Почвоведение и агрохимия
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Почвоведение и агрохимия, №4, 2020 issues of improving saline soils in the sasa belt of the Ili Alatau foothill plain require further development and generation of practical experience in its implementation. OBJECTS AND METHODS Experimental studies were carried out at the Teskensu (Kaz.Teskensu) village in the Enbekshikazakh district (43°32' N, 77°51' E) of the Almaty region of Kazakhstan (Figure 1). The study area is situated between 601 m elevation from sea level. Figure 1 - Location map of the study area The climate type of study area is “Continental Climate” which can be de- scribed as low humidity, plenty of sunlight, a short but rather cold winter. The average annual air temperature is 12.3 °C, total rainfall is 275.7 mm. The average long- term sum of precipitation for a period with temperature above 10 °С is 198-245 mm [5]. The field experiment Between 1985 and 1989, the field experiment established by S. Kaldybayev to ameliorate with alfalfa (Medicago sativa L.) cultivation soils in some parts of meadow Solonchaks[5-6] (Beketova et al., 2017; Yerteyeva et al., 2018). From 1989 until 2017, alternating leguminous plants (especially leguminous vegetable and alfaalfa) were grown integrated production without other amelioration methods in bio -ameliorated meadow Solonchaks. Other parts in meadow Solonchak is virgin land. In the key areas (under the alfalfa sowing and in the control plot for deter- mining the Seasonal Accumulation of Salts (SAS) at a 200 m interdrain area) soil sam- ples were taken every 20 cm to a depth of 1 m and the following was performed and determined: 1 The aqueous extract analysis -by the K.Gedroits method [7]. 2 Granulometric composition - by pipetting method [7]. 3 СО 2 -carbonates -by volumetric method [7]. 4 Total absorbed bases – by P. Graba- rov method [8]. 5 Totalnitrogen - byKjeldahl [8]. 6 Gross phosphorus - by K. Ginzburg, G. Shchegolova[8]. 7 Hydrolyzed nitrogen - by I. Turin [7]. 8 Nitrates in aqueous extract from fresh soil samples -by Grandval-Liazhu and by ion-selective method [8]. 9 Labile phosphorus and exchange potassium -by B. Machigin in the modifica- tion of B. Grabarov [8]. 10 Bulk weight -by using cutting cyl- inder [7]. 11 Specific weight -by V. Faintsim- mer (for saline potting soils) [7]. 12 Total porosity -by calculating bulk and specific weight data [7]. 13 Minimumwatercapacity [7]. 14 Water permeability -by flooding the natural soil using cutting cylinders [7]. 15 The degree and types of soil sali- nization -by anionic and cationic composi- tion [7]. |