Improvement of the hose sprinkler when watering seedlings of vegetable crops grown by the cassette method in closed ground

The article notes that at present, for watering cassette seedlings in greenhouses, the DSh-0.6 positional hose sprinkler, improved for indoor conditions, is widely used. The improvement of the sprinkler consists in the replacement of sector-acting end nozzles with circular nozzles, determined by a decrease in its radius of action, due to the limited width of a typical greenhouse module (9 m). The purpose of the study: to improve the quality of irrigation of seedlings of vegetable crops grown by the cassette method in protected soil by improving the hose sprinkler. In the course of theoretical studies, based on the design parameters of the sprinkler wings of the hose sprinkler and the width of the greenhouse module, it was found that the nozzles are arranged in such a way as to ensure that the rain torches overlap as much as possible from the circular and sector nozzles and, the latter, in the middle of the greenhouse, with each other. In this case, the distance a from the attachment point of the sector action nozzles to the attachment point of the circular action nozzles, determined by expression 1, should be about 0.80 m. To assess the effectiveness of irrigation, using the well-known technique described in SRT AIST 11.1-2010, it was found that the effective irrigation coefficient for a circular irrigated area is about 0.75, and for a square one, taking into account non-irrigated areas, no more than 0.60, which can be increased by overlapping adjacent positions when watering. When analyzing the graph analytical dependence, it was found that, with overlap equal to 0.5d, the non-spilled area is about 20 m2, versus 9.5 m2 and 4.8 m2, respectively, with overlap equal to 0.6d and 0.7d. At the same time, the irrigation efficiency coefficient increases from a value equal to 0.60 without overlap to 0.75 with an overlap of 0.7d. As a result of the research, the operational performance of the sprinkler system was obtained, which allowed us to draw the following conclusions: to ensure effective irrigation of seedlings of vegetable crops grown by the cassette method in an enclosed ground with a hose sprinkler, it is necessary: to ensure the distance between circular and sectoral nozzles equal to 0.80 m; to change the position when overlapping at least 0.7 of the diameter of the irrigated circular squares.

1. Copyright certifi cate No. 1804289 of the USSR, IPC a01g 25/09. Sprinkler system: No. 4944609: application. 13.06.1991: published. 23.03.1993 / A.G. Nikitin, A.I. Ryazantsev; applicant All-Union Scientifi c and Production Association for the mechanization of production “Rainbow”.

2. Bolkhoroev Ya.K. Mechanization of labor-intensive processes in protected soil. In the book: Protected soil vegetable growing. Moscow: Agropromizdat, 2000. P. 57-64.

3. Vashchenko S.F., Chekunova Z.M. and others. protected soil vegetable growing. Moscow, Kolos, 1984. 341 p.

4. Gailitis M. Growing cabbage seedlings in fi lm structures // Potatoes and vegetables. 1973. No. 4. P. 31-34.

5. Egorova N.N. technology and mechanization of growing cassettes in protected soil seedlings of vegetable crops: dissertation… Candidate of Technical Sciences: 05.20.01. Ryazan, 2003. 160 p.: ill.

6. Evseev E.Y. improving the productivity of a multifunctional circular machine on slopes / E.Y. Evseev, A.I. Ryazantsev // Bulletin of the Ryazan State Agrotechnological University named after P.A. Kostychev. 2023. Vol. 15, No. 4. P. 121-127.

7. Evseev E.Yu. improving the effi ciency of using a multifunctional machine on sloping areas / E.Yu. Evseev // Field of the Volga region. 2023. № 2(66).

8. Investigation of the trajectories of sprinkler drops / G.K. Rembalovich, A.I. Ryazantsev, M.Yu. Kostenko [et al.] // Bulletin of the Ryazan State Agrotechnological University named after P.A. Kostychev. 2018. No. 4(40). P. 138-142.

9. Patent No. 2672313 C2 of the Russian Federation, IPC A01g 25/02. Sprinkler system: No. 2017109826: application 24.03.2017: published 13.11.2018 / A.I. Ryazantsev, G.V. Olgarenko, N.A. Mishchenko [and others]; applicant Federal State Budgetary Scientifi c Institution “All-Russian Scientifi c Research Institute of Irrigation and Agricultural Supply Systems “Raduga” (FSBI VNII “Raduga”).

10. Utility Model Patent No. 187870 U1 Russian Federation, IPC a01g 25/09. Sprinkler system for watering cassette seedlings in a greenhouse: No. 2018133057: application 17.09.2018: published 21.03.2019 / A.I. Ryazantsev, V.S. Travkin, G.K. Rembalovich [and others]; applicant Federal State Budgetary Educational Institution of Higher Education “Ryazan State Agrotechnological University named after P.A. Kostychev” (FSBEI Voalatu). EDN DNIXFN.

11. Utility Model Patent No. 189319 U1 Russian Federation, IPC a01g 25/00. Sprinkler system for greenhouses: No. 2018119609: application. 05/28/2018: published. 05/21/2019 / A.I. Ryazantsev, V.S. Travkin, G.K. Rembalovich [and others]; applicant Federal State Budgetary Educational Institution of Higher Education “Ryazan State Agrotechnological University named after P.A. Kostychev” (FSBEI Voalatu).

12. Nino T.P. 14. RD-AP 1. 10. 09. 01-14. Methodological recommendations on the technological design of greenhouses and greenhouse plants for growing vegetables and seedlings: RD-APK 1. 10. 09. 01-14 / Vinogradov P.N. Moscow: Rosinformagrotech, 2014. III, 103 p. (System of recommendation documents of the agro-industrial complex of the Ministry of Agriculture of the Russian Federation). // Engineering and technical support of the agro-industrial complex. Abstract Journal, 2015, No. 1, p. 14.

13. Utility Model Patent No. 211759 U1 Russian Federation, IPC a01g 25/00. Sprinkler system: No. 2022102621: application no. 02/03/2022: published 06/21/2022 / A.I. Ryazantsev, S.S. Turapin, Zh.K. Leonova [et al.]; applicant Federal State Budgetary Scientific Institution All-Russian Scientifi c Research Institute of Irrigation Systems and Agricultural Water Supply “Raduga”.

14. Sprinkler machines and installations. Methods for assessing the functional indicators of SRT aist 11.1 2010. 56 p.

15. Recommendations on the use of a low-pressure sprinkler for irrigation of vegetable seedlings: methodological recommendations / N.V. Byshov, S.N. Borychev, A.I. Ryazantsev, G.K. Rembalovich, L.N. Lazutkina M.Yu. Kostenko, R.V. Beznosyuk [et al.]. Ryazan: FSBEI voyazatu, 2018. 30 p.

16. Ryazantsev A.I.. sprinkler system for irrigation of cassette seedlings of vegetable crops in closed ground / A.I. Ryazantsev, N.N. Egorova, N.Ya. Kirilenko // Bulletin of Saratov State Agrarian University named after I. Vavilov. 2013. No. 3. P. 48-51.

17. Ryazantsev A.I. Mechanization of irrigation of vegetable crops in protected ground: a textbook for students of agricultural universities and students of educational institutions of additional professional education studying under the curriculum “land reclamation, reclamation and protection of land” / A.I. Ryazantsev, N.N. Egorova. Kolomna, 2007. 143 p. ISBN 978-5-91205-010-7.