Impact of zero tillage system on the nutrient content of grain and vegetative parts of cereals

摘要: Evaluating differences in mineral composition of cereal crops grown zero and conventional tillage systems have been performed with the use results experiments carried out experimental stations IUNG-PIB JelczLaskowice, near Wroclaw (years 2002–2009) Baborowko Poznan (2007–2009). The study covered various one-year with: winter wheat (9 experiments), maize (4 exp.), spring barley (3 oats exp.). Conventional consisted a group post-harvest operations to depth 10–15 cm, then pre-plant plowing 25 cm sowing cultivation an active harrow. Zero was without using any mechanical tillage, mulching soil surface shredded straw. plant samples were analyzed for contents N P by fl ow absorption spectrophotometry, K – ame emission spectrometry Ca, Mg, Cu, Mn Zn AAS. Also content so-called indicator parts collected during growing season evaluated acc. Bergmann values, determine if there shortages elements earlier phases development, which could affect grain. In available determined Egner-Riehm method, Mg Schachtschabel method organic carbon Tiurin method. evaluation signifi cance between studied farming grain biomass based on analysis variance two independent Tukey test (P<0.05). Growing cereals systems, conditions light soils, did not cause concentration macro-and micronutrients plants at beginning vegetation, nor it bring about deterioration quality terms primary minerals, is important assessing its value as feed or foodstuff. key words: zero-tillage system, cereals, maize, nutrient Impact system vegetative