Effect on Yield Components of Maize under Combined Application Mineral Organic Fertilizer with Chemical Fertilizer in Hexi Corridor Oasis Irrigation Area

The effects on the yield components of maize under combined application mineral organic fertilizer with chemical fertilizer in Hexi corridor oasis irrigation area were studied. The results showed that application of mineral organic fertilizer improved biomass, grain yield and contribution rate of fertilizer significantly. Under the condition of combing application mineral organic fertilizer to 750 kg/ha, the treatments of application chemical fertilizer reduced 0 and 15% to local optimal fertilization treatments. The biomass and grain yields were 38 647, 36 869 kg/ha and 16 544, 15 783 kg/ha, respectively, which increased 7.61%, 2.66% and 7.56%, 2.48% respectively by the mere application of chemical fertilizer. The contribution rate of fertilizer were 56.26% and 49.07%, which were superior to application of chemical fertilizer 11.05 and 3.87 percentage respectively. The results had proved that it was viable to keep the grain yield of maize at the high yield level by reducing application amount of chemical fertilizer nitrogen and phosphorous by 15% when combing the application mineral organic fertilizer 750 kg/ha.