Effects of Partial Replacement of Chemical Fertilizers with Different Organic Fertilizers on Growth Dynamics and Grain Yield of Seed Corn in Hexi Oasis

In order to reveal effects of different commercial organic fertilizers and chemical fertilizers on the plant height，stem diameter，leaf area，dry matter and yield of seed production corn，a field test of seed production corn was carried out in Hexi Oasis.One control and six treatments were set up，namely CK（local conventional fertilization），T1（commercial organic fertilizer“Xingshuo”2 500 kg/hm2+chemical fertilizer reduction 20%），T2（commercial organic fertilizer“Xingshuo”2 500 kg/hm2+chemical fertilizer reduction by 40%），T3（commercial organic fertilizer“Silu Shengfeng”2 500 kg/hm2+chemical fertilizer reduction by 20%），T4（commercial organic fertilizer“Silu Shengfeng”2 500 kg/hm2+chemical fertilizer reduction by 40%），T5（commercial organic fertilizer“Sanshengyuan”2 500 kg/hm2+chemical fertilizer reduction 20%）and T6（commercial organic fertilizer“Sanshengyuan”2 500 kg/hm2+chemical fertilizer reduction 40%）.Test results showed that under condition of 2 500 kg/hm2 of commercial organic fertilizer，treatment of reducing fertilizer by 20% could promote growth and development of seed production corn and dry matter accumulation.Plant height，stem diameter，leaf area and dry matter of T1 treatment at maturity stage increased significantly 4.38%，10.86%，10.85% and 10.01% compared with CK.Dry matter accumulation of T3 and T5 treatments increased by 3.09% and 3.53% compared with CK respectively.Corn grain yield of T1 and T3 treatments significantly increased by 11.25% and 9.28% compared with CK.Therefore，treatment of 20% reduction in chemical fertilizer under condition of applying commercial organic fertilizer 2 500 kg/hm2 was more beneficial to growth and development of seed production corn，and it could be used as feasible organic fertilizer combined application method in cultivation of seed corn production in Hexi Oasis.