Planting sunflowers and soil cultivation!

First, choose the land

Choose a medium-salt saline land or a soil with a fertility above medium (ie, the corn yield reaches 500kg/mu), the land should be flat and easy to irrigate. For more than three years of rotation, it is best not to choose heavy glutinous rice and grazing land. It is best to choose corn, wheat and melons. A plot of no long-lasting herbicide residue.

Second, soil cultivation

The task of soil cultivation is firstly to adjust the relationship between plough layer water, fertilizer, gas and heat; the second is to create deep plough layers and suitable seedbeds; the third is to bury buried residuals, fertilizers and weeds; It is to eliminate pests and diseases.

1. Tillage In order to increase the living soil layer, the autumn crops should be ploughed after harvesting. The depth of ploughing should not exceed 625px, and the tillage should be carried out once every 2 to 3 years. The upper layer of salt can be leached to the lower layer by deep tillage of the saline-alkali land, and the crop can be grown in the safe salt-alkali range in the early stage to increase the seedling-preserving rate.

2, deep pine deep pine tillage only loose does not turn, can break the plow bottom layer formed by tillage, which is conducive to precipitation infiltration and increase the water holding capacity of the cultivated layer soil. The saline-alkali land can maintain the position of the desalted soil layer and reduce the salt and alkali damage. It is suitable for arid and semi-arid areas with deep soil layers, and soils with thin soils, which are not suitable for tillage, saline-alkali land and white soil areas.

3, Rotary tillage can not only loosen the soil, but also can break the soil, the ground is also quite flat, collecting plow, hoe, and flat three operations in one, the depth of rotary tillage is 10 ~ 12cm. For many years of continuous simple rotation, it is easy to cause the shallowing of the plough layer and the deterioration of the physical and chemical properties. Therefore, the rotary tillage should be applied in rotation.

4, squatting and squatting land is mainly shallow ploughing, smashing smashing or smashing, breaking the knot and weeding. It is usually carried out after ploughing and before planting.

The ground is for the soil, light pressure, to prevent the wind from running.耙耱 can be done at the same time.

5, as a cockroach and ridge ridges are generally carried out before planting, and strive to achieve the same size of the plot, irrigation and drainage freely. Rifting is beneficial to increase the ground temperature, prevent wind and drainage, prevent topsoil, improve loam venting, and bury buried weeds.

The seeds of the sunflower hybrids have weak germination potential, low fullness, small shells and weak top soil ability. If the soil cultivation does not affect the quality of the seeding, the whole seedling cannot be guaranteed. Soil cultivation must be done in the ground, the soil is broken, the upper part is loose, and there is no root.