نتایج جستجو برای: inorganic p forms

تعداد نتایج: 1571504  

ژورنال: علوم آب و خاک 2009
جلالیان, احمد, خادمی, حسین, مومنی, مسعود, کلباسی, محمود,

The forms and dynamics of soil phosphorus can be greatly affected by land use changes, which often involve changes in vegetation cover, biomass production and nutrient cycling in the ecosystem. Present research evaluates the impact of land use change on the amount of total organic and inorganic P, labile, moderately labile and nonlabile P pools in semiarid soils of central Zagros. Samples were ...

Journal: :Journal of environmental quality 2004
Jeremy C Hansen Barbara J Cade-Menun Daniel G Strawn

Two common manure storage practices are stockpiles and lagoons. The manure from stockpiles is applied to soils in solid form, while lagoon manure is applied as a liquid. Soil amendment with manure in any form introduces a significant amount of phosphorus (P) that exists in both organic and inorganic forms. However, little is known about P speciation in manure stored under different conditions, ...

Journal: :Frontiers in soil science 2023

Introduction To comprehend soil P transformation and crop uptake, it is necessary to understand how the long-term substitution of mineral fertilizers with stover or biochar affects properties forms. However, effects large-scale continuous application on forms fractions response uptake by corn are largely unknown. The purpose this study was investigate role its in variation Hedley-P fractions. M...

خادمی, حسین, دهقان, رمضانعلی , شریعتمداری, حسین ,

  Studying soil phosphorus fractions is useful in understanding soil pedogenesis as well as soil fertility. In this reseach, 20 soil samples were taken from different depths of 0-30 and 30-60 cm of upper-slope, mid-slope and lower-slope positions of four toposequences in arid (Jei and Ziar in Isfahan) and semiarid (Farokhshahr and Shahrekord) regions. In each toposequence, the soil depth was re...

Journal: :Journal of environmental quality 2005
Gurpal S Toor Barbara J Cade-Menun J Thomas Sims

Effective manure management to efficiently utilize organic wastes without causing environmental degradation requires a clear understanding of the transformation of P forms from diet to manure. Thus, the objective of this study was to establish quantitative relationships between P forms in diets, feces, and manures collected from U.S. Northeastern and Mid-Atlantic commercial dairy farms. Total P...

In the present study, twenty-five male goat kids (20±2.5 kg BW) were used during an 84- day experimental period to determine the effect of source and level of sulfur supplementation on mohair characteristics and performance. Experimental diets were diets containing 0.18% (as control), 0.24% and 0.34% DM inorganic or organic sulfur. The data were analyzed as a 2 × 2 factorial design. Methionine ...

2009
Cristiano Germani Alex Kehagias

We show that an inflationary background might be realized by using any pform non-minimally coupled to gravity. Standard scalar field inflation corresponds to the 0-form case and vector inflation to the 1-form. Moreover, we show that the 2and 3-form fields are dual to a new vector and scalar inflationary theories where the kinetic terms are non-minimally coupled to gravity.

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