Adjustment of water demand norms for accompanying crops in rice crop rotations
Abstract
The relevance of the study is due to the need to save water resources. The purpose of study is to determine microclimatic correction factors for monitoring and adjusting the norms of water de-mand for accompanying crops in rice crop rotations for various zones of natural moistening in Russia. The main study methods are experimental (field) and comparative analysis of the data obtained with theoretical calculations. Study results: Correction factors are presented for calcu-lating evapotranspiration / evaporation of accompanying crops in rice crop rotations, varying in the regions of Russia from Ccr= 0.75 to Ccr = 0.94, respectively, at from Cm 0.2-0.3 to Cm 0.8-1.0 and it is determined that in the rice crop rotation it is necessary to take into account the residual additional productive moisture reserves after rice, which is in the meter soil layer - from 60 mm in regions with Cm = 0.2-0.3 to 84 mm with Cm 0.8-0.1. Practical significance: The use of micro-climatic correction factors for adjusting the norms of water demand for accompanying crops makes it possible to calculate and justify the volume of water for irrigation of these crops in rice crop rotations and to save water resources. KEYWORDS: water; crops, agricultural products, rice; irrigation.
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References
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