Results 61 to 70 of about 1,137 (145)

干旱内陆河灌区地下水位调控措施及其效应/Regulation measures of groundwater level and their effects in arid inland river irrigation regions[J]

, 2012
土壤次生盐渍化和土地荒漠化与灌区地下水位埋深密切相关。将灌区地下水调控在合理的埋深范围内,可更有效地防治土壤次生盐渍化,从而改善自然植被或作物赖以生存的土壤环境,更有利于自然植被或作物的生长发育,进而提高植被的繁茂程度或作物的产量。根据干旱内陆河流域水资源开发利用及农业生产管理的特点,总结并探讨了灌区地下水位调控的措施。以新疆阿瓦提灌区为例,依据生产实践设置了维持现状、加大灌区节水改造、改变洗盐压碱模式和优选井灌井排等4个情景方案,以现状数据为基础设置相应的参数,应用区域水盐平衡模型对灌区的水平衡 ...
努尔家依·热介夫, 包安明, 新疆农业大学草业与环境科学学院,乌鲁木齐,8300523, 新疆昌吉回族自治州环境监测站,新疆昌吉,831100, 荒漠与绿洲生态国家重点实验室,中国科学院新疆生态与地理研究所,乌鲁木齐830011, 郝丽娜, 钟瑞森   +6 more
core  

Ultra-flexible, transparent, adhesive, healable, freezing-tolerant and long-term stable cryogels for wearable sensors

Science China Materials, 2023
Shuo Liu, Xiansheng Zhang, Hongxing Xu, Mingwei Tian, Lijun Qu, Lili Wang   +5 more
semanticscholar   +1 more source

Water, Heat and Solute processes in Seasonally frozen Soils [Elektronisk resurs] : Experimental and Modeling Study

, 2015
Soil freezing and thawing is of importance in transport of water, heat and solute, which has coupled effects. Solute type and solute content in frozen soil could influence the osmotic potential of frozen soil and decrease freezing point, resulting in ...
Gustafsson, David,, Hansson, Klas,, Huang, Jiesheng,, Jansson, Per-Erik,, Jarvis, Nicholas,, Wu, Mousong,   +5 more
core  

Water, Heat and Solute processes in Seasonally frozen Soils : Experimental and Modeling Study

, 2015
Soil freezing and thawing is of importance in transport of water, heat and solute, which has coupled effects. Solute type and solute content in frozen soil could influence the osmotic potential of frozen soil and decrease freezing point, resulting in ...
Wu, Mousong
core  

Coupled processes in seasonally frozen soils [Elektronisk resurs] : Merging experiments and simulations

, 2016
Soil freezing/thawing is of importance in the transport of water, heat and solute, with coupled effects. Due to complexity in soil freezing/thawing, uncertainty could be influential in both experimentation and simulation work in frozen soils.
Jansson, Per-Erik,, Klove, Bjorn, Wu, Mousong,   +2 more
core  

川西亚高山针叶林主要树种云杉对季节性冻土期的生态生理响应

, 2014
季节性冻土是全球中高纬度和高海拔地区普遍存在的自然现象，大约60%的地球陆地表面遭受季节性雪被覆盖和季节性冻土。亚高山/高山地区的冬季(非生长季节)通常存在明显的初冬冻融、深冬冻结和早春冻融过程，但少有研究关注非生长季的这三个过程。另外，地下部分由于受冬季寒冷、雪被覆盖、土壤冻结以及采样观测困难等影响，已有的相关研究主要集中在地上部分，而对植物地下部分知之甚少。根系直接接触、响应土壤环境并调控地上生长，根系是环境胁迫的敏感探针，非生长季土壤冻融冻结状况下对根系进行监测更有助于了解该阶段生态过程 ...
肖群英
core  

冻融时期库布齐沙柳人工林土壤呼吸对降雪的响应

Shuitu Baochi Xuebao
[目的] 探究干旱半干旱地区春季冻融时期沙漠生态系统的土壤呼吸变化规律及其与环境因子的关系,为干旱半干旱地区沙地生态系统的碳收支提供数据支撑。[方法] 在内蒙古鄂尔多斯市达拉特旗沙柳林木种质资源库,以沙柳为研究对象,采用Li-6800土壤碳水通量测量室测定在无雪处理下,未整地未平茬(ww)、未整地平茬(wp)、整地未平茬(zw)、整地平茬(zp)的土壤呼吸速率,并同步测定大气温度和土壤温湿度。[结果] 冻融交替时期土壤呼吸的日变化规律呈单峰变化趋势,峰值出现在10:00—12:00 ...
王继璇, 兰小桢, 裴志永, 张钧尧, 王鑫平, 李颖, 王海超, 孙小添, 孙凯   +8 more
doaj  

[Ovarian tissue cryopreservation and transplantation: a review of clinical progress in fertility preservation]. [PDF]

Zhejiang Da Xue Xue Bao Yi Xue Ban
Chen J, Feng C, Jin M.
europepmc   +1 more source

1985—2021年青藏高原典型湖泊水文特征及关键影响因素

Shuitu Baochi Xuebao
[目的] 青藏高原的湖泊是气候变化的重要指示器,其扩张或缩减亦对青藏高原自然环境产生重要影响。[方法] 选取位于青藏高原不同气候子区的3个典型湖泊(青海湖、羊卓雍错、乌兰乌拉湖),采用遥感监测手段,研究3个典型湖泊1985—2021年水文特征的时空变化规律,揭示关键气候因子的作用,并进一步探讨冰川和冻土对典型湖泊的影响。[结果] 研究期间,青海湖的面积和水位呈显著上升趋势,面积增长238.68 km2,水位增长1.32 m,空间上则向东西方向扩张;羊卓雍错湖泊面积呈先波动上升后减少趋势 ...
张嘉琪, 张会兰, 刘雪妍
doaj  

[Application of assisted reproductive technology in fertility enhancement and preservation for women with malignant tumors]. [PDF]

Zhejiang Da Xue Xue Bao Yi Xue Ban
Ma C, Hu X, Zhang S, Xing L, Zhang Y, Zhu Y.   +5 more
europepmc   +1 more source