Influence of Microgravity Environment on Root Growth, Soluble Sugars, and Starch Concentration of Sweetpotato Stem Cuttings [0.03%]
微重力环境对甘薯茎段扦插苗根系生长、可溶性糖和淀粉含量的影响
Desmond G Mortley,Conrad K Bonsi,Walter A Hill et al.
Desmond G Mortley et al.
Because sweetpotato [Ipomoea batatas (L.) Lam.] stem cuttings regenerate very easily and quickly, a study of their early growth and development in microgravity could be useful to an understanding of morphological changes that might occur un...
Physical and hydraulic properties of baked ceramic aggregates used for plant growth medium [0.03%]
用于植物生长介质的烧结陶瓷颗粒的物理和水力特性研究
Susan L Steinberg,Gerard J Kluitenberg,Scott B Jones et al.
Susan L Steinberg et al.
Baked ceramic aggregates (fritted clay, arcillite) have been used for plant research both on the ground and in microgravity. Optimal control of water and air within the root zone in any gravity environment depends on physical and hydraulic ...
Influence of nitrogen nutrition management on biomass partitioning and nitrogen use efficiency indices in hydroponically grown potato [0.03%]
氮营养管理对营养液栽培马铃薯植株生物量分配及氮素利用效率指标的影响
Gregory D Goins,Neil C Yorio,Raymond M Wheeler
Gregory D Goins
The National Aeronautics and Space Administration (NASA) has been conducting controlled environment research with potatoes (Solanum tuberosum L.) in recirculating nutrient film technique (NFT)-hydroponic systems as a human life support comp...
Optimizing environmental conditions for mass application of mechano-dwarfing stimuli to Arabidopsis [0.03%]
拟南芥机械控形育苗的环境条件优化研究
Jill A Montgomery,Ray A Bressan,Cary A Mitchell
Jill A Montgomery
Obtaining uniform mechano-dwarfing of Arabidopsis thaliana (L.) Heynh. seedlings within dense plantings is problematic. Alternative forms of mechano-stimulation were applied to seedlings in effort to obtain uniform growth reduction compared...
Exploring the limits of crop productivity: beyond the limits of tipburn in lettuce [0.03%]
探索作物生产潜力的极限：生菜叶尖焦枯的限制及对策
Jonathan M Frantz,Glen Ritchie,Nilton N Cometti et al.
Jonathan M Frantz et al.
The productivity of lettuce in a combination of high light, high temperature, and elevated CO2 has not been commonly studied because rapid growth usually causes a calcium deficiency in meristems called tipburn, which greatly reduces quality...
Nitrate concentration effects on NO3-N uptake and reduction, growth, and fruit yield in strawberry [0.03%]
硝酸盐浓度对草莓吸收和还原NO3-N、生长及果实产量的影响
R L Darnell,G W Stutte
R L Darnell
Strawberries (Fragaria xananassa Duch. 'Osogrande') were grown hydroponically with three NO3-N concentrations (3.75, 7.5, or 15.0 mM) to determine effects of varying concentration on NO3-N uptake and reduction rates, and to relate these pro...
A multiple chamber, semicontinuous, crop carbon dioxide exchange system: design, calibration, and data interpretation [0.03%]
一种多室半连续农作物二氧化碳交换系统：设计、标定及数据解释
M W van Iersel,B Bugbee
M W van Iersel
Long-term, whole crop CO2 exchange measurements can be used to study factors affecting crop growth. These factors include daily carbon gain, cumulative carbon gain, and carbon use efficiency, which cannot be determined from short-term measu...
Calcium localization and tipburn development in lettuce leaves during early enlargement [0.03%]
生菜叶片早期膨大过程中钙的定位和叶尖坏死的发展
D J Barta,T W Tibbitts
D J Barta
Tissue concentrations of Ca, Mg, and K were determined across immature leaves of lettuce (Lactuca sativa L. 'Buttercrunch') at different stages of enlargement using electron microprobe x-ray analysis. The analysis was with a wavelength disp...
Optimizing the calcium content of a copolymer acrylamide gel matrix for dark-grown seedlings [0.03%]
优化共聚物丙烯酰胺凝胶基质中的钙含量以促进在黑暗中生长的种子发芽
P N Myers,C A Mitchell
P N Myers
A copolymer acrylamide acrylate gel was investigated as the sole root matrix for dark-grown seedlings of soybean (Glycine max Merr. 'Century 84'). Increasing Ca2+ in the hydrating solution of the hydrogel from 1 to 10 mM decreased its water...
Predicting lettuce canopy photosynthesis with statistical and neural network models [0.03%]
基于统计学和神经网络模型预测生菜冠层光合作用
J Frick,C Precetti,C A Mitchell
J Frick
An artificial neural network (NN) and a statistical regression model were developed to predict canopy photosynthetic rates (Pn) for 'Waldman's Green' leaf lettuce (Latuca sativa L.). All data used to develop and test the models were collect...