Analysis of soil moisture consumption during the cultivation of spring rape in 2021 in the zonal region of the Altai territory

The article presents the results of measuring soil moisture with the HH2 Delta-T Devices device during the experiments of growing spring rapeseed of the variety “Rapul Curie” with the use of fertilizers in bogharic agriculture. The experimental plots were laid in the Zonal area of the Altai Territory in 2021. At the time of sowing the crop, the moisture reserves in the meter layer of soil corresponded to the average values. According to the periods of plant development and the variants of experiments, the moisture consumption from the meter layer of soil differed. The average moisture consumption over the growing season was estimated. During germination, this indicator reached 1.58 mm / day, during budding and flowering 5.54 mm/day. Precipitation at the stage of flowering, podding and the beginning of green ripeness allowed the plant to consume moisture on average from 4.99 to 7.16 mm/ day. At the stage of wax ripeness, the average moisture consumption decreased to 3.96 mm/day, and in the phase of full ripeness - to 0.76 mm/day, which was due to the almost absence of precipitation in the last 2 decades of August. The maximum biological yield of 32.3 c/ha was obtained in the application of fertilizers No. 4 (APAVIVA PK (S)20:20(5)+20CaO) and No. 2 (APAVIVA NP (S)16:20(12)) with minimum moisture consumption coefficients of 119.1 and 129.2 mm/t, respectively. Variants 4 and 2 also had the minimal moisture consumption at all phases of vegetation.