تأثير مستويات السماد الفوسفاتي و مستويات الحمأة و التلقيح بالفطريات المذيبة للفوسفات في امتصاص الفسفور و نمو الذرة الصفراء (Zea mays L.)‎

الملخص EN

The study was included isolation of several strains of fungi that dissolve the phosphate from soil samples collected from AL-Hartha and Al-Midina, these strains were isolated in laboratories of department of soil science and water resources in Agriculture College of Basrah University.

The fungi isolated strains identified to their types and tested for their efficiency in dissolving insoluble phosphate and select efficiency isolate in inoculation for the biological experiment.

Biological experiment was conducted in the green house of research station of agriculture college in cultivated season (2011-2012).by use plastic pots contained 5 kg dried soil by using randomized design CRD with three replication.

Silty clay soil was used complete which inoculated with strain of phosphate dissolving fungi type Aspergillus niger and trisuper phosphate fertilizer was also added to the pots in four levels (0,40,60,80) kg hr-1 also sewage sludge (collected from Hamdan station for sewage treatment) was added to the pots in the levels (0,60,100)kg hr-1 and nitrogen and potassium fertilizers were added in constant level according to fertilizing recommendation.

The pots were cultivated with corn seeds (Zea mays L.) as (10seeds/pot) and irrigated with local water with filed capacity (1/3bar) after plant grow reduced the numbers of plants to (6 plants/pot) and after 60 days the plants were cut and dried.

The shoot and roots and soil samples were digested for estimating the content of phosphor The results were indicated significant increased in dry weight for both leaves and roots of plant with increasing of phosphate fertilizer and sewage sludge levels(p<0.05).

The inoculation with phosphate dissolving fungi cased increase in dry weight in inoculated soil as compared with non inoculated soil.

Significant increase in the phosphate uptake in both shoot and roots of plants with increase level of adding phosphate fertilizer (p<0.05).