Ear-controlling, grain-increasing and seed-toughening efficient fertilization method of large-ear type ultrahigh-yield rice variety

Abstract

The invention provides an ear-controlling, grain-increasing and seed-toughening efficient fertilization method of a large-ear type ultrahigh-yield rice variety. Under a condition of fertilizing soil fertility, fertilizers including pure nitrogen N, potassium oxide K2O and phosphorus pentoxide P2O5 are used as ear fertilizers and are applied to a rice field in one step in a young ear differentiation initial stage, namely an elongation stage; and a fertilization amount is determined according to pre-set total glumous flower quantity and thousand seed weight. According to the method, the dosage of chemical fertilizers is greatly reduced, the ineffective tillering growth is controlled, grains are increased, seeds are toughened and large ears are facilitated; and the strength of base internode and stems is improved, lodging is avoided, and the grain plumpness and the rice quality are improved.

Description

technical field [0001] The invention belongs to the technical field of rice fertilization, and in particular relates to a high-efficiency fertilization method for rice varieties with large panicle type and super high yield by controlling panicle, increasing grain and strengthening seeds. Background technique [0002] In recent years, Chinese breeders have bred a large number of new super-high-yielding rice varieties with large panicle type (such as Y Liangyou 900, Chaoyou 1000, etc.) with moderate tillering, straight flag leaves, short and medium-high plants, and tough stems that resist lodging. The yield has repeatedly hit new highs. In 2001, 2004, and 2011, the first, second, and third phases of China's super rice breeding targets of 700kg, 800kg, and 900kg per mu were achieved, and in 2014, the yield of 1026.7kg per mu was achieved in the demonstration of 100-mu slices. major breakthrough. However, these ultra-high-yielding varieties are all large-panicle varieties, and ...

AI Technical Summary

Problems solved by technology

[0003] Practice has proved that this kind of large-panicle super-high-yielding rice variety consumes a lot of fertilizer. To maximize its production capacity, in addition to applying organic fertilizers to fertilize the soil, it also needs 24-25kg of pure nitrogen, 10-12kg of P 2 o 5 , 25‐26kgK 2 O, resulting in thick canopy, vulnerable to pests and diseases, and poor inter-regional and annual production stability

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