Аграрный вестник Урала № 03 (145) 2016Агрономия
PHOTOSYNTHETIC ACTIVITY OF RHAPONTICUM CARTAMOIDES IN VARIOUS YEARS OF USE
This article describes the results of studies on the photosynthetic activity of Rhaponticum carthamoides – the new perspective culture in the Perm region in the herbage of the third and fifth years of use (2013 and 2015 respectively). Rhaponticum carthamoides – valuable useful plants with a variety of application – in medicine, fodder production, beekeeping, food industry, landscaping. It has a high forage and immunostimulatory properties. Researches were conducted on the experimental field of herbage of Perm Scientific Research Institute of Agriculture, created in 2010 in experiments with mineral fertilizers on a variant with entering N60P60K60.Photosynthesis – the main process of plant nutrition, and it is primarily and decisively determines the possibility of obtaining, and the size of the crop. The maximum leaf area of Rhaponticum carthamoides formed at the beginning of flowering. In the third year of use it has made 139.8 thousand m2/ha, in the fifth year – 181 thousand m2/ha. The photosynthetic potential increased from emergence to flowering, and reached the indicators in the III year of use 501.6–1398.0 thousand m2 per day/ha, in the V year of use 808.0–1448.0 thousand m2 per day/ha. Value of the net photosynthetic productivity in I hay crop reduced the growth and development of plants from 4.27 to 2.81 g/m2 and 3.72 to 0.99 g/m2 per day, respectively on the third and fifth year of use. The accumulation of dry mass in third year ranged from 107.18 to 772.41 g/м2, in the fifth year of use – from 150.38 to 526.72 g/м2.
Rhaponticum carthamoides, photosynthetic activity, net productivity of photosynthesis, leaf area.
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