanized technology for cotton planting in Xinjiang,it is important to determine which planting m...Background Water deficit is an important problem in agricultural production in arid regions.With the advent of wholly mechanized technology for cotton planting in Xinjiang,it is important to determine which planting mode could achieve high yield,fiber quality and water use efficiency(WUE).This study aimed to explore if chemical topping affected cotton yield,quality and water use in relation to row configuration and plant densities.Results Experiments were carried out in Xinjiang China,in 2020 and 2021 with two topping method,manual topping and chemical topping,two plant densities,low and high,and two row configurations,i.e.,76 cm equal rows and 10+66 cm narrow-wide rows,which were commonly applied in matching harvest machine.Chemical topping increased seed cotton yield,but did not affect cotton fiber quality comparing to traditional manual topping.Under equal row spacing,the WUE in higher density was 62.4%higher than in the lower one.However,under narrow-wide row spacing,the WUE in lower density was 53.3%higher than in higher one(farmers’practice).For machine-harvest cotton in Xinjiang,the optimal row configuration and plant density for chemical topping was narrow-wide rows with 15 plants m-2 or equal rows with 18 plants m-2.Conclusion The plant density recommended in narrow-wide rows was less than farmers’practice and the density in equal rows was moderate with local practice.Our results provide new knowledge on optimizing agronomic managements of machine-harvested cotton for both high yield and water efficient.展开更多
文摘目的比较胆囊结石合并胆总管结石患者采用腹腔镜下胆囊切除(laparoscopic cholecystectomy,LC)序贯内镜逆行胰胆管造影(endoscopic retrograde cholangiopancreatography,ERCP)与腹腔镜下胆囊切除合经胆总管胆道探查术(laparoscopic cholecystectomy combine with common bile duct exploration,LCBDE)+LC胆总管一期缝合治疗的临床效果。方法回顾性选取2019年1月—2020年12月扬州大学附属苏北人民医院肝胆胰外科中心收治的208例胆囊结石合并胆总管结石患者的临床资料,根据手术方式不同,分为LC序贯ERCP组和LCBDE+LC组,对比两组的围手术期指标(术中出血量、手术时间、术后拔管时间、术后进食时间)、术后近期并发症(胆漏、胰腺炎、高淀粉酶血症、胆管炎、消化道出血)和远期并发症(胆总管结石复发、胆总管狭窄)及术后6个月胆总管结石残留情况、肝功能指标。结果两组术中出血量、术后进食时间比较,差异无统计学意义(P均>0.05);LC序贯ERCP组手术时间长于LCBDE+LC组,住院费用高于LCBDE+LC组,术后拔管时间和住院时间短于LCBDE+LC组,差异有统计学意义(P均<0.05)。LC序贯ERCP组术后胆管炎发生率高于LCBDE+LC组,差异有统计学意义(P<0.05)。术后,LCBDE+LC组血清总胆红素>23.5μmol/L、丙氨酸氨基转移酶>50 U/L、白细胞计数>9.5×109/L的患者占比低于LC序贯ERCP组,差异有统计学意义(P均<0.05)。LC序贯ERCP组术后高淀粉酶血症及胰腺炎发生率为18.00%(18/100),高于LCBDE+LC组的0,术后胆漏发生率为0,低于LCBDE+LC组的11.11%(12/108),差异有统计学意义(χ^(2)=21.282、11.791,P均<0.05)。结论LC序贯ERCP组住院时间及术后恢复时间相对较短,LCBDE+LC胆总管一期缝合总体并发症的发生更少,术后肝功能恢复快,总体花费低,两组患者疗效和安全性均可靠。
基金Key Research and Development Program of Xinjiang(2022B02001-1)National Natural Science Foundation of China(42105172,41975146).
文摘Background Water deficit is an important problem in agricultural production in arid regions.With the advent of wholly mechanized technology for cotton planting in Xinjiang,it is important to determine which planting mode could achieve high yield,fiber quality and water use efficiency(WUE).This study aimed to explore if chemical topping affected cotton yield,quality and water use in relation to row configuration and plant densities.Results Experiments were carried out in Xinjiang China,in 2020 and 2021 with two topping method,manual topping and chemical topping,two plant densities,low and high,and two row configurations,i.e.,76 cm equal rows and 10+66 cm narrow-wide rows,which were commonly applied in matching harvest machine.Chemical topping increased seed cotton yield,but did not affect cotton fiber quality comparing to traditional manual topping.Under equal row spacing,the WUE in higher density was 62.4%higher than in the lower one.However,under narrow-wide row spacing,the WUE in lower density was 53.3%higher than in higher one(farmers’practice).For machine-harvest cotton in Xinjiang,the optimal row configuration and plant density for chemical topping was narrow-wide rows with 15 plants m-2 or equal rows with 18 plants m-2.Conclusion The plant density recommended in narrow-wide rows was less than farmers’practice and the density in equal rows was moderate with local practice.Our results provide new knowledge on optimizing agronomic managements of machine-harvested cotton for both high yield and water efficient.
