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

A fertilization method and ultra-high-yield technology, applied in fertilization methods, fertilization devices, applications, etc., can solve problems such as susceptibility to diseases and insect pests, high fertilizer consumption, poor yield stability, etc., to control the growth of invalid tillers and reduce non-point source pollution , the effect of reducing the amount of chemical fertilizer

Active Publication Date: 2016-03-09
HUNAN RICE RES INST +1
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  • Description
  • Claims
  • Application Information

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 fert

Method used

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

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Experimental program
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Effect test

Embodiment 1

[0025] The thousand-grain weight of a super-high-yielding rice variety with large panicle type is 26.8g, the population is estimated to have 40 million spikelets, and the seed setting rate is 85%. In the initial stage of young panicle differentiation, pure N=40 million×85%×[4‰+(26.8 —25.0)‰)]×10 -4 =19.72kg, K 2 O dosage 19.72kg, P 2 o 5 The application rate is 7.88kg.

Embodiment 2

[0026] Embodiment 2: Population structure, yield composition factor and yield comparison table (2014, Changsha)

[0027]

[0028] The test results show that compared with the prior art, the population constructed by the present invention is smaller, such as the number of total spikelets and the number of effective spikes are all lower than the prior art, but the present invention strengthens the individual development, especially promotes the development of reproductive organs. The growth of (rice ear) makes the total number of grains per ear, seed setting rate and thousand-grain weight all have different degrees of improvement, and also greatly improves the fertilizer utilization rate. In summary, the present invention also taps out the super-high yield potential of large panicle rice varieties on the premise of saving a lot of chemical fertilizers.

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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 ...

Claims

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Application Information

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IPC IPC(8): A01C21/00
Inventor 刘洋张玉烛
Owner HUNAN RICE RES INST
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