تأثير التسميد بكومبوست حمأة الصرف الصحي المعاجلة في إنتاجية شجريات القطف الملحي و القطف الأمريكي

الملخص EN

This Research was conducted at Izraa Research Station, The Arab Center for the Studies of Arid zones and Dry lands (ACSAD) to study the effect of fertilization with the compost of treated sewage sludge on Atriplex halimus and Atriplex canescens shrubs productivity during the growing seasons of 2017 and 2018.

Treated sewage sludge was acquired from Al-Haijaneh station for treating waste water located in Rif-Dimashq Governorate.

Compost was produced by fermentation of the treated sewage sludge for six months.

Seedlings of Atriplex halimus and Atriplex canescens were produced in rangeland plants field in Izraa Research Station.

Seedlings were transplanted in the field at age of one year using the randomized complete block design with four replicates.

Four fertilization levels of the compost (control, 3,6,9 ton/ha) were applied.

The results showed that the compost of treated sewage sludge produced in this experiment was safe regarding its contain of pathogens and heavy metals (Zn, Mn, Fe, Cu, Pb, B, Ne, Cr, Cd) with values less than the Syrian Standards.

Atriplex halimus was significantly superior on Atriplex canescens in fresh and dry productivity, shrub crown coverage, and shrub crown volume.

While, Atriplex canescens was significantly superior on Atr.

halimus in plant height only.

The highest values of the studied parameters were obtained by using 9 ton/ha of the compost of treated sewage sludge.

The interaction between plant species and compost fertilization levels showed that Atriplex halimus achieved the highest values in fresh and dry productivity (6.5 and 2.85 kg/shrub), respectively, and the shrub crown volume (3.37 m3); while Atriplex canescens at the same fertilization level gave the highest value of shrub crown cover (4.29 m2).