Potash fertilizer application method used in cooperation with wheat-corn crop rotation anniversary whole straw returning

Abstract

The invention relates to a potash fertilizer application method used in cooperation with wheat-corn crop rotation anniversary whole straw returning.The method mainly includes the steps of returning straw to the field after corn harvesting, sowing wheat seeds, applying fertilizer, sowing corn in a no-tillage mode after wheat straw is returned to the field and applying fertilizer, wherein under the condition that wheat and corn are at the high-yield level and in other words, the wheat yield is 400-600 kg / mu and the corn yield is 500-700 kg / mu and under the condition that all wheat straw and corn straw are returned to the field after grain harvesting, calculated as K2O, the anniversary potassium nutrient input is 9-13 kg / mu, the application amount of wheat season nutrients accounts for 27-45% of the anniversary amount, and the application amount of corn season potassium nutrients accounts for 55-73% of the anniversary amount.Returning of straw of crops of two seasons is fully considered, powerful potassium compensation is conducted on soil, the fertilizer application amount and the distribution ratio are determined according to potassium requirement rules of the two types of crops, potassium supply in different growth periods of the two types of crops is ensured, total amount regulation and control and staged planning and management are achieved, the method is effectively combined with cultivation and tillage measures, the potash fertilizer utilization rate is greatly increased, and potassium balance of the soil-crop system and sustainable utilization of lands are ensured.

Description

technical field [0001] The invention relates to a method for fertilizing wheat and corn, in particular to a potassium fertilizer application method for returning all stalks to the field in cooperation with winter wheat and summer corn in the Yellow-Huaihai-Hai region, which belongs to the technical field of agricultural fertilization. Background technique [0002] Winter wheat and summer corn are the main food crops in the Huang-Huai-Hai region, and the grain output in the Huang-Huai-Hai region occupies a pivotal position in the country. Therefore, it is of great significance to ensure the stable and increased production of wheat and corn in this region. In order to ensure the continuous and stable increase of grain production, a large amount of chemical fertilizers are used in production to promote the demand for nutrients. The large-scale application of chemical fertilizers not only causes an increase in energy consumption, a decrease in nutrient use efficiency, and a deter...

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Problems solved by technology

As another example, Chinese patent document 200910230076.2 discloses an integrated fertilization method under the condition of returning wheat and corn double crop straw to the field, which emphasizes more on the operation of nitrogen fertilizer, and does not provide a better explanation for the supplementary effect of potassium in the returning straw. It does not reflect a time effect that the process of straw returning to the field for potassium supplementation is affected by environmental factors

Under the current production conditions of wheat and corn twice a year, the application of potassium fertilizer does not take into account the potassium supplement brought by returning the straw to the field, but blindly follows the traditional practice (generally, the base fertilizer is applied at one time before the wheat is sown, and the corn is applied in one time). One-time application of compound fertilizer in the seed fertilizer or the first fertilization, and no topdressing of potassium fertilizer in the later stage), the distribution between crops and the efficient use of potassium nutrient were not considered in terms of quantity and method, because the input of potassium nutrient was not enough Like nitrogen and phosphorus, it will bring non-point source pollution. Its application is still determined according to the price of fertilizers. Therefore, it is still in the concept of fertilization that is dispensable and has no basis for application. Compared with the current fertilizer reduction and efficiency increase , energy conservation and emission reduction, and the concept of sustainable agricultural development are contrary to

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