تاثير طرق التخمر في بعض صفات المخلفات الحيوانية و فعالية انزيم الفوسفيتيز القاعدي في تربة رملية مزيجية

Abstract EN

Addition of animal composts from various sources are good source of C and other nutrients, but their effect on soil biochemical properties, such as enzyme activities depend on maturity characteristics.

An incubation experiment was conducted at soil and water sciences department, college of agriculture to evaluate the effect of poultry, sheep, goat or cattle residues composting at three methods: aerobic decomposition, anaerobic decomposition or soaking in water on alkaline phosphatase activity in soil.

Soil of study was loamy sand collected from tomato fields of Al–Zubair region, Basrah and classified as Entisol; Typic–quartzipsamment.

Soil was treated with three levels of compost manures ( 2 , 4 or 6 % w/w ) and incubated at 25 °C for 40 days, then alkaline phosphatase activity was assayed at 10 days intervals.

Results showed that all manures type increased the soil alkaline phosphatase activity compared with control.

Poultry compost showed highest enzyme activity among all compost types.

Higher alkaline phosphatase values were associated with soils treated with aerobic compost compared with soils treated with anaerobic or soaking composts.

Data also revealed that alkaline phosphatase activity increased with increasing compost level, and decreased with increasing time of incubation until 30 days, then increased significantly at 40 days of incubation.