A method for controlling water, fertilizer and salt of sunflower in mildly saline-alkali land
A technology for saline-alkali land and sunflower, applied in the field of water, fertilizer and salt regulation of sunflower in mildly saline-alkali land, can solve problems such as rising groundwater level, unreasonable flood irrigation, increased submerged evaporation, etc., and achieves the effect of saving water
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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, and the amount of rinsing water is 100-120m 3 / mu, irrigated at the early stage of sunflower budding, the irrigation water volume is 52m 3 / 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 60-70m during the growth period 3 / mu, select the sunflower variety as "3638", sow 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 can be seen from th...
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