Аграрный вестник Урала № 10 (128) 2014Агрономия
Influence of the level of mineral nutrition on chlorophyll fluorescence of maize
The results of studies on the effect level of mineral nutrition on chlorophyll fluorescence of maize. Observations made in the laboratory on cut plants in the most intensive phase of growth and in the ejection phase panicles. Registration of the fluorescence was carried out on July third bottom and third from the top August leaves. Statistical analysis shows that the despite the small difference between the options of mineral fertilizers in the conditions of the experiment significantly increased photosynthetic activity of maize chlorophyll. Special attention should be paid to the formation of organic matter and crop formation. Data on the productivity of maize were at different levels of mineral nutrition given. Thus there was a significant increase in productivity of corn. Gathering her dry matter increased by 43 %, while the yield of green mass by 24 %. Higher rate of growth of dry matter were explained by the fact that when the fertilizer was a significant increase in dry matter content in the green mass of corn. Comparison of data on the effect of mineral nutrition on the activity rate of chlorophyll and productivity of maize shows that the level of increase maize yields in fertilizer significantly higher than the increase in photosynthetic activity of chlorophyll. There is speculation that it could occur in the following circumstances: fertilizers have little influence on the process of photosynthesis, which cause the appearance of the fluorescence effect, but may increase the efficiency of the photosynthetic system at later stages; fertilizers have little influence on the process of photosynthesis, which cause the appearance of the fluorescence effect, but significantly change the direction of the products of photosynthesis by plants. Increasing productivity is the result of redistribution of the products of photosynthesis in favor of the above-ground mass.
maize, chlorophyll, photosynthesis, fluorescence, mineral fertilizers
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