Fertilization method for planting sunflower in mild saline-alkali land

Abstract

The invention discloses a fertilization method for planting sunflower in mild saline-alkali land. The fertilization method comprises the following steps: (1) seed dressing, namely soaking sunflower seeds in vitamin B6 aqueous solution, airing and sowing; (2) applying base fertilizer, namely applying 1500kg-2500kg of decomposed farmyard manure per mu; the nitrogen fertilizer is applied twice, the nitrogen fertilizer which accounts for 55%- 60 % of the total mass of the nitrogen fertilizer is applied as the base fertilizer before the sunflower is sown, and the phosphate fertilizer and the potashfertilizer are all applied as the base fertilizer at one time; the mass ratio of N: P2O5: K2O is 11-16.5:4.6-6.9:3-4; (3) top dressing: top dressing, mainly nitrogen fertilizer, is carried out in thebud stage of the sunflower, and 40 to 45 percent of the total mass of the nitrogen fertilizer is used as top dressing; trace element foliar fertilizer was supplemented in time, before and after flowering period, and when the available boron content in soil is lower than 0.4mg / kg soil, the leaves are sprayed with 0.1%-0.2% borax aqueous solution. The fertilization method is formulated according tothe type characteristics of the mild saline-alkali land and the growth and development characteristics of the sunflower in the Hetao Irrigation Area, and is suitable for planting the sunflower in themild saline-alkali land in the Hetao Irrigation Area.

Description

technical field [0001] The invention relates to the field of soil improvement, in particular to a fertilization method for planting sunflowers in mild saline-alkali land. Background technique [0002] The Hetao irrigation area in Inner Mongolia is one of the largest artesian irrigation areas diverted from the Yellow River in my country, and it is also an important commodity grain and oil base in China. Soil salinization in the Hetao Irrigation District is serious. The area of ​​saline-alkali soil in the whole district is about 4.64 million mu, of which the area of ​​mild (salt content in the plow layer 2.0-4.0g / kg, the same below) salinization area is 1.8924 million mu, accounting for 52.83%. At present, soil salinization has become one of the main problems restricting the construction of ecological environment and the sustainable development of agriculture in Hetao irrigation area. In recent years, due to unsuitable irrigation and drainage projects, poor drainage and unrea...

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Problems solved by technology

[0004] In order to overcome the "heavy nitrogen, phosphorus and low potassium" existing in the mild saline-alkali land sunflower planting in the Hetao irrigation area of ​​Inner Mongolia, that is, excessive nitrogen and phosphorus fertilizer application, insufficient potassium fertilizer application, and nutrient imbalance lead to a decline in the yield and quality of edible sunflower, and fertilizer use efficiency. Low, and the local area mostly uses one-time bottom application of fertilizers, and there are problems such as insufficient growth and fertilizer efficiency in the later stage. The purpose of the present invention is to provide a method for planting sunflowers in mild saline-alkali land in the Hetao irrigation area of ​​Inner Mongolia to realize the root growth of sunflowers and save costs and increase efficiency. formula fertilization

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