Recently carried out by the Shanxi Provincial Academy of Agricultural Sciences, Nanjing Agricultural University soil nutrient supply the intensity ratio fertilization theoretical methods research "results passed expert review. This research breakthroughs international "no longer has the additional chemical fertilizers to increase yield misunderstanding can be used to guide the improvement of chemical fertilizer technology, is expected to continue to increase food production.

At present, China's grain production has been achieved "Nine Lianzeng yield also was phased, step-type growth, but additional facilities unit fertilizer food increase the amount has been greatly reduced. Therefore, some experts believe that the potential for fertilizer production has reached the limit, additional chemical fertilizers can not increase production.

In this regard, the soil nutrient supply strength ratio fertilization theory method research project presenters Shanxi Provincial Academy of Agricultural Sciences researcher Chu Qinghe, fertilizer exposed the shortcomings of the current administration, not the fertilizer itself cause, but a lack of proper theoretical guidance for the application of the unscientific results.

By a large number of field experiments, Chu Qinghe crop production not only with fertilizer, more importantly, by the the fertilization proportion of constraints, different type of soil nutrients best fertilization ratio. Maximum fertilization exist for the same species, more than the maximum amount, more fertilization, not only can not increase production, but harmful. Only Naifei more new varieties, to ensure maximum fertilization rate is still more than the original varieties of a significant effect of increasing production.

Fertilization techniques established in accordance with this theory, he lower in the high nitrogen phosphorus, low phosphorus high nitrogen, high nitrogen and phosphorus double low and high nitrogen phosphorus hypokalemia different soil types on the planting of corn, wheat, rice, tobacco, potatoes and other crops fertilization experiments achieved a yield of about 30% of the effect.

Chinese Academy of Sciences FERTILITY The results can be used to guide agricultural production due to soil, as long as the sub-regional sampling given due to crop fertilization than quantitative determination of soil organic matter, nitrogen, available nitrogen and available potassium can grow crops divided the nutrient level of a combination of types, and to determine the best fertilizer ratio of N, P or NPK fertilization has important guiding significance of close planting high-yield fertilization.

The FERTILITY said, this achievement for our country to achieve a sustained food income, saving fertilizer, reduce greenhouse gas emissions to provide a scientific basis, fertilization and the marginal product, potassium appropriate conditions Phosphorus Composition reached the international advanced level.

Meanwhile, the reporter noted that Chu Qinghe people, field trials focused on the nine cities in Shanxi, and research for only two years, involving soil, climate, crop varieties and other relatively single, still need more geographical, longer time to be verified.