اعلانات هامة

Apot expermient was carried out by adding three types of organic matter ( straw, compost, manure ) into 9 treatments of soil, divided into groups , to study the effects of each additive on the number and activity of actinomycetes in soil. The results indicated that these additions were increased the activities and numbers of actinomycetes, and the increasing became larger after adding more amounts of organic matter (4m³) which had positive effects on the growth of these bacteria and their activities The results has also shown that most stimulating organic additive was manure and the large remarkable increase was in the development of number and activity of actinomycetes after manure addition then compost and straw in the soil respectively.

Furthermore it appeared that ( Nocardia- sp) had the best ability for cellulose decomposing, where seven genera of actinomyces were isolated.

Key words : actinomycetes , microbiogical activity, C/N

جرى تنفيذ تجربة أصص عاملية ( 9 معاملات) بواقع ثلاث أنواع من الإضافات العضوية (سماد اسطبل - كمبوست - قش قمح ) وبواقع كميتين لكل نوع عضوي بهدف دراسة تأثير كل من قش القمح وسماد الاسطبل والسماد العضوي( الكمبوست)على أعداد ونشاط جراثيم الشعيات .