Influence of different densities and schemes of sowing on the size of leaves and net productivity of photosynthesis of spring rape plants | Влияние различной густоты и схемы посева на площадь листьев и чистую продуктивность фотосинтеза ярового рапса
2012
Tsyganov, A.R. | Klochkova, O.S. | Solomko, O.B., Belarus State Academy of Agriculture, Gorki (Belarus)
The most important condition for the high productivity of plantings is the consumption of large quantity of solar energy by plants. Process of photosynthesis directly influences growth and development of cultivars and the level of crop yield. Productivity of photosynthesis is evaluated with the help of total area of the leaves, growth of dry matter and longevity of inter-phase periods. Influence of different thickness of plantings and planting scheme on the size of leaves' area and pure productivity of photosynthesis on the example of spring rape (Brassica napus) is analyzed. The research shows that the largest size of leaves per m2 in the phase of flowering and the size of pods in the phase of green maturity are formed on average when the density of plants is 107 per m2. The size of leaves decreases when the distance between plants in rows increases. With the following planting schemes of 9.7 x 9.7 and 11,2 x 11,2 cm - 4.40 and 4.24 m2 /m2 large sizes of leaves are received. The highest result of photosynthesis net productivity is obtained when the density is 107 per m2 - 9.93 g/m2 per day. Photosynthesis net productivity increases with the decrease of the distance between plants in a row when the square of feeding is the same.
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