The role of activated phosphorous sources in enhancing soil quality and rice productivity under saline sodic soil conditions

الملخص EN

Two field experiments were conducted at el-Sirw Agriculture Research Station, Damietta province, Egypt in 2018 and 2019 seasons to improve the efficiency of phosphorous fertilizer for rice under saline sodic soil using organic activation of phosphorous.

The experiments were performed in randomized complete block design with four replications to cope with the phosphorous unavailability.

Salinity and ESP levels of experimental sites were 9.00 and 9.12 dSm-1; 18.17 % and 18.27 % in both seasons respectively.

The treatments involved, control, molasses, calcium super phosphate, rock phosphate, mono-ammonium phosphate and the three phosphorous sources in activation forms.

Applying various sources of phosphorous were effective in enhancing rice growth, soil fertility and rice grain yield.

The activated phosphorous was more efficient than the non-activated ones regarding elevated soil quality, soil fertility, root characteristic, growth parameters, rice grain yield and all yield attributing characteristics.

Active calcium super phosphate was the superlative followed by active monoammonium phosphate.

Rock phosphate was improved after applying the active material and equally to super phosphate in some studied characteristics.

It could be concluded that applying organic activator material for different P sources much needed to enhance the beneficial of phosphorous application for rice plants growing under saline sodic soil.