Safflower Productivity Depending on Seed Treatment by Akm Plant Growth Regulator and Level of Mineral Nutrition

Abstract

Extremely uneven distribution of moisture during the growing season dramatically increases not only the risk of safflower seeds yield reduction, but its quality as well. One of the main reserves of solving this problem is the dose of fertilizers, particularly nitrogen, and use of plant growth regulators (PGRs) in the critical phases of plant development. It is the optimum combination of these factors that is a significant reserve for increasing yield stability and quality of safflower seeds. The aim of the research was to identify the impact of AKM PGR on productivity of safflower plants at different levels of mineral fertilization. The results of the study on the impact of the AKM plant growth regulator on growth, development and yield formation of safflower in low moisture conditions of Southern Steppe of Ukraine are presented. Optimal concentration of AKM PGR (0.0015 g/l) was determined. Seeds, processed by AKM PGR, had laboratory germination 5.7 % higher than in the control. In 2016, the safflower plant height for all variants was higher than this figure in the other years of the study. This is because HTC in 2016 for the period BBCH 00-39 was higher than in 2015 by 1.4 times. Therefore 1 anthodium formed on average 13.2 to 21.6 seeds. AKM PGR increased, compared to control, both weight of seeds in 1 anthodium, and the number of anthodia during the study years, thanks to antistress properties of AKM. This preparation significantly affected yield only in unfavourable years, and the impact of fertilizers was insignificant. The AKM plant growth regulator is recommended for the use on safflower in 0.0015 g/l concentration.

Morphological Features of Plants and Yield of Sunflower Hybrids Cultivated in the Northern Part of the Forest-Steppe of Ukraine

“…A feature of the soil-climatic zone of the Steppe of Ukraine, where sunflower is mainly grown, is an insufficient amount of precipitation with a significant potential of solar energy. Due to such natural features, almost every year there is an acute shortage of soil moisture, which prevents the planned level of yield [9]. With high plowing levels of soils and oversaturation of crop rotations by sunflower, specific diseases and pests are spread.…”

The Impact of Nutrition Optimization on Crop Yield of Winter Wheat Varieties (Triticum Aestivum L.) and Modeling of Regularities of Its Dependence on Structure Indicators

“…The use of plant growth-regulating drugs on winter wheat and other crops is a common practice (Panfilova and Gamayunova, 2018;Yeremenko et al, 2018). Thus, in the UK, the use of plant growth-regulating drugs in the spring vegetation period contributed to the growth of grain yield by 4 t / ha, compared with the natural background (Griffin and Hollis, 2017 ).…”