Efficiency of complex NPK fertilizers obtained from conversion alkaline solution at potassium sulphate production

Waste-free technology for producing chlorine-free fertilizers (potassium sulphate) and recycling liquid wastes (conversion liquors of potassium sulphate production) for obtaining additional products (various grades of complex fertilizers based on them) allowing to reduce price cost of plant production is vital for agricultural production. The paper dwells on results of studies on production and agrochemical efficiency of complex NPK fertilizer of 16-10-16 grade obtained based on conversion alkaline solution at potassium sulfate and ammophos production. Fertilizer is obtained by method of low-temperature conversion of potassium chloride with ammonium sulfate. It allows to obtain chlorine-free fertilizer (potassium sulfate) and arrange processing of conversion alkaline solution to obtain a wide range of complex fertilizers, including the experimental brand. Agrochemical efficiency of NPK fertilizer (16-10-16 grade) during cultivation of vegetable crops (carrot, cabbage, onion) on sod-podzolic loose soil was determined. It was determined that nitrogen-phosphorus-potassium fertilizer of 16-10-16 brand in equivalent doses with standard solids (urea, ammoniated superphosphate, granulated potassium chloride) during cultivation of vegetable crops provides yield of carrot, cabbage and onion at the level of the standard (standard solids) with no significant changes in product quality, there is only a tendency to increase of sugar and reduction of nitrate content in products. The complex NPK-fertilizer of 16-10-16 brand has been recorded in the “State Register of Plant Protection Products and Fertilizers Allowed on the Territory of the Republic of Belarus” and is allowed to be used at agro-industrial complex and for retail sale.

1. Peterburskii A. V., Yanishevskii F. V. Forms of potassium in soil under the conditions of a long-term fertilizer application. Izvestiya Timiryazevskoi sel’skokhozyaistvennoi akademii [News of the Timiryazev Agricultural Academy], 1963, no. 6, pp. 113-124 (in Russian).

2. Dospekhov B. A. The action of the 63-year application of fertilizers on the fertility of sod-podzolic soil. Doklady sovetskikh uchastnikov kongressa: VIII mezhdunarodnyi kongress po mineral’nym udobreniyam [Reports of the Soviet Congress Participants: the VIII International congress on mineral fertilizers]. Moscow, 1976, pt. 1, pp. 207-215 (in Russian).

3. Nikitishen V. I. Agrochemical bases for the effective use of fertilizers in intensive agriculture. Moscow, Nauka Publ., 1984. 214 p. (in Russian).

4. Nikitishen V. I. Soil fertility and sustainable functioning of agro-ecosystem. Moscow, Nauka Publ., 2002. 257 p. (in Russian).

5. Nikitishen V. I. Plant nutrition and fertilizing of agro-ecosystems in the conditions of high plains of Central Russia. Moscow, Nauka Publ., 2012. 484 p. (in Russian).

6. Kudeyarov V. N., Bashkin V. N., Kudeyarova A. Yu., Bochkarev A. N. Ecological problems of fertilizer application. Moscow, Nauka Publ., 1984. 213 p. (in Russian).

7. Bulatkin G. A. Ecological and energy aspects of the productivity of agrocenoses. Pushchino, 1986. 209 p. (in Russian).

8. Pirogovskaya G. V. Applying, loss of plant nutrients in the system “precipitation - soil - fertilizer - plant”. Minsk, Belaruskaya navuka Publ., 2018. 227 p. (in Russian).

9. Gorbovskii K. G., Norov A. M., Malyavin A. S., Mikhailichenko A. I. Physical and chemical properties of urea-containing nitrogen-phosphorus-potassium fertilizers conditioned with magnesium salts. Khimicheskaya tekhnologiya, 2014, vol. 15, no. 2, pp. 70-74 (in Russian).

10. Gorbovskii K. G., Norov A. M., Malyavin A. S., Mikhailichenko A. I. Physical and chemical properties of complex balanced brands of NPK-fertilizers using urea. Khimicheskaya promyshlennost’ segodnya = Chemical Industry Today, 2013, no. 6, pp. 12-19 (in Russian).

11. Pirogovskaya G. V. The effect of mineral fertilizers with the addition of trace elements and plant growth regulators on the yield and quality of agricultural products. Pochvovedenie i agrokhimiya [Soil Science and Agrochemistry], 2013, no. 2, pp. 177-191 (in Russian).

12. Korostylev S. A., Gromova N. V., Grechishkina Yu. I. The impact of new brands of complex mineral fertilizers like NPK 21:1:21, 17:1:28, 19:4:19, 20:4:20, produced by “Nevynomyssky Azot”, on the yield of green mass of corn for silage on leached chernozem. Sovremennye resursosberegayushchie innovatsionnye tekhnologii vozdelyvaniya sel’skokhozyaistvennykh kul’tur v Severo-Kavkazskom federal’nom okruge: 77-ya ezhegodnaya nauchno-prakticheskaya konferentsiya, Stavropol’, 23-25 aprelya 2013 g. [Modern resource-saving innovative technologies of cultivation of agricultural crops in the Northern Caucasus federal area: the 77th annual scientific and practical conference, Stavropol, April 23-25, 2013]. Stavropol, 2013, pp. 54-57 (in Russian).

13. Akanova N. I., Sychev V. G., Vizirskaya M. M., Andreev A. A. On the benefits and effectiveness of using complex mineral fertilizer NPK=14-14-23. Niva Povolzh’ya = Volga Region Farmland, 2017, no. 4 (45), pp. 2-10 (in Russian).

14. Lazarev V. I., Aidiev A. Ya., Zolotareva I. A., Stifeev A. I., Shershneva O. M. The efficiency of micronutrient fertilizers in the conditions of the Kursk region. Kursk, Kursk State Agricultural Academy, 2013. 139 p. (in Russian).

15. Pirogovskaya G., Myslivets D. The economic efficiency of use of complex fertilizers with modifying additives in the technology of cultivation of carrots. Agrarnaya ekonomika = Agrarian Economics, 2013, no. 11, pp. 40-48 (in Russian).

16. Pirogovskaya G. V., Lapa V. V., Chernyakov D. V., Ermakovich N. N. Development, production and use of complex fertilizers in the agricultural sector of the Republic of Belarus. Pochvovedenie i agrokhimiya [Soil Science and Agrochemistry], 2018, no. 1 (60), pp. 87-107 (in Russian).