Improving the yield of maize grain per unit area is needed to meet the growing demand for it in China, where the availability of fertile land is very limited.Modified fertilization management and planting density are ...Improving the yield of maize grain per unit area is needed to meet the growing demand for it in China, where the availability of fertile land is very limited.Modified fertilization management and planting density are efficient methods for increasing crop yield.Field experiments were designed to investigate the influence of modified fertilization management and planting density on grain yield and nitrogen use efficiency of the popular maize variety Zhengdan 958, in four treatments including local farmer＇s practice（FP）, high-yielding and high efficiency cultivation（HH）, super high-yielding cultivation（SH）, and the control（CK）.Trials were conducted in three locations of the Huang-Huai-Hai Plain in northern China.Compared with FP, SH was clearly able to promote N absorption and dry matter accumulation in post-anthesis, and achieve high yield and N use efficiency by increasing planting density and postponing the supplementary application of fertilizers.However, with an increase in planting density, the demand of N increased along with grain yield.Due to the input of too much N fertilizer, the efficiency of N use in SH was low.Applying less total N, ameliorating cultivation and cropping management practices should be considered as priority strategies to augment production potential and finally achieve synchronization between high yield and high N efficiency in fertile soils.However, in situations where soil fertility is low, achieving high yield and high N use efficiency in maize will likely depend on increased planting density and appropriate application of supplementary fertilizers postpone to the grain-filling stage.展开更多
目的研究度洛西汀在女性慢性盆腔痛治疗中的作用。方法选取金华市中心医院和金华市妇幼保健院2021年6月至2023年6月盆腔疼痛患者126例,随机分成对照组和观察组,剔除失访及未完成治疗12例,对照组56例,观察组58例,对照组给予盆底电刺激治...目的研究度洛西汀在女性慢性盆腔痛治疗中的作用。方法选取金华市中心医院和金华市妇幼保健院2021年6月至2023年6月盆腔疼痛患者126例,随机分成对照组和观察组,剔除失访及未完成治疗12例,对照组56例,观察组58例,对照组给予盆底电刺激治疗,观察组在对照组治疗基础上应用度洛西汀,两组均治疗3个月,治疗前后应用视觉模拟评分法(Visual analogue scale,VAS)、盆底功能障碍问卷简要版-20(Pelvic floor dysfunction inventory-20,PFDI-20)、盆底器官脱垂/尿失禁性生活问卷-12(Pelvic organ prolapse-urinary incontinence sexual function questionnaire-12,PISQ-12)、匹兹堡睡眠质量指数(Pittsburgh sleep quality index,PSQI)及医院焦虑抑郁量表(Hospital anxiety and depression scale,HAD)观察两组患者治疗前后病情的改善状况。结果治疗前两组VAS、PFDI-20、PISQ-12、PSQI、HAD评分比较,差异无统计学意义(P>0.05),治疗3个月分别对比VAS(观察组:1.20±0.16,对照组:1.51±0.20,P<0.05)、PFDI-20(观察组:5.69±5.4,对照组:8.95±4.27,P<0.05)、PISQ-12(观察组:40.79±3.11,对照组:30.86±5.88,P<0.05)、PSQI(观察组:7.79±1.39,对照组:10.59±1.95,P<0.05)及HAD(观察组:6.21±1.74,对照组:9.29±2.38,P<0.05),差异有统计学意义。结论度洛西汀在女性慢性盆腔痛治疗过程中有助于改善患者疼痛、焦虑、抑郁状态,提高患者生活及睡眠质量,对女性慢性盆腔痛有改善作用,同时对患者性生活质量也有明显改善作用。展开更多
基金supported by grants from the National Natural Science Foundation of China(31371576,31071358,31301274)the European Union’s Seventh Framework Programme(NUE-CROPS 222645)+1 种基金the National Key Technology Support Program of China(2011BAD16B14,2012BAD04B05-2)the Special Fund for Agro-Scientific Research in the Public Interest of China(HY12031100,HY1203096)
文摘Improving the yield of maize grain per unit area is needed to meet the growing demand for it in China, where the availability of fertile land is very limited.Modified fertilization management and planting density are efficient methods for increasing crop yield.Field experiments were designed to investigate the influence of modified fertilization management and planting density on grain yield and nitrogen use efficiency of the popular maize variety Zhengdan 958, in four treatments including local farmer＇s practice（FP）, high-yielding and high efficiency cultivation（HH）, super high-yielding cultivation（SH）, and the control（CK）.Trials were conducted in three locations of the Huang-Huai-Hai Plain in northern China.Compared with FP, SH was clearly able to promote N absorption and dry matter accumulation in post-anthesis, and achieve high yield and N use efficiency by increasing planting density and postponing the supplementary application of fertilizers.However, with an increase in planting density, the demand of N increased along with grain yield.Due to the input of too much N fertilizer, the efficiency of N use in SH was low.Applying less total N, ameliorating cultivation and cropping management practices should be considered as priority strategies to augment production potential and finally achieve synchronization between high yield and high N efficiency in fertile soils.However, in situations where soil fertility is low, achieving high yield and high N use efficiency in maize will likely depend on increased planting density and appropriate application of supplementary fertilizers postpone to the grain-filling stage.
文摘目的研究度洛西汀在女性慢性盆腔痛治疗中的作用。方法选取金华市中心医院和金华市妇幼保健院2021年6月至2023年6月盆腔疼痛患者126例,随机分成对照组和观察组,剔除失访及未完成治疗12例,对照组56例,观察组58例,对照组给予盆底电刺激治疗,观察组在对照组治疗基础上应用度洛西汀,两组均治疗3个月,治疗前后应用视觉模拟评分法(Visual analogue scale,VAS)、盆底功能障碍问卷简要版-20(Pelvic floor dysfunction inventory-20,PFDI-20)、盆底器官脱垂/尿失禁性生活问卷-12(Pelvic organ prolapse-urinary incontinence sexual function questionnaire-12,PISQ-12)、匹兹堡睡眠质量指数(Pittsburgh sleep quality index,PSQI)及医院焦虑抑郁量表(Hospital anxiety and depression scale,HAD)观察两组患者治疗前后病情的改善状况。结果治疗前两组VAS、PFDI-20、PISQ-12、PSQI、HAD评分比较,差异无统计学意义(P>0.05),治疗3个月分别对比VAS(观察组:1.20±0.16,对照组:1.51±0.20,P<0.05)、PFDI-20(观察组:5.69±5.4,对照组:8.95±4.27,P<0.05)、PISQ-12(观察组:40.79±3.11,对照组:30.86±5.88,P<0.05)、PSQI(观察组:7.79±1.39,对照组:10.59±1.95,P<0.05)及HAD(观察组:6.21±1.74,对照组:9.29±2.38,P<0.05),差异有统计学意义。结论度洛西汀在女性慢性盆腔痛治疗过程中有助于改善患者疼痛、焦虑、抑郁状态,提高患者生活及睡眠质量,对女性慢性盆腔痛有改善作用,同时对患者性生活质量也有明显改善作用。
