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Register a new userThe effect of phosphate solubilizing bacteria and organic manure on solubilization of phosphate rock and cotton productivity
دراسة تأثير البكتريا المحللة للفوسفات و زبل الأبقار في إذابة فوسفور الصخر الفوسفاتي و تأثيره في إنتاجية نبات القطن
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درس تأثير البكتريا المحللة للفوسفات (megaterium Bacillus) و السماد العضوي (زبل الأبقار) في إذابة فوسفور الصخر الفوسفاتي السوري في التربة و تأثيره في إنتاجية نبات القطن ضمن تجربة حقليـة لموسمين 2003 و 2004 في محافظة ادلب، إذ أضيف الصخر الفوسفاتي و سماد السوبر فوسفات بكميات متساوية من P2O5 ، كما سمدت بعض القطع التجريبة بسماد اليوريا و بعضها الآخـر بـسماد عـضوي متخمر (زبل أبقار) بمعدل من N يساوي مثيله من سماد اليوريا (توصية وزارة الزراعة لنبـات القطـن) و ذلك بوجود البكتريا و دونها. أُخذت قراءتان خلال تشكل الجوزات و نهاية جني القطن، و قدر الفوسـفور المتيسر في التربة و جرى تعداد البكتريا المحللة للفوسفات في ريزوسفير نبات القطن. لوحظت زيادة معنوية في الفوسفور المتيسر في المعاملات الملقحة بالبكتريـا و المـسمدة بالـسماد العضوي مقارنة بالشاهد، كما ازداد عدد البكتريا المحللة للفوسفات في ريزوسفير نبات القطن و ذلك فـي المعاملات الملقحة مقارنة بالمعاملات غير الملقحة. و لوحظت زيادة معنوية في إنتاج القطن و ذلـك فـي المعاملات الملقحة بالبكتريا المحللة للفوسفات، و كان أكثر المعاملات زيادة في الإنتاج المعاملة (تربـة + سماد عضوي + صخر فوسفاتي + بكتريا).
A field experiment was carried out during 2003 and 2004 in Edleb governorate to study the effect of phosphate solubilizing bacteria (Bacillus megaterium) and cows manure on solubilization of phosphate rock, cotton productivity, and phosphate uptake. The amounts of phosphate rock and superphosphate were added by the same amount of P2O5. An amount of nitrogen fertilizer as urea, was added to treatment 1, 2, 3, 4, 5, and 6 , whereas treatment 7, 8, 9, 10, 11, and 12 received amounts of organic fertilizer having the same amount of N added to treatment 1-6 (MAAR recommendation).
References used
Alagawadi, A. R. and A. C. Gaur 1988. Associative effect of Rhizobium and phosphate solubilizing bacteria on the yield and nutrient uptake of chickpea. Plant and Soil 105. 241 – 246
Alagawadi, A. R., and A. C. Gaur 1992. Inoculation of Azospirillum brasilense and phosphate solubilizing bacteria on yield of sorghum in dry land. Tropical Agriculture. 69: 4, 347-350
Ammal, U. B., and S. Mahimairaja 1999. Use of Tunisia rock phosphate with organics on Typic Inceptisol for cotton and greengram. Madras Agricultural Journal. 86: 1-3, 149-151
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A field experiment was carried out during 2002 at Al-Husainea - Deer Al-
Zour to study the effect of PSB (Pseudomonas) or PSB combined with 50%,
25%, 100 % of the recommended phosphorus (P2O5) mineral fertilizer without
inoculation on cotton produ
ctivity, phosphate uptake .
Significant differences in available phosphate were noticed in comparison
with the control. These microorganisms were effective in solubilizing of fixing
phosphate in soil and fixing phosphate, added to the soil as superphosphate.
Significant increasing in cotton yield of inoculating treatments was noticed in
comparison with the control.
Bacteriophages specific for Bacillus megaterium were isolated and were found to
be common in soil of the Experimental Farm of Fac. Agric., Minia Univ., Egypt.
A bacteriophage resistant mutant of B. megaterium was successfully isolated.
The efficie
ncy of the isolated mutant, free and immobilized cells of B. megaterium
in dissolving insoluble phosphate and their susceptibility to phages were studied in
pure liquid cultures (in vitro) and under cultivated soil conditions (in vivo).
The objectives of this were to investigate the response of Lupinus albus sp. to
phosphate rock (PR) as a source of phosphorus (P) nutrition, and to study the role organic
acid (Citric and Malic) in phosphorus dissolution from PR. Tow experiments we
re
conducted: 1) A greenhouse pot experiment, in order to study the response of white lupin
to the application of PR and Triple super phosphate TSP at three application rates (100-
450-800 ppm). 2)- A laboratory experiment in order to study the role of Citric and Malic
acids concentration and initial pH in P- release from PR. The results showed that Lupinus
albus sp. was able to use PR for P-nutrition, and has a relative agronomic effectiveness of
61% when compared to TSP. The possible Exuded organic acids such as Citric and Malic
were responsible for PR dissolution due to tow mechanisms: 64% of PR dissolution was
due to pH decrease in the rhizosphere area, and 34% due to chelating of calcium cations.
PR dissolution was increased by the increase organic acid concentration, but decreased
when the initial pH value increased. Dissolution was always more pronounced with citric
than malic acid.
نفذ البحث خلال الموسم الزراعي (2014) م في الساحل السوري في محافظة طرطوس لدراسة تأثير أربع كثافات نباتية وثلاث مستويات من الأسمدة
Cotton is considered as one of the most important crops grown in AL-Ghab plain and which distinguish by excessive requirements from mineral elements.The importance of this study comes in trying to increase the economic proceeds of cotton crop by guidance of using of fertilizers and keeping soil fertility
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