Nitrogen fertilizer applying method

A technology of nitrogen fertilizer and application rate, which is applied in the direction of fertilization methods, fertilization devices, botany equipment and methods, etc., can solve the problems of expensive equipment, high nitrogen fertilizer use efficiency, gaps, etc., and achieve the improvement of nitrogen fertilizer use efficiency and easy operation , the effect of increasing rice yield

Inactive Publication Date: 2017-10-20
SICHUAN AGRI UNIV
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Problems solved by technology

Rice leaf-age nitrogen application mode, usually nitrogen fertilizer is divided into three parts: base fertilizer, tiller fertilizer and ear fertilizer, the rice yield is high, and the nitrogen fertilizer utilization rate is relatively high; real-time nitrogen fertilizer management mode, the number of nitrogen fertilizer application is not fixed, usually 4-7 times , the rice yield is relatively high, and the nitrogen use efficiency is high; the base fertilizer is cleared in one pass, and the number of nitrogen fertilizers is only used once, and the rice yield and nitrogen use efficiency are both low
Among the three ni

Method used

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Embodiment 1

[0026] Field tests with medium fertility were selected, and nitrogen fertilizers were applied by the method of regularly and quantitatively applying nitrogen fertilizers of the present invention.

[0027] (1) Test location and method

[0028]The experiment was carried out in 2014 in the Rice Research Institute of Sichuan Agricultural University in Wenjiang District, Chengdu City, Sichuan Province, and Yixiang 3724 was selected as the experimental material. The soil texture of the plow layer of the test field is sandy loam, the soil fertility is medium, and the organic matter content is 14.19g kg -1 , total nitrogen 0.118%, available nitrogen 97.6mg kg-1, available phosphorus 19.8mg kg -1 , available potassium 82.4mg kg -1 . Sow seeds on March 27, raise seedlings in drought. Transplanted on April 30, the leaf age is four leaves and one heart, the row spacing is 33.3cm×16.7cm, single seedlings are transplanted, and harvested on September 1. The experiment adopted a single-f...

Embodiment 2

[0043] Field tests with higher fertility were selected, and nitrogen fertilizer was applied by the method of regularly and quantitatively applying nitrogen fertilizer of the present invention.

[0044] (1) Test location and method

[0045] The experiment was carried out in 2014 in the Rice Research Institute of Sichuan Agricultural University in Wenjiang District, Chengdu City, Sichuan Province, and Yixiang 3724 was selected as the experimental material. The soil texture of the plow layer in the test field is sandy loam, with high soil fertility and an organic matter content of 22.56 g kg -1 , total nitrogen 0.174%, available nitrogen 131.6mg kg -1 , available phosphorus 30.8mg kg -1 , available potassium 107.4mg kg -1 . Sow seeds on March 27, raise seedlings in drought. Transplanted on April 30, the leaf age is four leaves and one heart, the row spacing is 33.3cm×16.7cm, single seedlings are transplanted, and harvested on September 1. The experiment adopted a single-fac...

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Abstract

The invention relates to a nitrogen fertilizer applying method, and the method is as follows: a quantitative nitrogen fertilizer is respectively applied to rice in the seventh day, the fourteenth day, the thirty-fifth day, the forty-ninth day, the fifty-sixth day, the seventieth day and the seventy-seventh day after rice transplanting so as to improve rice yield and / or nitrogen utilization rate. The method has the advantages of timing and quantitative nitrogen fertilizer application and simple and easy operation. Compared with a real-time nitrogen management mode and a leaf age nitrogen application mode, the nitrogen fertilizer applying method can synchronously significantly improve the rice yield and the nitrogen utilization rate in a low fertility field, the nitrogen utilization rate in a medium fertility field of the nitrogen fertilizer applying method is higher than that of the leaf age nitrogen application mode, and the rice yield in a high fertility field of the nitrogen fertilizer applying method is higher than that of the real-time nitrogen management mode.

Description

technical field [0001] The invention relates to a method for applying nitrogen fertilizer, in particular to a method for applying nitrogen fertilizer for improving rice yield and / or nitrogen utilization rate. Background technique [0002] At this stage, the average amount of nitrogen fertilizer used in a single season in rice fields in my country is about 180kg hm -2 , about half higher than the world average. The high input of nitrogen fertilizer in my country's rice (Oryza sativa L.) production is not only closely related to the low level of nitrogen fertilizer management technology mastered by farmers, but also an objective requirement for my country's rice production to maintain high and stable yields to meet food security needs. Based on this, most of the research on rice nitrogen fertilizer management in my country is based on the premise of high and stable yield. Through continuous improvement of fertilization technology, nitrogen fertilizer use efficiency is improve...

Claims

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Application Information

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IPC IPC(8): A01C21/00A01G16/00A01G22/22
Inventor 杨志远李娜孙永健徐徽马均
Owner SICHUAN AGRI UNIV
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