دور بكتيريا الAzotobacter و الفطر Trichoderma و الأسمدة الكيميائية في جاهزية بعض العناصر و نمو نبات الشعير

Abstract EN

To study the role of T.

harzianum fungi and Azotobacter bacteria in availability of some elements.

pots experiment was conducted in SiCL sterilized soil.

samples of soil were collected to isolate fungi and bacteria .

Whereas soil study was collected from cultivated field and air dried , sieved 4mm diameter sieve , then sterilized with methyl promid Gas and put in 5 k gm pot .

The experiment included two isolates of Azotobacter cod A1, A2 and two levels of T.

harzianum fungi inoculums cod T1 , T2 respectively , also A0 , T0 without treatment .

Fertilizer treatments included cod F1 half of recommended fertilizer and F2 cod treatment for recommended fertilizer.

.Whereas F0 without addition fertilizer.

The design was RCBD.

fungi inoculums added to the pots and sowing sterilized barely seeds while bacterial treatments the seeds were mixed with inoculums.

After that sowing was conducted in the pots .

fertilizers were add N , P , K in half and fall levels of recommended fertilizer after 90 days calculate the following parameter , dry weight , ( N , P , K , Fe ) concentration in shoots and number of branches and plant height .

results indicated that significant increase in plant height with Azotobacter treatment which reached 6.89%, 6.89% for A1, A2 respectively compared with control whereas fungi treatments gave an increase which reached 7.33% , 7.48% for T1 , T2 treatment respectively .

combined treatments also gave significant increase reached 52.3% , 47.93% for F1 T1 A2 , F2 T1 A1 respectively compared with control .

Interaction treatments showed an increase in shoot dry weight which gave 18.08% , 22.87% , 20.4% , 19.32% for T1 A1 , T1 A2 ,T2 A2 , T2 A1 respectively .

Nitrogen concentration in plant gave significant increase 56.37% , 60.29% with F1T1A1 , F1T1A2 treatment respectively with half recommended fertilizer whereas fall recommended fertilizer gave an increase 63.24% , 49.01% for F2T1A2 , F2T1A1 respectively .

While phosphor and potassium treatment gave increasing in combined treatment which reached 9.68%, 13.25% , 7.13% , 7.85 in half recommended fertilization with T1A1, T1A2, T2A1, T2A2 treatments respectively also fall recommended gave significant increasing.