application of biofertilizers containing free-living nitrogen fixer micro organisms in agriculture

نویسندگان

هوشنگ خسروی

عضو هیأت علمی مؤسسه تحقیقات خاک و آب

چکیده

atmospheric nitrogen fixation as an exclusive phenomenon is accomplished by nitrogenase enzyme of prokaryotic microorganisms namely diazotrophs including bacteria, actinomycets and cyanobacteria. nitrogen fixation is accomplished as form of symbiotic, associative and free-living systems. in free-living systems nitrogen is fixed without the help of plants. azotobacter, the first diazotroph was discovered over a century ago and application of it was started in agriculture about half a century ago. nowadays, in some countries a large amount of diazotrophs are used as inoculums. in recent years, some companies produce diazotroph inoculums in iran. some kinds of organic and inorganic such as torb, perlite, and charcoal, bran and cane molasses are suitable for diazotroph inoculums careers. the population of inoculums is reported as number  of microorganisms per milliliter or gram of inoculums and recommended for a certain amount of seeds or in hectare. the diazotroph inoculums’ are used in form of soil or seed and seedless application or in rhizosphere of trees.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Role of bacterial biofertilizers in agriculture and forestry

Many rhizospheric bacterial strains possess plant growth-promoting mechanisms. These bacteria can be applied as biofertilizers in agriculture and forestry, enhancing crop yields. Bacterial biofertilizers can improve plant growth through several different mechanisms: (i) the synthesis of plant nutrients or phytohormones, which can be absorbed by plants, (ii) the mobilization of soil compounds, m...

متن کامل

Adaptation in Micro-Organisms

all the humdrum of mental undressing, dressing, shaving, etc., there is the chance reward of being confidential ear to what may never be so well expressed or thought of again. The contributors of the "relatively brief" presentations are six in number. Alex Bavelas talks on "Communication patterns in problem-solving groups"; Ivor A. Richards, on "Communication between men: Meaning and language";...

متن کامل

Micro-organisms in gastroenteritis.

We present bacteriological and virological findings together with salient clinical features from a prospective study of 447 children aged under 2 years admitted to hospital with infectious gastroenteritis. Putative pathogenic micro-organisms were identified in the stools of 75% of these children. Eight identifiably distinct groups of viruses, found on electron microscopy and tissue culture were...

متن کامل

Bioelectrodynamics in living organisms

This article introduces an interdisciplinary subject of bioelectrodynamics in living organisms and its related research challenges and opportunities. Bioelectrodynamics in living organisms is aimed to reveal critical roles of electromagnetism and mechanics in biology, to correlate biophysical functions of living organisms with biochemical processes at the cellular level, and to introduce theore...

متن کامل

Polyamines in living organisms

Natural polyamines, putrescine, spermidine and spermine are ubiquitous cell components essential for normal cellular functions and growth. Chemically these compounds are very simple organic aliphatic cations and fully protonated under physiological conditions. There is a strong correlation between proliferation rate of the cells and their polyamine contents. Adjustments of intracellular concent...

متن کامل

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید


عنوان ژورنال:
مدیریت اراضی

جلد ۲، شماره ۱، صفحات ۵۱-۶۳

کلمات کلیدی

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023