Influence of long application of fertilizers on productivity of photosynthesis and productivity of spring whea

Abstract

The purpose. To determine influence of regular application of artificial fertilizers on the background of after-effect of muck in dose of 30 t/hectare on productivity of grain of regionized variety of spring wheat Mironovskaya Yaraya, and also on some physiologic processes in plants at growing on averagechernozem carbonate soil. Methods. They carried out field probes in grain-beet crop rotation, phenological observations and biometrical measurements of the square of a leaf area. Results. By probes on average-chernozem carbonate soil it is determined that long application of artificial fertilizers on the background of after-effect of organic ones ensures increase of grain yield of zoned cultivar of spring wheat Mironovskaya Yaraya for 1,62 t/hectare. The greatest index of pure productivity of photosynthesis makes 11,5 g/m2 for a day in alternative where they studied action of sesquilateral dose of artificial fertilizers on the background of after-effect of muck in dose of 30 t/hectare, and during most healthy growth of plants of spring wheat (compared with the supervisory control) — 7,45 g/m2. Conclusions. Importation of artificial fertilizers in different doses and ratios on the background of after-effect of muck in dose of 30 t/hectare increases productivity of grain of spring wheat cultivars Mironovskaya Yaraya for 0,51 – 1,62 t/hectare, at productivity in the supervisory control of 2,18 t/hectare. In all growth phases and development of plants of spring wheat the amount of dry matter in alternatives with use of fertilizer, exceeded its indexes in alternative without fertilizers (supervisory control). Optimum indexes of square of a leaf area of spring wheat of pure productivity of photosynthesis are determined in alternative where they studied action of sesquilateral dose of artificial fertilizers on the background of after-effect of muck in dose of 30 t/hectare.