| Whether the application of fertilizers is reasonable or not depends not only on whether the crop yield and quality can be improved,but also on the material cycle and energy cycle in the ecosystem.Fertilizer utilization is an important indicator of whether fertilizer application is reasonable.Soil testing and formula fertilization is currently widely accepted in the world,and is recognized as a more advanced,scientific and scientific fertilization method.The purpose of increasing fertilizer use efficiency,crop yield,improving the quality of agricultural products,reducing fertilizer use,saving labor and expenditure,and increasing the income of growers.The purpose of this study is to promote the improvement of rice yield,increase soil fertility and protect the ecological environment of rice fields,and reduce runoff,leakage,and volatilization losses of nutrients such as nitrogen,phosphorus,and potassium.In this experiment,nitrogen,phosphorus and potassium were set in 2016 and 2017.There were 4 levels for each factor,and a total of 14 treatments.Dongming Township（Dawn Village,Hongguang Village）and Luobei County,Luobei County,Hegang City,Heilongjiang Province The town（Fenduo Village and Yunshan Village）conducted research on NPK accumulation,harvest index,apparent utilization rate,agronomic efficiency,and other indicators.The rice yield was determined and the equation of effect of NPK fertilizer on rice was established.Fertilizing formula,the specific findings are as follows:1.Under the conditions of this experiment,the grain yields of rice in 2016 and 2017 were measured.The rice yields in the two-year results were treated with nitrogen,phosphorus and potassium at 258.8 kg/hm2,36 kg/hm2 and 90 kg/hm2,respectively.The highest combination（N3P2K2）.This shows that the local can use this combination for reasonable fertilization.2.The content of nitrogen,phosphorus and potassium absorbed by grain during the two years was measured and analyzed.It was found that each grain produced in 2016 needs to absorb N:1.45kg,P2O5:0.74 kg and K2O:3.2 kg;in 2017,it needs to produce 100kg of grain.Absorption N:1.34kg,P2O5:0.70 kg,K2O:3.13 kg.Using the fertilizer effect equation,it was concluded that the highest yields of P2O5 and K2O fertilizers in the area were 41.7 kg/hm2 and 102.6 kg/hm2,respectively.3.For each treatment in this experiment,whether the increase in production,while saving labor and expenditure,the rice economic benefits of the various fertilizers were studied and it was concluded that the two-year results show that the economic benefits of using phosphorus fertilizer is higher than that of nitrogen fertilizer.Economic benefits,and potassium fertilizer has the lowest income increase effect. |
