نتایج جستجو برای: precipitation deficit

تعداد نتایج: 122121  

2012
ADRIEN C. FINZI

Nitrogen regulates the Earth’s climate system by constraining the terrestrial sink for atmospheric CO2. Proteolytic enzymes are a principal driver of the within-system cycle of soil nitrogen, yet there is little to no understanding of their response to climate change. Here, we use a single methodology to investigate potential proteolytic enzyme activity in soils from 16 global change experiment...

2016
Lijie Qin Yinghua Jin Peili Duan Hongshi He

BACKGROUND Field-scale changes in the water footprint during crop growth play an important role in formulating sustainable water utilisation strategies. This study aimed to explore field-scale variation in the water footprint of growing sunflowers in the western Jilin Province, China, during a 3-year field experiment. The goals of this study were to (1) determine the components of the 'blue' an...

2009
Shih-Chieh Kao Rao S. Govindaraju

In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: s u m m a r y Current drought information is based on indices that do not capture the joint behaviors of hydrologic variable...

2017
Shoudong Zhao Yuan Jiang Manyu Dong Hui Xu Neil Pederson

The response of tree growth to climate can vary over time and geographical space. This study aims to evaluate and compare the climatic drivers of Qinghai spruce (Picea crassifolia Kom.), a species endemic to northwest China, over an elevational gradient, from its lower distributional margin to its upper distributional margin. We sampled pure Qinghai spruce stands and obtained time-series of gro...

Journal: :IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 2022

Satellite-based soil moisture products allow direct monitoring of agricultural drought, especially in regions with sparse ground-based observations. In this study, a drought index only based on satellite is developed and adopted to assess Mainland Southeast Asia. We report here an exceptionally severe Asia 2016, which believed be strongly linked the 2015-2016 super El Niño strongly. The ...

2016
Yuanxin Liu Wenwu Zhao Lixin Wang Xiao Zhang Stefani Daryanto Xuening Fang Eric J. Jokela

Soil moisture scarcity has become the major limiting factor of vegetation restoration in the Loess Plateau of China. The aim of this study is: (i) to compare the spatial distribution of deep (up to 5 m) soil moisture content (SMC) beneath the introduced shrub Caragana korshinskii Kom. under different precipitation zones in the Loess Plateau and (ii) to investigate the impacts of environmental f...

2015
Xiliang Song Guangsheng Zhou Zhenzhu Xu Xiaomin Lv Yuhui Wang

In this study, the impact of future climate change on photosynthetic efficiency as well as energy partitioning in the Stipa bungeana was investigated by using chlorophyll fluorescence imaging (CFI) technique. Two thermal regimes (room temperature, T0: 23.0/17.0°C; High temperature, T6: 29.0/23.0°C) and three water conditions (Control, W0; Water deficit, W-30; excess precipitation, W+30) were se...

2016
M. D. Petrie N. A. Brunsell R. Vargas S. L. Collins L. B. Flanagan N. P. Hanan M. E. Litvak A. E. Suyker

In the Great Plains, grassland carbon dynamics differ across broad gradients of precipitation and temperature, yet finer-scale variation in these variables may also affect grassland processes. Despite the importance of grasslands, there is little information on how fine-scale relationships compare between them regionally. We compared grassland C exchanges, energy partitioning and precipitation ...

Journal: :iran agricultural research 2015
mohammad mehdi moghimi alireza sepaskhah ali akbar kamgar-haghighi

addressing deficit irrigation scheduling (dis) for strategic crop production (especially wheat) under precipitation uncertainty is a priority for irrigation scheduling in drought conditions. this research investigated the precipitation uncertainty by enacting optimistic and pessimistic scenarios for the next 20 years by considering the statistical record of climate in badjgah area. dis was cond...

Addressing deficit irrigation scheduling (DIS) for strategic crop production (especially wheat) under precipitation uncertainty is a priority for irrigation scheduling in drought conditions. This research investigated the precipitation uncertainty by enacting optimistic and pessimistic scenarios for the next 20 years by considering the statistical record of climate in Badjgah area. DIS was cond...

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