The Effects of Long- term Application of Organic and Inorganic Fertilizer on the Amount of Nitrogen, Phosphor and Potassium and Growth Characteristics of Wheat

For investigate the effects of applying three and five continuous periods of municipal solid waste (MSW) and vermicompost (VC) with and without chemical fertilizer (CF) on the amount of nitrogen (N), phosphor (P) and potassium (K) and some growth characteristics of wheat (Triticum aestivum line N-8118), a pot experiment was conducted in split plot based on randomized complete block design with four replications. The main plots, was ten fertilizer levels including: control (without MSW and CF), chemical fertilizer based on soil test, 4 levels of MSW and 4 levels of VC (20 and 40 ton.ha-1 without and with half of CF) and sub plots are applying 3 and 5 continuous periods of fertilizers. Results showed that, concentration of leaf N, P and K and also, height, number of tillers, leaf surface and amount of chlorophylls (a and a+b) of plant in booting with applying MSW and VC caused significant increasing compared to control. The highest amount of leaf area was resulted with applying 5 continuous periods of 20 ton MSW with half of CF, the maximum amount of chlorophylls (a, b, total and SPAD), number of tillers and leaf nitrogen content with application 40 ton VC enriched with half fertilizer and also, the maximum amount of P and K accumulated in leaf in 40 ton MSW enriched with half fertilizer treatment. Meanwhile, concentration of P and K, flag leaf and content of leaf chlorophyll (a and a+b) increased with increasing fertilizer use periods from 3 to 5. Therefore, it can be concluded that applying organic fertilizers especially composted form would have, useful effects on plant growth and increasing the concentration of N, P and K of wheat leaf.