استخدامات الجبس لتحسين خصائص ومواصفات الترب الملحية للزراعة

الملخص EN

This study was conducted with the aim of using gypsum ore deposits as raw materials and natural resources on the one hand, and on the other hand, the possibility of applying it to sodic agricultural soils to amend them and improve their physical properties because of its many benefits.

Studies have shown that gypsum is more effective than lime in meeting the calcium requirements in plants when They need extra calcium.

The study included several aspects to evaluate the possibility of applying gypsum to saline soils in order to amend them and improve their physical properties, making them more suitable for agriculture and achieving higher rates.

Therefore, soil was brought from three agricultural areas on the outskirts of the city of Tobruk and mixed together to form soil representing different soils, and it was filled in plastic pots with a diameter of 18 cm, where corn seeds were planted at a depth of 2 cm.

Irrigation water with different concentrations of salinity was used to irrigate the seeds of maize plants to see the response and ability of these seeds to germinate and grow in different conditions to the specifications of the irrigation water without treatment by adding gypsum powder.

Different saline groundwater concentrations are used for irrigation, for three consecutive weeks.

Sodium chloride (NaCl) salt solutions were prepared in order to simulate different salty soils.

Through these solutions, weights of 2 grams, 4 grams, 6 grams, 8 grams and 10 grams were taken and dissolved in distilled water, and the volume was completed to one liter (1000 ml).

Growth rates of maize plants were measured for all treatments of different irrigation water concentrations for three consecutive weeks by measuring seedling height, leaf length and width, leaf area, number of lateral roots, stem length, wet and dry weight, initial root stage and number of lateral roots.

In this study, gypsum was applied to the agricultural soil used in the study at a rate of 2 tons/acre and 3 tons/acre, and the growth rates of the plant were monitored during the study period of three weeks.

The study included three case studies, each case included a group of samples as follows: Group A: It represents soil samples without treatment (adding gypsum) at different concentrations of irrigation water with brine, in addition to the control sample.

Group B: It includes soil samples as in group A, treated with gypsum at concentration levels of 12.11 g/pot (ie 2 tons/acre).

Group C: It includes soil samples as in group A and treated with gypsum at concentration levels of 18.16 g/pot (i.e., 3 tons/acre).

The germination process of the maize plant was completed after seven days, which shows the clear variation in germination rates at different concentrations of the saline solution, which indicates the effect of soil salinity on the germination and growth rates of the plant, where the highest germination rate was in the control sample (86.7%) and the lowest germination rate in the sample.

S5 (45.19) at 10g focus.

The results showed the extent of improvement in plant growth rates among samples treated with gypsum powder in groups B and C compared to untreated group A.

The results also revealed that the plant growth rates increased with the increase in the rates of adding gypsum powder, as the growth rates in group C were higher than the growth rates in group B.

The rates of adding gypsum powder in group B were 12.11 grams/pot, while in group B it was 18.16 gram/pot.

The rates of adding gypsum powder to the soil depend on the type of agricultural soil in terms of its physical and chemical properties and the degree of sodicity.