Method for regulating and controlling sunflower water-fertilizer salt in slight alkaline land

A technology for saline-alkali land and sunflower, which is applied to the field of water, fertilizer and salt regulation of sunflowers in mildly saline-alkali land, can solve the problems of rising groundwater level, aggravated soil secondary salinization, unreasonable flood irrigation, etc., and achieves the effect of saving water.

Inactive Publication Date: 2013-09-04
INNER MONGOLIA AGRICULTURAL UNIVERSITY
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Problems solved by technology

However, in order to pursue higher yields, farmers have generally applied a large amount of fertilizers blindly in recent years, making the negative ecological effects caused by the accumulation of nitrogen and phosphorus far from the yield gains of crops.
Coupled with unreasonable flood irrigation, the groundwater table rises, phreatic evaporation increases, and the secondary salinization of the soil intensifies
At present, in order to ensure the yield of mildly saline-alkaline crops, most of the focus is on macro-qualitative aspects such as soil improvement and field research

Method used

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  • Method for regulating and controlling sunflower water-fertilizer salt in slight alkaline land

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Embodiment 1

[0028] Using the water and fertilizer control technology for sunflowers in mild saline-alkali land of the present invention, irrigation and leaching are carried out before sowing, with a water volume of 100 to 120 m3 / mu, and irrigation is carried out at the early stage of sunflower budding, with an irrigation water volume of 52 m3 / mu. The amount of fertilizer applied is 25kg / mu of diammonium phosphate and 15kg / mu of urea, of which diammonium phosphate is applied as a base fertilizer at one time, and urea is applied as a topdressing fertilizer during the sunflower budding stage with irrigation. day sowing.

Embodiment 2

[0030] Conventional fertilization amount: 28kg / mu of diammonium phosphate, 17kg / mu of urea and traditional irrigation method: irrigation amount of 60-70m3 / mu during the growth period, the sunflower variety "3638" was selected, and the seeds were sown on May 26.

[0031] The average yield of sunflowers in Example 1 is 265.4kg / mu, the average yield of sunflowers in Example 2 is 259.9kg / mu, the average yield per mu is higher than the local level by 5.5kg / mu, and water saving is 15%, and fertilizer is saved by 10%. After the sunflowers were harvested, the soil samples were taken for analysis. Compared with the soil 0-40cm EC measured on May 26 before planting, the average increase of water, fertilizer and salt control land was 0.25, while the local level sunflower land EC value increased 0.35, and the water, fertilizer and salt control was carried out. The degree of salt accumulation in the sunflower is weaker than the local level. For specific changes, see figure 1

[0032] It ...

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Abstract

The invention discloses a method for regulating and controlling sunflower water-fertilizer salt in a slight alkaline land. The method comprises the following steps: (1) selecting the slight alkaline land, (2) carrying out leaching before sowing, (3) carrying out land consolidation, and (4) selecting varieties, selecting '3638' sunflowers, and carrying out film mulching plantation. At the squaring stage of the sunflowers, irrigation water is 52 m3/ mu, and at the full duration stage of sunflower growth, the application number of the fertilizers is that base fertilizer diamine is 25 kg/mu, and topdressing urea is 15 kg/mu. The salt accumulating degree of a sunflower land using the regulation and control technology is lower than the salt accumulating degree of a local level, and water is saved.

Description

technical field [0001] The invention belongs to the technical field of soil improvement, and relates to a method for controlling water, fertilizer and salt of sunflowers in mildly saline-alkali land. Background technique [0002] According to the second soil census in my country, the area of ​​saline-alkali land resources in China is about 527 million mu. However, about 100 million mu of saline-alkali cultivated land that can be developed and utilized in the near future is mainly distributed in North China, Northwest China, Northeast my country and coastal areas. Among them, the Hetao irrigation area in Inner Mongolia has a total land area of ​​17.84 million mu, which is a typical area where soil salinization develops in China. Mildly salinized soil (salt content 2-4g / kg) accounts for 24% of the cultivated land area. Affected by factors such as unreasonable irrigation and fertilization, the area of ​​secondary salinized soil is still expanding. Sunflower is one of the main...

Claims

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Application Information

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IPC IPC(8): A01B79/02
Inventor 史海滨杨树青李仙岳李瑞平李为萍辛静静梁建财刘瑞敏王宁王长生付小军李正中闫建文苗庆丰赵倩王志超胡敏常春龙田德龙孙玲玉刘德平马金慧周春生龚雪文张作为李祯王成刚程光远冯利忠杨松益
Owner INNER MONGOLIA AGRICULTURAL UNIVERSITY
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