利用2013、2016、2019、2023年对橡胶种植户调查的数据,分析农户胶园结构以及割胶生产、胶园管理等方面的行为变化,结果发现:胶园树龄结构逐渐进入老龄化,自主选育品种的面积占比逐步提高,海南民营胶园10年间每公顷有效株数减少48株;橡...利用2013、2016、2019、2023年对橡胶种植户调查的数据,分析农户胶园结构以及割胶生产、胶园管理等方面的行为变化,结果发现:胶园树龄结构逐渐进入老龄化,自主选育品种的面积占比逐步提高,海南民营胶园10年间每公顷有效株数减少48株;橡胶园流转频率低、面积小,2022年正常割胶的农户比重较2018年有所提高,2 d 1刀仍是海南民营胶园和西双版纳胶园的最重要割制,但西双版纳地区2022年采用3 d 1刀的农户比重较2018年增加25个百分点;2018年和2022年有施肥的农户比重较2012年明显下降,其中西双版纳2018年和2022年有施肥农户占比不足2012年的一半,但胶农都重视胶园杂草管理。展开更多
Objectives To determine the safety and value of esophageal radiography as a means of locating transseptal puncture. Methods 486 patients who underwent transseptal puncture were randomized into two groups. An esophagus...Objectives To determine the safety and value of esophageal radiography as a means of locating transseptal puncture. Methods 486 patients who underwent transseptal puncture were randomized into two groups. An esophagus radiographic method of locating tansseptal puncture site was applied in the study group （n = 243 ） and modified-Ross locating method was used in the control group （n = 243 ）. After successful location, transseptal puncture was made. We observed the success rate and incidence complications in the 2 groups. Results Left atrium impression in the study group was clearly seen. Nonetheless in 120 cases of control group, the left atria silhouette was not clearly visualised. The success rate of locating transseptal puncture site in the study group and control group were 100% and 50. 6% respectively （ P 〈 0. 001 ）. The success rate of transseptal puncture in the study group and control group was 99. 6% and 45.7% respectively （ P 〈 0. 001 ）. There were no complications associated with puncture in the study group and pericardial tamponade occurred in 1 control patient. Conclusions The esophagus radiographic method of locating transseptal puncture site is accurate, safe and simple to perform. Transseptal puncture has a high success rate with few complications.展开更多
文摘利用2013、2016、2019、2023年对橡胶种植户调查的数据,分析农户胶园结构以及割胶生产、胶园管理等方面的行为变化,结果发现:胶园树龄结构逐渐进入老龄化,自主选育品种的面积占比逐步提高,海南民营胶园10年间每公顷有效株数减少48株;橡胶园流转频率低、面积小,2022年正常割胶的农户比重较2018年有所提高,2 d 1刀仍是海南民营胶园和西双版纳胶园的最重要割制,但西双版纳地区2022年采用3 d 1刀的农户比重较2018年增加25个百分点;2018年和2022年有施肥的农户比重较2012年明显下降,其中西双版纳2018年和2022年有施肥农户占比不足2012年的一半,但胶农都重视胶园杂草管理。
文摘Objectives To determine the safety and value of esophageal radiography as a means of locating transseptal puncture. Methods 486 patients who underwent transseptal puncture were randomized into two groups. An esophagus radiographic method of locating tansseptal puncture site was applied in the study group （n = 243 ） and modified-Ross locating method was used in the control group （n = 243 ）. After successful location, transseptal puncture was made. We observed the success rate and incidence complications in the 2 groups. Results Left atrium impression in the study group was clearly seen. Nonetheless in 120 cases of control group, the left atria silhouette was not clearly visualised. The success rate of locating transseptal puncture site in the study group and control group were 100% and 50. 6% respectively （ P 〈 0. 001 ）. The success rate of transseptal puncture in the study group and control group was 99. 6% and 45.7% respectively （ P 〈 0. 001 ）. There were no complications associated with puncture in the study group and pericardial tamponade occurred in 1 control patient. Conclusions The esophagus radiographic method of locating transseptal puncture site is accurate, safe and simple to perform. Transseptal puncture has a high success rate with few complications.
