Efficiency of soil conditioners in calcareous soil under different irrigation frequencies with saline water

الملخص EN

An experiment was carried out at Raps Sadr experimental station of the DRC, South Sinai.

The aim of this experiment was to study the efficiency of natural and synthetic soil conditioners under different irrigation frequencies (14 Vs.

21-day intervals) with highly saline water (7300 ppm) and to assess their effect on sugar beet production in a calcareous soil. The conditioners tested were; Poudrette (0, 10 and 20 ton / fed) poly acrylamide (0.0, 0.2 and0.4%), and bituminous emulsion (0.2, 0.0 and 0.4Lm-2) in a split split plot design with five replicates.

Soil properties were affected by applying soil conditioners under the two studied irrigation periods.

Water stable aggregates; soil moisture retention, i.e., field capacity, wilting percentage and available water were greatly increased with different magnitudes due to the application of soil conditioners, in contrast to that of the bulk density decreased.

Also, soil Ph, EC, SAR and ESP values decreased with different magnitudes in the conditioner treatments under both irrigation frequencies.

Types and rates of soil conditioners and / or irrigation intervals positively affected the availability of N, P, K, Fe, Mn and Zn in the studied calcareous soil.

Sugar beet production responded significantly both to irrigation frequency and to the type and rate of soil conditioners.

The addition of Poudrette, poly acrylamide or bituminous emulsion was effective in increasing the yields of both roots and leaves of sugar beet plants significantly.

The T.S.S.

(%) and N, P, K, Fe, Mn and Zn contents of sugar beet roots and leaves were also increased.

The highest yield was obtained by treating the soil with 20 ton / fed.

Of Poudrette under 14 days irrigation interval.

The finding was reflected in the increasing use efficiencies of both water and NPK by sugar beet plants.