Effect of phosphorus and potassium nutrition background on yield and sowing qualities of industrial hemp under the steppe conditions of the south of Central Siberia

Abstract

The dependence of the yield and sowing qualities of industrial hemp seeds on phosphorus and potassium nutrition background in a four-factor field experiment was studied. The experiments were conducted in the steppe zone of the south of Central Siberia. The direct effect of the “nutrition background” factor on variability was low; the contribution of the factor to the total variability of the factor made 3% only. Against the phosphorus and potassium background of mineral nutrition, the seed yield was higher in all studied varieties. In general, in the experiment, the average yield against increased phosphorus and potassium nutrition background was 0.64 t ha, and in the control - 0.58 t ha. In general, in the experiment, the variety Vera increased the yield by 0.075 t ha against increased mineral nutrition background; the variety Nadezhda - by 0.07 t ha; the variety Mariya - by 0.04 t ha; and the variety Omegadar 1 - by 0.05 t ha. In general, in the experiment, against the background of phosphorus and potassium nutrition, the thousand-seed weight increased by 0.8 g as compared to the control. The phosphorus and potassium nutrition background determined the total variability of laboratory germination by 7%. In the control, the average germination of seeds of 4 varieties in two zones during 3 years of testing was 76.2%; against phosphorus and potassium nutrition background - 79.0%. Based on the conducted research, it may be concluded that the increased phosphorus and potassium nutrition background increased thousand-seed weight and seed laboratory germination. This makes it more likely to obtain high-quality seed material under extreme growing conditions which are formed in the steppe zone of the left bank of the Minusinsk Basin.