搜索结果: 1-15 共查到“土壤化学 phosphorus”相关记录17条 . 查询时间(0.5 秒)
Phosphorus fractions in arable and mountain soils and their humic acids
inorganic P organic P soil types humic acids 31P NMR
2015/1/30
Soil phosphorus (P) can exist in various inorganic (Pi) and organic forms (Po). Specific determination of Pi can be obtained by fractionate methods. However, the discrimination between the chemically ...
Efficient Phosphate Solubilization by Fungal Strains Isolated from Rice-rhizosphere Soils for the Phosphorus Release
Fungi Rice-soil Acid phosphatase phosphorus insoluble phosphate
2010/11/16
Out of 42 fungal strains, twelve efficient strains of phosphate solubilizing fungi were isolated, screened and characterized from paddy soils of southern peninsular region of Tamil Nadu, India. Minera...
Nitrogen and Phosphorus Removal from Wastewater by Useful Plants and the Effect of Shading on the Removal Efficiency
Nitrogen removal Phosphorus removal Shading Solar radiation Wastewater
2009/7/22
Nitrogen and phosphorus removal from wastewater by a ditch planted with several plants, including terrestrial species, was studied. The effects on the removal rate by shading were also examined. Papy...
Effect of Organic and Inorganic Amendments on Phosphorus Fractions in Soils under Submerged Condition
Phosphorus fractions Poultry manure Cowdung Triple super phosphate
2009/3/12
A laboratory experiment was conducted to document the effect of organic and inorganic amendments on soil P fractions under submerged conditions and to gain understanding of the changes in different P...
Phosphorus sorption characteristics in some calcareous, non-calcareous and acid piedmont soils of Bangladesh
Phosphorus sorption buffering capacity energy of adsorption isotherm equations rice soils
2009/3/12
A laboratory experiment using Calcareous, Non - Calcareous and acid Piedmont soils was conducted to estimate the phosphorus (P) sorption characteristics. Evaluation of the fitness of Langmuir, Freundl...
Utilization of phosphorus from different sources by genotypes of promiscuous soybean and cowpea in a low-phosphorus savanna soil
Soybean cowpea genotypes savanna soil sparingly soluble phosphorus
2009/3/3
The differential ability of genotypes of soybean (Glycine max) and cowpea (Vigna unguiculata) to thrive under low-phosphorus (P) conditions by utilising P from sources with low solubility was assess...
Soil available phosphorus has been measured using chemical extractants and ion-sink methods comprising of resin membranes and FeO coated filter papers or strips. This study compared the conventional...
Determination of Phosphorus Adsorption Using Various Forms of Isotherms in Soils of Adıyaman Çamgazi Plain
Phosphorus Adsorption Various Forms of Isotherms Soils of Adı yaman Ç amgazi Plain
2009/1/16
Samples from 8 widespread soil series from Adıyaman Çamgazi Plain were equilibriated at a constant temperature with 16 different solutions containing 0 to 50 mg/ml phosphorus in batch-type...
Phosphorus Adsorption of the Soils of the Gaziantep Kayacık Plain
Phosphorus Adsorption Gaziantep Kayacı k Plain
2009/1/16
The phosphorus adsorption characteristics of 11 widespread soil series from Gaziantep Kayacık Plain were investigated and these characteristics were evaluated with regard to various soil properti...
Effects of VA-Mycorrhiza on Growth and Phosphorus, Zinc, Iron, Copper and Manganese Concentrations of Maize Grown in Acid and Alkaline Soils
VA-Mycorrhiza (Glomus etunicatumand Glomus intraradices) maize P Zn Fe Cu Mn concentrations
2009/1/14
The aim of this study was to determine the effects of VA Mycorrhiza on P, Zn, Fe, Cu and Mn uptake by maize grown in alkaline and acid soils. For this purpose, maize was grown in sterilized alkaline a...
Effect of Organic and Bio-fertilizers on Phosphorus and Some Micronutrients Availability in a Calcareous Soil
Arbuscular mycorrhizal fungi (AM infection) organic compost phosphorus
2010/11/11
The results obtained clearly show that the combined treatment of (AM+ organic compost) significantly increased the released P and micronutrients in the soil. This may be due
to lowering soil pH and f...
Phosphorus losses from a subdrained clayey soil as affected by cultivation practices
Phosphorus eutrophication conservation tillage moldboard ploughing runoff drainage
2010/8/9
Conservation tillage practices are included in the Finnish Agri-Environmental Program as phosphorus (P) loss control measures, but only few experiments have been performed to check their effectiveness...
Extractability of slurry and fertilizer phosphorus in soil after repeated freezing
SOINNE HELENA PELTOVUORI TOMMI
2010/8/11
The potential effects of freezing on phosphorus (P) chemistry in Finnish soils are not well known. We studied the effects of multiple freeze-thaw cycles on soil P chemistry in a laboratory incubation ...
Phosphorus status of diverse soils in Finland as influenced by long-term P fertilisation 2.Changes of soil test values in relation to P balance with references to incorporation depth of residual and freshly applied P
Acetate extractable P Olsen P sampling depth total P water extractable P
2010/8/13
Fertilising with phosphorus (P) ensures continuous supply of an essential growth factor as necessary for productive and sustainable agriculture. The amounts of P required to attain and maintain an ade...
Phosphorus status of diverse soils in Finland as influenced by long-term P fertilisation I.Native and previously applied P at 24 experimental sites
Acetate method phosphorus Olsen P P saturation index secondary inorganic P total P water extractable P
2010/8/13
The native reserves of phosphorus (P) in Finnish soils are sizeable but poorly available to plants. The P status has been generally poor, but large rates of P applied since the 1940s have substantiall...