Recently, the results of the “Study on the Methods of Soil Nutrient Supply Strength and Proportional Fertilization Theory†carried out by the Shanxi Academy of Agricultural Sciences and Nanjing Agricultural University successfully passed the expert review. This research has broken through the misunderstanding of the international “addition of fertilizers no longer have the effect of increasing productionâ€, which can be used to guide the improvement of fertilizer application technology and is expected to continue to increase food production.
At present, some experts believe that the production potential of fertilizer has reached the limit, and the application of chemical fertilizers will not increase production. In this regard, the project host and researcher of Shanxi Academy of Agricultural Sciences, Qi Qinghe, found through a large number of field experiments that the yield of crops is not only related to the amount of fertilizer applied, but more importantly, it is restricted by the proportion of fertilization, and the soil nutrient types are the best. Fertilization ratio. At the same time, for the same variety, there is the maximum amount of fertilizer applied. If this amount is exceeded, more fertilization will not increase the yield, but it will be harmful.
According to the fertilization technique established by the theory, he planted corn (2421, -5.00, -0.21%) and wheat on different soil types such as low nitrogen and high phosphorus, low phosphorus and high nitrogen, low nitrogen and phosphorus, and high phosphorus and low potassium. (2539, -16.00, -0.63%), rice, tobacco, potatoes and other crops have all achieved an effect of increasing production by about 30%.
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