Cotton suitable for what soil planting

1. Preparation of land and seed before sowing

After seed germination, the cotyledons of the hypocotyls elongate out of the soil, the soil texture and sowing quality requirements are high. Therefore, careful land preparation and soil moisture construction should be done before sowing to create good sowing conditions.

Selecting seeds with high maturity and fullness as sowing materials is a prerequisite for full and robust seedlings. Generally use sulfuric acid to dehair the cotton lint tongue to remove white seeds and broken seeds.

Sun-drying can promote seed maturity and improve germination rate. Generally sun-dried for 4-5 days on a sunny day before sowing, wedding seeds are bitten by the teeth with a ringing sound. Pre-sowing seed treatment is an effective way to improve the yield of field bacteria and control cotton field pests and diseases.

Seed treatment is usually used sulfuric acid to defluff the cotton seeds, and after defluffing and then coated with seed coating agent. Seed coating agent is developed on the basis of chemical dipping and seed mixing.

Up. Seed wattle is made of insecticides, fungicides, trace elements and growth regulators through a special processing technology, which can quickly solidify into a film on the seeds. When the seed is planted in the soil, it only absorbs water and is almost insoluble, so the pesticide

Pesticide's validity period is greatly extended and can be as long as 40-60 days. At the same time, the coated seeds can be directly packaged and stored, which can meet the requirements of large-scale centralized processing of seed industrialization. Scope

Seed coating agent can completely change the current backward seed treatment technology such as seed dipping and chemical seed mixing, which is a major innovation in traditional agricultural technology.

2. Sowing and reasonable dense planting

Temperature is an important basis for determining the sowing period. Generally speaking, the appropriate sowing period is the ground temperature reaches 5 cm deep and stabilized at about 12-14 ℃. Mechanical sowing is highly efficient, the rows are straight, the depth is consistent, the sowing is uniform, the soil moisture is less, the seedlings emerge quickly, and it is conducive to sowing all the seedlings at once. Sowing depth of about 4cm.

Cotton planting density should be determined by the ability to make full use of the existing production conditions and local light and heat resources to maximize group production as a prerequisite.

So planting density should be based on climate, soil, water and fertilizer conditions, varieties, cultivation techniques to determine. Cotton growing period average temperature is high, the south of sufficient moisture, long frost-free period, it is appropriate to sparse planting, otherwise.

Appropriate dense planting. Soil fertility is high, good water and fertilizer conditions of cotton fields to plant less, otherwise to increase the density appropriately. Early maturity, compact or early senescence varieties should be densely planted, otherwise sparse.

3. Fertilization and drainage

Organic fertilizer application, fertilization, improve soil fertility, is the basic link to improve the level of production. In the case of insufficient soil fertility and low cotton yield, the application of nitrogen fertilizer has obvious benefits. However, as the yield level increases, due to the soil nutrient status, the application of nitrogen fertilizer must be applied in conjunction with phosphorus and potassium fertilizer in order to give full play to the benefits of nitrogen fertilizer. The ratio of nitrogen is 1:1-1:1.5. cotton has a long growing period. On the basis of adequate base fertilizer, according to the characteristics of the growth period of cotton plants, staged fertilizer. Cotton bud stage is the key period of fertilization.

Northern cotton areas often spring drought, pre-sowing water storage irrigation is the most important irrigation of cotton fields. This is a key measure for cotton seedlings to grow well and early. Water storage irrigation can be used for winter irrigation or spring irrigation.

4. Cotton pruning and chemical control

Cotton pruning is a traditional hand operation program, including defoliation and de-branching, topping, pruning, wiping the excess buds, and beating the old leaves. The purpose of pruning is to

control the type of cotton plant, adjust the distribution of nutrients in the cotton plant, reduce ineffective consumption. Pruning to coordinate the contradiction between nutrient growth and reproductive growth, and prevent overgrowth, improve group light, reduce bud and boll shedding, promote early maturity, improve yield.

The impact of quantity. The key to topping is to master the time, usually 80~90 days before the first local frost. The principle is:When the branches are not equal,

The time comes when the branches grow. Pruning is pruning the tops of the fruiting branches. In high-yield fields, cotton plants grow vigorously, so pruning should be carried out in stages. It is generally advantageous to remove leafy branches below the first fruiting branch in a timely manner after cotton buds appear.

Fruiting branch buds grow normally and bear peaches early.

Growth regulator is an effective technical measure to regulate the cotton plant and population structure. Commonly used growth retardants are dwarf and growth hormone (formerly known as Sujean). In recent years, it is mainly used to strengthen the body.

5. Pest control

Mainly cotton blight, wilt, aphids, bollworms, tigers, thrips and so on.