Results 71 to 80 of about 85,362 (203)
The underappreciated roles of fog and dew on vegetation and biocrusts
New Phytologist, EarlyView.Summary Fog and dew represent minor components of ecosystem water budgets in most ecosystems. However, fog and dew can play an essential role in ecosystem dynamics and are particularly important for water‐limited systems. In addition to serving as direct water inputs, fog and dew can influence microclimate and water redistribution, thereby promoting ...
Lixin Wang, Yue Li, Mengyun Sun, Na Qiao
wiley +1 more source
Shuitu Baochi Xuebao, 2019 以极端干旱区胡杨林为研究对象，探究不同水分条件下胡杨林土壤水分运动规律和胡杨生态耗水特征。结果表明：HYDRUS-1D模型对极端干旱区胡杨林土壤水分运动和蒸散发过程具有良好的模拟效果。不同水分条件下胡杨林土壤水分运动特征和生态耗水变化差异明显。随着下垫面水分条件趋于湿润，土壤水分含量和湿润锋入渗深度均出现增加，入渗深度分别达到100，120，150 cm。下垫面水分条件改变导致土壤水分存蓄情况发生变化。下垫面水分补给增加的同时胡杨林蒸散发呈明显增加，其中植被蒸腾增加显著 ...
张瑞文 +4 more
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ドジョウ スイブン カクサン ケイスウ ソクテイホウ ノ ケントウ [PDF]
, 1990 【はじめに】降雨や灌漑，土壌表面からの蒸発，植物根による吸水などによって引き起こされる土壌水の移動は，湛水下の水田作土や地下水面下などの特殊な場合を除けば，ほとんどが不飽和の土壌中で生じている.こうした不飽和土壊中での水の流れを解析するには，土嬢の透水係数あるいは水分拡散係数を知ることが不可欠である.よく知られているように飽和土壌中で、の透水係数は一定値をとり，測定は容易である.これに対して不飽和土嬢中での透水係数や水分拡散係数は，水分量変化に伴って数オーダー以上の範囲で変化するため測定は図難であり ...
? 中有 +4 more
core +1 more source
New Phytologist, EarlyView.Network of VAMP714‐dependent interactions during salt stress. Summary Plant responses to salt stress include an altered root architecture mediated by ion imbalances, reactive oxygen species (ROS) accumulation, and altered hormonal responses. Auxin is implicated in these processes.
Jialei Sun +3 more
wiley +1 more source
Policy Studies Journal, EarlyView.Abstract Studies of lobbying typically look at the extent to which interest groups realize political goals on issues they actively lobby for. Little is known, however, about the extent to which interest groups attain their political goals without making an active lobbying effort.
Marcel Hanegraaff +2 more
wiley +1 more source
, 2014 Retrogressive sliding can be observed in groundwater-induced landslides. The major inducing factor of this phenomenon is the fluidization in the down-hillslope and the soil of the bottom-layers.
Chun-Hung Wu +5 more
core
Policy Studies Journal, EarlyView.ABSTRACT The social construction of target populations (SCTP) framework emphasizes the ways in which target populations' levels of political power and deservingness shape the allocation of policy benefits, but less attention has been devoted to the conditions under which the same target population may be considered deserving in one policy context but ...
Elizabeth Bell +3 more
wiley +1 more source
Shuitu Baochi Xuebao, 2019 为探究不同土壤容重和不同程度水分亏缺条件下冬小麦-夏玉米生长指标及产量的变化。采用桶栽土培法，分别设置3种土壤容重（1.2，1.4，1.6 g/cm3）和3个土壤水分控制下限（低水分50%田间持水量、中水分60%田间持水量和高水分70%田间持水量），研究不同土壤容重和水分亏缺对冬小麦-夏玉米根系、生长指标、耗水量、产量和水分利用的影响。结果表明：随水分亏缺程度的加剧，冬小麦和夏玉米生长指标、生物量、耗水量和产量均呈降低趋势。随土壤容重增加，冬小麦生物量和产量呈先升高再降低的趋势 ...
刘战东 +10 more
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Shuitu Baochi Xuebao, 2020 以北京地区3年生侧柏幼树为研究对象，采用温室内盆栽试验，设置5个不同土壤含水量水平，采用15N同位素自然丰度法研究不同水分条件下侧柏幼苗的生理活动、生物量分配及氮素吸收和分配情况。结果表明：（1）在水分胁迫下，侧柏单株净光合速率、呼吸速率、蒸腾速率均表现为最低值，随着干旱胁迫解除，含水量增加到正常值，各指标分别增加为原来的4.86，3.74，7.29倍，叶片含水量和叶面积分别增加了24.37％，23.69%；之后当土壤含水量超过正常值时，随着土壤水分含量的进一步增加，各指标略有下降。（2）在水分胁迫下 ...
王鑫 +5 more
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