Screening method of multiple cropping corn fertilizing mode

Abstract

The invention belongs to the technical field of agricultural fertilizing, and discloses a screening method of a multiple cropping corn fertilizing mode. The method comprises the following steps: applying fertilizer respectively at the several growth stages of corn such as the early stage of sowing, the jointing stage, the flare opening stage and the heading stage, counting the corn biological characters such as the symptoms of the corn leaves, the plant height, the characters of panicle and the hundred-grain weight and thus screening out the local fertilizer applying mode. According to the method, experiments of the corn fertilizer applying modes are carried out continuously in a representative field in three years, three fertilizer applying modes are set, fertilizer is applied respectively at the several growth stages of corn such as the early stage of sowing, the jointing stage, the flare opening stage and the heading stage, the corn biological characters such as the symptoms of the corn leaves, the plant height, the characters of panicle and the hundred-grain weight are counted and thus the local fertilizer applying mode is screened out. A theoretical foundation is laid for scientific fertilization, a typical demonstration is carried out, and thus the continuous high yield of the corn is promoted by gradually popularizing the scientific local fertilizer applying mode.

Description

Technical field [0001] The invention belongs to the technical field of agricultural fertilization, and in particular relates to a method for screening fertilization methods for multiple seeding corn. Background technique [0002] Corn is an important food crop in the world. It is widely planted in more than 120 countries including China, the United States, and Brazil, with a cumulative germplasm area close to 100 million hectares. As an important corn producing country, China is divided into spring sowing corn area in the north, Huanghuaihai summer sowing corn area, southwest mountain corn area, southern hilly corn area, northwest irrigated corn area, and Qinghai-Tibet Plateau corn area according to geographical location. Six districts. Shanxi is located in the Loess Plateau, straddling two corn planting areas. The north central and southeastern areas belong to the northern spring corn area, and the central and southern areas belong to the Huanghuaihai summer corn area. Corn is...

AI Technical Summary

Problems solved by technology

[0004] To sum up, the problems existing in the prior art are: in the existing fertilization process, there is a lack of consideration of regionality, seasonality, and stage of corn growth, and the level of fertilization is not good in terms of the demand for nutrients from corn growth; On the one hand, fertilization has been overly dependent on chemical fertilizers, and the amount of organic fertilizers is less; on the other hand, the ratio of nitrogen, phosphorus, and potassium fertilizers is extremely unreasonable, and the amount of phosphorus and potassium fertilizers is seriously insufficient; resulting in corn lodging rate and stem rot High morbidity and weak output, quality and market competitiveness

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