نتایج جستجو برای: available phosphorus

تعداد نتایج: 607943  

2004
W. Schmidt

Animal Sciences Introduction The primary constituents of diets for poultry and swine are plant-based ingredients which come primarily from the seeds of plants. Most of the stored phosphorus in plants is found in seeds mainly as a component of a molecule called phytin. Phytin-phosphorus is poorly available to poultry and swine, and this availability varies both within and among ingredients. The ...

ژورنال: علوم آب و خاک 2014
حسن توفیقی, , نصرت‌اله نجفی, ,

Phosphorus behavior in waterlogged soils is significantly different from non-waterlogged soils. Changes in available phosphorus and inorganic phosphorus fractions after waterlogging in the paddy soils of north of Iran were studied in a laboratory research. A factorial experiment in a completely randomized design with two replications was performed with factors of soil at 14 levels (10 alkaline-...

2014

High phosphorus concentrations causing eutrophication will prevent many lakes in England and Wales from reaching good ecological status by 2015 according to the EC Water Framework Directive (WFD). The aim of this study was to estimate the percentage of lakes in England and Wales that are likely to fail recently agreed WFD phosphorus standards. As measured lake phosphorus concentrations are only...

Journal: :پژوهش های زراعی ایران 0

introduction phosphorus (p) is an essential element in crop nutrition, which can be growth limiting or an environmental contaminant, if present in excess. on the other hand, tillage practices have a direct effect on behavior and availability of soil p. since, application of different tillage methods lead to different patterns of soil phosphorus distribution, hence p fertilizer needs and p avail...

Journal: :Bioresource technology 2013
M F R Zuthi W S Guo H H Ngo L D Nghiem F I Hai

A modified activated sludge process (ASP) for enhanced biological phosphorus removal (EBPR) needs to sustain stable performance for wastewater treatment to avoid eutrophication in the aquatic environment. Unfortunately, the overall efficiency of the EBPR in ASPs and membrane bioreactors (MBRs) is frequently hindered by different operational/system constraints. Moreover, although phosphorus remo...

Journal: :به زراعی کشاورزی 0
طاهره رضاپور کویشاهی دانشجوی کارشناسی ارشد، گروه زراعت، دانشکدة کشاورزی، دانشگاه آزاد اسلامی واحد رشت، رشت، ایران محمد حسین انصاری استادیار گروه زراعت و اصلاح نباتات، دانشکدة کشاورزی، دانشگاه آزاد اسلامی واحد رشت، رشت، ایران. معرفت مصطفوی راد استادیار، بخش تحقیقات زراعی و باغی، مرکز تحقیقات کشاورزی و منابع طبیعی استان گیلان، رشت، ایران.

to evaluate the effects of some phosphorus solubilizing bacteria strains on yield and agronomic traits in local bean (phaseolus vulgaris l.) of guilan, different phosphate fertilizer rates were tested during 2014 growing season. this research was carried out in experimental field of agricultural and natural resource research center of guilan province as split plot arrangement based on randomize...

2017
Scott T. McClure Alex R. Chang Elizabeth Selvin Casey M. Rebholz Lawrence J. Appel

Interest in the health effects of dietary phosphorus is burgeoning, yet sources and trends in phosphorus consumption have not been well characterized. We describe trends in and primary sources of dietary phosphorus in a nationally representative sample of 34,741 US adults, 20+ years old (NHANES 2001-2014). Dietary sources of phosphorus were estimated in nine food groups and 26 food categories. ...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید