Response of quantity and quality traits of forage maize to macroelements and zinc in the current agricultural and ecological systems

In order to evaluate response of quantity and quality traits of forage maize to macroelements and zinc in the common agricultural and ecological systems, an experimental carried out as split plot design a randomized complete block with four replications in the village of Qara-Chai that khondab city located. The main plots included in organic and chemical fertilizer treatments at six levels: 100, 75 and 50% NPK fertilizer recommended by the laboratory, 75% NPK fertilizers 10 t/ha manure, 50% fertilizers NPK 25 t/ha manure, 40 t/ha of manure, and subplots sprayed with different concentrations of zinc sulfate in three of control (no spray), sprayed with zinc sulphate two and four per thousand. Results showed that maximum forage yield 92291 kg/ha was recorded from 40 t/ha manure that with 75% NPK fertilizers combined with application of 10 t/ha manure with forage yield equal to 88845 kg/ha was no significant difference. The foliar application of zinc at a concentration of 4 per thousand, the highest yield (87379 kg/ha) were produced. The highest protein content (12.59 %) was obtained from treatment 40 t/ha of manure. The foliar application of zinc sulfate at concentration of 4 per thousand showed that highest protein content (18.73%). foliar application of two and four per thousand zinc sulfate concentrations increased the grain yield by 8, 9 and 23.08 % compared to the control. The maximum of zinc concentration (47.13 mg/kg) was recorded from application of zincsulfate at the rate of 4 per thousand. In general, results showed that application of 75% NPK recommended combined with 10% t/ha manure along with foliar application of 4 per thousand zinc sulfate can obtain good quantitative and qualitative yield.