Drop watering of rees on light brown soils of Volga hills

 
PIIS250026270001839-7-1
DOI10.31857/S250026270001839-7
Publication type Article
Status Published
Authors
Affiliation: All-Russian Research Institute of Irrigated Agriculture
Address: Russian Federation
Affiliation: Russian State Agrarian University – Moscow agricultural Academy im. K. A. Timiryazev
Address: Russian Federation, Moscow
Affiliation: All-Russian Research Institute of Irrigated Agriculture
Address: Russian Federation
Affiliation: All-Russian Research Institute of Irrigated Agriculture
Address: Russian Federation
Affiliation: All-Russian Research Institute of Irrigated Agriculture
Address: Russian Federation
Affiliation: All-Russian Research Institute of Irrigated Agriculture
Address: Russian Federation
Journal nameRossiiskaia selskokhoziaistvennaia nauka
EditionNumber 6
Pages42-44
Abstract

The results of researches connected with cultivation of rice on the systems of drop irrigation, providing to polucheniye vysoky profitability due to considerable decrease in irrigating norms are presented. It is established that dlya uspeshny development of the recommended innovative vodosberegayushchey tekhnologiya of irrigation of rice without creation of a sheet of water existence aerobic or tolerant to nonsaturated water of pochvesort, placement of crops on the fields cleared of weed vegetation and use if necessary, the complex system of protection of crops against weeds, an optimalnoye sochetaniye of the water mode of the soil with the doses of application of fertilizers calculated on obtaining the planned productivity is necessary. I have proved as the most rational water mode option where the humidity of the soil was maintained not lower than 80% Fc of crops until the end of a kushcheniye phase in a layer of 0,4 m with the subsequent increase him up to 0,6 m. In a phase of the beginning of wax ripeness of grain in connection with decrease in average daily water consumption of plants the preirrigation threshold of humidity of the soil should be reduced from 80 to 70% Fc. Maintenance of the water mode of the soil according to such scheme on the systems of drop irrigation in years, different in the sum and distribution of rainfall, in the conditions of Lower Volga area requires carrying out from 13 to 16 waterings among which 2 - 5 waterings by norm of 250 m3/ha, 8 - 10 - norm of 370 m3/ha and 1 - norm of 550 m3/ha. The combination of such water mode to a dose of application of fertilizers of N P K provides productivity of rice at the level of 5.0 t/ha with excess on average in three years for 2.6%, 109 62 75 against the background of N P K – 6.0 t/ha with excess for 1.8% and a dose of N P K – 7.0 t/ha with a shortage to the planned 131 74 90 157 90 108 level for 1.9%.

Keywordsrice, productivity,water mode, regulations of waterings, drop irrigation, water consumption, mineral fertilizers
Received18.12.2018
Publication date18.12.2018
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