Increasing attentions have been paid to mineral concentration decrease in milled rice grains caused by CO2 enrichment, but the mechanisms still remain unclear. Therefore, mineral （Ca, Mg, Fe, Zn and Mn） translocatio...Increasing attentions have been paid to mineral concentration decrease in milled rice grains caused by CO2 enrichment, but the mechanisms still remain unclear. Therefore, mineral （Ca, Mg, Fe, Zn and Mn） translocation in plant-soil system with a FACE （Free-air CO2 enrichment） experiment were investigated in Eastern China after 4-yr operation. Results mainly showed that： （1） elevated CO2 significantly increased the biomass of stem and panicle by 21.9 and 24.0%, respectively, but did not affect the leaf biomass. （2） Elevated CO2 significantly increased the contents of Ca, Mg, Fe, Zn, and Mn in panicle by 61.2, 28.9, 87.0, 36.7, and 66.0%, respectively, and in stem by 13.2, 21.3, 47.2, 91.8, and 25.2%, respectively, but did not affect them in leaf. （3） Elevated CO2 had positive effects on the weight ratio of mineral/biomass in stem and panicle. Our results suggest that elevated CO2 can favor the translocation of Ca, Mg, Fe, Zn, and Mn from soil to stem and panicle. The CO2-led mineral decline in milled rice grains may mainly attribute to the CO2-1ed unbalanced stimulations on the translocations of minerals and carbohydrates from vegetative parts （e.g., leaf, stem, branch and husk） to the grains.展开更多
基金supported by the National Natural Science Foundation of China (31200369)the Lecture and Study for Outstanding Scholars from Home and Abroad,Chinese Academy of Forestry (CAF),2014
文摘Increasing attentions have been paid to mineral concentration decrease in milled rice grains caused by CO2 enrichment, but the mechanisms still remain unclear. Therefore, mineral （Ca, Mg, Fe, Zn and Mn） translocation in plant-soil system with a FACE （Free-air CO2 enrichment） experiment were investigated in Eastern China after 4-yr operation. Results mainly showed that： （1） elevated CO2 significantly increased the biomass of stem and panicle by 21.9 and 24.0%, respectively, but did not affect the leaf biomass. （2） Elevated CO2 significantly increased the contents of Ca, Mg, Fe, Zn, and Mn in panicle by 61.2, 28.9, 87.0, 36.7, and 66.0%, respectively, and in stem by 13.2, 21.3, 47.2, 91.8, and 25.2%, respectively, but did not affect them in leaf. （3） Elevated CO2 had positive effects on the weight ratio of mineral/biomass in stem and panicle. Our results suggest that elevated CO2 can favor the translocation of Ca, Mg, Fe, Zn, and Mn from soil to stem and panicle. The CO2-led mineral decline in milled rice grains may mainly attribute to the CO2-1ed unbalanced stimulations on the translocations of minerals and carbohydrates from vegetative parts （e.g., leaf, stem, branch and husk） to the grains.
文摘目的通过分析肠内营养治疗联合营养会诊是否可以降低住院费用和术后并发症,验证“无饿医院”建设对营养不良患者临床获益的效果。方法选择2018年1月至2019年8月首都医科大学附属北京世纪坛医院纳入疾病诊断相关分组(disease diagnosis related group,DRG)-GB23的出院病例共239例。按照肠内营养联合营养会诊、单纯肠内营养治疗和无肠内营养治疗,将患者分为联合组(21例)、单纯组(38例)、对照组(180例),分析营养治疗对医疗费用、并发症发生率及住院时间的影响。结果单纯组的住院费用为(107279.71±48735.205)元,较对照组减少13.41%,联合组为(88255.95±24412.532)元,较单纯组减少17.73%,三组间差异有统计学意义(F=6.711,P=0.013),单纯肠内营养治疗可降低住院费用15793元,肠内营养治疗联合营养会诊可降低住院费用33631元(F=6.141,P=0.003)。三组患者术后并发症发生率差异有统计学意义(χ2=40.489,P<0.001),单纯肠内营养治疗可将术后并发症的风险降低75%(OR=0.25),肠内营养治疗联合营养会诊可将并发症的风险降低96%(OR=0.04)。三组患者平均住院时间差异无统计学意义(F=2.024,P=0.134)。结论营养会诊及规范的营养治疗对于降低医疗费用、减少并发症发生率起到重要作用,营养不良患者可从“无饿医院”管理模式中获益。
