Optimized technique of fertilization of lagging nitrogen fertilizer for paddy rice in cold farmland

A nitrogen fertilizer and rice technology, applied in fertilization devices, fertilization methods, applications, etc., can solve the problems of rice nutrient deficiency, rice quality decline, thousand-grain weight decline, etc. mature effect

Inactive Publication Date: 2006-04-19
NORTHEAST AGRICULTURAL UNIVERSITY
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Problems solved by technology

In addition, agricultural technicians and rice farmers are worried that fertilization at the later stage will lead to greedy greens and late maturation, so they dare not apply fertilizer in the later stage of rice gro

Method used

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Examples

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Embodiment Construction

[0014] The following examples describe the present invention in more detail:

[0015] The amount of nitrogen fertilizer in each stage of rice cultivation and growth is distributed according to the ratio of 45% of base fertilizer, 20% at the early tillering stage, 15% at the young panicle differentiation stage, and 20% at the meiosis stage. Among them, the base fertilizer refers to 5-7 days before transplanting, the early stage of tillering refers to 5-7 days after transplanting, and the ear differentiation period refers to 35-40 days after transplanting. It refers to 55-60 days after transplanting, and the remainder of leaf age at this time is 0.5 leaves.

[0016] Farmers set aside 30m in the rice field 2 The area is the same as that of other rice fields, but no nitrogen fertilizer is applied, phosphorus and potassium fertilizers are applied normally, and the yield is measured after harvest. The difference between the yield and the target yield is multiplied by 17.5kg of nitr...

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Abstract

An optimized fertilizer application technique for paddy rice in cold region features that the N fertilizer applied in early phase is decreased and the N fertilizer applied in later phase is increased for increasing yield and improving quality. The percentages of the N fertilizer applied in different stages are 45% for base fertilizer, 20% in early tiller stage, 15% for young ear differentiating stage and 20% for reduction division stage.

Description

(1) Technical field [0001] The invention relates to a method for fertilizing crops, in particular to a method for fertilizing rice in cold regions. (2) Background technology [0002] Rice is a major food crop. In 2005, the rice planting area in Heilongjiang Province reached 28 million mu, and there is a trend of further development. Rice production is closely related to my country's food security issues. Continuous improvement of rice fertilization technology is the main way to protect the fertility of black soil and increase and stabilize rice production. It is a key issue for sustainable agricultural development and an important guarantee for food security. [0003] Northeast my country is located in a cold region. Although the total nutrient content of the soil is high, due to the low temperature in the early stage, the traditional rice fertilization technology emphasizes the early growth and rapid development of tillers, and pays attention to early fertilization, especia...

Claims

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Application Information

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IPC IPC(8): A01C21/00
Inventor 刘元英彭显龙罗盛国范立春
Owner NORTHEAST AGRICULTURAL UNIVERSITY
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