Study of reducing the amount of using fertilizer in corn growth

The result of reducing the amount of using fertilizer (N180 kg/hm2, P2O5 kg/hm2) is evident, in the amount of using fertilizer to corn regions of Tong Hua JiLin every year In 1999, in the darkbrown soil, the nitrogen which reduced 23 kg/hm2 (the actual amount was 150 kg/hm2), The yield increased 10%, compared with using the high amount of nitrogen In 2001 and 2002 in the alluvial soil and the whitestarch soil, the amount of nitrogen reduced 36 kg/hm2 (the actual amount was 144 kg/hm2 ) The yield increased 565% in 2001 and 256% in 2002, compared with using the high amount of nitrogen In 1995, in the whitestarch soil and the darkbrown soilthe amount of using phosphorous was between 366-918 kg/hm2 The yield of corn wasn't differences That result show that using high amount or low amount of phosphorous wasn't difference Reducing the amount of using fertilizer to corn growth is available It can reduce the cost and increase incomeCorn growth which needs the amount of nitrogen 140～150 kg/hm2 Using the amount of phosphorous 35～45 kg/hm2 in the eastern regions of Jinlin Province