搜索结果: 1-15 共查到“理学 Crops”相关记录15条 . 查询时间(0.078 秒)
Research collaboration puts climate-resilient crops in sight（图）
气候 作物 植物生物学 机器学习 环境胁迫反应 遗传根源
2021/9/17
Any houseplant owner knows that changes in the amount of water or sunlight a plant receives can put it under immense stress. A dying plant brings certain disappointment to anyone with a green thumb.
Crops: Mixed cultures for a greater yield
mixed culture increase production ecosystem plant
2021/6/24
What holds true for meadows would seem to apply to arable land, too: mixed cultures are more fruitful than monocultures.
Green Algae Could Hold Clues For Engineering Faster-Growing Crops（图）
Green Algae Hold Clues Engineering Faster-Growing Crops
2017/9/21
Two new studies of green algae — the scourge of swimming pool owners and freshwater ponds — have revealed new insights into how these organisms siphon carbon dioxide from the air for use in photosynth...
该研究首先利用响应面法优化了HPLC-DPPH的条件，并在此条件下筛选出了黄花补血草中7种具有抗氧化作用的化合物。利用HPLC-MS技术鉴定出黄花补血草中具有抗氧化作用的化合物为杨梅酮-3-O-β-D-(6“-O-没食子酰基)-吡喃葡萄糖苷、杨梅素-3-O-葡萄糖苷、杨梅苷、圣草素-7-O-葡萄糖苷、杨梅酮、圣草素和高圣草素。
Managing soil nitrate with cover crops and buffer strips in Sicilian vineyards
Sicilian vineyards buffer strips
2015/1/5
When soil nitrate levels are low, plants suffer nitrogen (N) deficiency but when the levels are excessive, soil
nitrates can pollute surface and subsurface waters.
Molecular markers in the improvement of Allium crops
cytoplasmic male sterility diversity garlic onion quantitative trait loci simple sequence repeat
2013/2/24
The genus Allium (Family: Alliaceae) is the most important among the bulbous vegetable crops. characterization of Alliums based on phenotypic traits is influenced by the environment and leads to biase...
The drivers of tropical deforestation have shifted in the early 21st century to hinge on growth of cities and the globalized agricultural trade, a new large-scale study concludes. The observations sta...
MULTI-CRITERIA IRRIGATION PLANNING FOR DRY SEASON CROPS
artificial neural network back-propagation neural network genetic algorithms
2009/10/12
The geometry and modeling parameters of an artificial neural network (ANN) have significant effects on its predictive performance efficiency. The optimal geometry of an ANN is problem-dependent. Altho...
Warming Climate May Devastate Major U.S. Crops--Study Suggests Tipping Points for Corn, Soybeans, Cotton（图）
Warming Climate Major U.S. Crops Tipping Points Corn Soybeans Cotton
2009/9/11
Three of the most important crops produced in the United States—corn, soybeans and cotton—are predicted to suffer declines of as much as 80 percent if temperatures continue to rise with manmade climat...
Estimation of actual evapotranspiration of Mediterranean perennial crops by means of remote-sensing based surface energy balance models
evapotranspiration surface energy balance Mediterranean perennial crops
2009/7/22
Actual evapotranspiration from typical Mediterranean crops has been assessed in a Sicilian study area by using surface energy balance (SEB) and soil-water balance models. Both modelling approaches us...
An analytical solution for the estimation of the critical available soil water fraction for a single layer water balance model under growing crops
soil water single layer water balance model growing crops
2009/6/5
In the framework of simplified water balance models devoted to irrigation scheduling or crop modelling, the relative transpiration rate (the ratio of actual to maximal transpiration) is assumed to dec...
Eclipse effects on field crops and marine zooplankton: the 29 March 2006 total solar eclipse
Eclipse field crops marine zooplankt solar eclipse
2008/11/17
Some effects in the biosphere from the Total Solar Eclipse of 29 March 2006 were investigated in field crops and marine zooplankton. Taking into account the decisive role of light on plant life and pr...
HIDDEN MARKOV MODELS APPLIED IN AGRICULTURAL CROPS CLASSIFICATION
Crop Identification Hidden Markov Models Multitemporal Analysis Object-based Image Analysis
2008/11/16
This work proposes a Hidden Markov Model (HMM) based technique to classify agricultural crops, exploring information of
temporal image sequences from TM and ETM+
/Landsat sensors. It endeavours to ...
Food Safety Experts at American Association for the Advancement of Science Briefing Urge More Protection for Crops and Livestock（图）
entomology plant pathology
2007/5/8
3 May 2007，While the United States has vastly increased funding for homeland security and the military, two food safety experts warned that gaps remain in the nation’s ability to adequately protect it...
Evaluation of Fermentation Quality of a Tropical and Temperate Forage Crops Ensiled with Additives of Fermented Juice of Epiphytic Lactic Acid Bacteria (FJLB)
Tropical and Temperate Forage Crops Fjlb Additive Silage Fermentation
2004/4/15
This study aimed to examine the fermentation quality of a tropical Elephant grass (Pennisetum purpuereum) and temperate Italian ryegrass (Lolium multiflorum) forages ensiled additive of fermented juic...