Abstract:

In order to scientific and reasonable fertilization, promoting sustainable development of agriculture, this study on the basis of indoor analysis, plot experiments and nutrient rapidly measure technique, spring corn anticipant objective yield, the absorbed nutrient quantities of 100 kg corn grain yield, soil providing nutrient quantities, the ratio of fertilizer utilization in meadow black soil and corrected coefficient of soil effective nutrient were systematically studied. The results showed that, in the meadow black soil the spring corn anticipant objective yield was 9945 kg/hm2, the absorbed nutrient quantities of 100 kg corn grain yield was N 2.27 kg, P2O5 0.88 kg, K2O 2.01 kg. Soil providing nutrient quantities was N 212.4 kg/hm2, P2O5 81.4 kg/hm2, K2O 209.9 kg/hm2. Corrected coefficient of soil effective nutrient was N 0.49, P2O5 1.20, K2O 0.37, but the ratio of fertilizer utilization was N fertilizer 27.8%, P fertilizer 10.8%, K fertilizer 20.6%. So the parameter of testing soil nutrient and recommending fertilizer utilization quantities was pivotal factor in fixing on fertilizer utilization by testing soil and recommending fertilizer. This parameter affected by soil fertility and climate factor, etc. This parameter might apply in the same soil for a long time by checkout of plot experiment. We had weighed up the spring corn yield by there years corn yield before is comparative scientific reasonable.