نتایج جستجو برای: nutrient solutions

تعداد نتایج: 406443  

Journal: :Plant physiology 1967
D L Johnson L S Albert

In a previous paper Albert (2) reported the RNA content of root tips of intact tomato plants decreased and boron deficiency symptoms occurred concurrently wlhen boron (B) was withheld from nutrient solutions in which the plants were growing. It was also observed that elongation of root tips stopped 6 to 12 hours and the RNA content of tips decreased 24 to 48 hours after B was withlleld. The DNA...

Journal: :international journal of environmental research 0
j.f. ying college of environment and resource science, zhejiang university, hangzhou 310029, p.r.china tea research institute, fujian academy of agriculture science, fu,an, 355000, p.r.china ch. xin college of environment and resource science, zhejiang university, hangzhou 310029, p.r.china l.a. cheng

fifteen kinds of local wetland plants in taihu lake region of china were investigated on their respective growth conditions, biomass allocations and nutrient uptake capacities. the test plants were cultured in 3 l nutrient solutions for 28 days with nh4 +-n, no3 --n and p concentrations of 38.5, 132.8 and 10 mg/l, respectively. mean species total biomass ranged from 1.2-21.6 g/plant with above/...

2014
Val O. Snow Richard J. Eckard C. Alan Rotz Ian R. Johnson Nicholas J. Hutchings

Animals are well known to be important in lateral transfers of nitrogen within the farm boundary. Those transfers can be categorised into those that are: (a) primarily random and smallscale dung and urine patches within a grazed paddock, (b) larger and systematic transfers resulting from preferred grazing and resting areas and (c) those that are additionally mediated by management actions such ...

Ahmet Cemal Saydam, Mahdi Iranmanesh, Ramin Ezzati,

It is shown that Saharan soil has the potential of producing bioavailable iron when illuminated with visible light and also it contains some essential macronutrient and micronutrient elements. In this study, these properties of the desert soil were tested on the certified wheat cultivars (Triticum aestivum L. var. gonen 98) using Hewitt nutrient solution, illuminated and non-illuminated soil so...

Journal: :ecopersia 2013
abdollah rostamabadi masoud tabari ehsan sayad ali salehi

this study was conducted to choose the best species for plantation on a poor drainage soil in southern coast of caspian sea, iran. nutrient concentrations in live and senescent leaves and soil properties were compared among alnus subcordata c.a.mey (n-fixing tree), populus deltoides­ marsh. (non n-fixing tree)and taxodium distichum (l.) rich. (coniferous tree) plantations. in each of these plan...

2011
Juan Morales José Manuel Astilleros Lurdes Fernández

Anhydrite (CaSO4) is a major component of evaporitic rocks and is currently forming in submarine hydrothermal fields, where its dissolution and precipitation plays a significant role in controlling porosity. Anhydrite also is a component of undesirable scale on heat transfer surfaces during desalinization and waste water treatments. Knowledge of the molecular processes that control anhydrite gr...

Wheat is a strategic commodity, and so its distribution system is always one of the major issues facing countries. The cost of wheat distribution and storage and the differences in the nutrient content of different wheats, have caused complicated problems in the wheat supply chain. In addition to controlling distribution costs, it could enhance the quality of wheat through blending different ki...

2010
M. Gholami

Chloride and sodium are the main ions contributing to soil salinity in many regions but chloride is an essential element necessary for plant growth and development. It also controls the growth of some pathogens in plants. In this experiment, the effect of the chloride ion in nutrient solution on yield and fruit quality of two strawberry cultivars: ‘Selva’ and ‘Camarosa’ grown in hydroponic cult...

2006
Iwona Kowalska

The effect of various concentrations of sulphates in the nutrient solutions (I – 200, II – 400, and III – 600 mg SO4 2dm) on sulphur content in plants as well as plant height and leaf area of tomato plants grown with nutrient film technique (NFT) were investigated. Total-S and S-SO4 levels were determined in the leaf blades of the upper, medium and lower plant parts, during 3 phases of tomato g...

شیروانی, مهران, قاسمی, سمیه, محقق, پروانه,

Silicon (Si) has beneficial effects on the growth, yield, and tolerance of some crops against biotic and abiotic stresses. Considering the absence of Si in the nutrient solutions used in hydroponically-grown cucumber, the present study was conducted to investigate the influence of Si on the growth and yield of two cucumber genotypes (Cucumis sativus L. cvs. Dominus GRC and Super Dominus). In a ...

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