Shandong Agricultural Expert Consultant: Cotton Drought Resistant Spring Sowing Technology Advice

Yes

First, select good seeds and make good preparations.

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To select seeds, we must first select the seeds that have been approved and matched with cotton varieties, and advocate the use of processed and selected seeds. It not only has high germination rate, but also plays an important role in controlling pests and diseases at seedling stage.

It is strictly forbidden to soaking seeds in coated seeds. Seeds not coated should be selected with seed soaking to eliminate the yellow and reddish seeds of seed coat, so as to improve the germination rate.

Two, tap water sources, create soil moisture and preserve soil moisture.

The cotton planting areas in our province are mainly distributed in three major areas: North Shandong (East), Northwest Shandong and Southwest Shandong.

In the southwest of Shandong Province, there are many seedlings for pplanting, and little water needs to be raised during the seedling season. Most of them are direct seeding cotton fields in the north of Shandong Province and the northwest of Shandong Province.

Therefore, we should fully tap the source of water, make good soil moisture before planting and preserve soil moisture.

(1) if there are conditions for watering, seize the opportunity to create soil moisture.

Theoretically, it is generally the best time to make soil moisture 20 days before planting.

Taking into account the continuous drought and rain this year, the water supply is relatively tight. We should make timely soil moisture according to the local water sources, and timely rake and preserve soil moisture after making the soil moisture.

(two) no water pouring condition is recommended.

A month or so before planting, the soil will be covered by plastic film, then the plastic film will be covered, and both sides of the plastic film will be compacted.

This method can significantly reduce surface evaporation and water loss, maintain soil moisture, and significantly improve cotton planting in arid areas and saline alkali areas. Especially after the local small scale precipitation or early soil moisture production, the effect is better, and it is worth promoting.

Three, according to local conditions, drought resistant seeding

(1) "water bag".

This is the most effective method for drought resistance without Mulching.

The method is to open a shallow ditch with a depth of about 2.5cm, and uniformly water the water. The amount of water will be connected to the soil at the end of the soil. When the soil is under water, the cotton seeds will be planted on the spot. The ridge will be raised on the cotton covered soil and 3-5cm above the surface. When the seeds above 70% are taken root, the seeds will be levelled at once.

(two) drought resistant seedling raising.

On the basis of seeding on the seedbed, we should reduce the water supply in the seedbed, and gradually carry out seedling drought tolerance training. When the red stem of the seedlings reaches half of the seedlings, the adaptability to drought will increase, and the drought resistance will be achieved after pplanting.

(three) ditch film.

Before planting, furrow, ditch water, then sowing the soil, and then mulch film, this method is suitable for dryland to protect seedlings.

Four, flexible determination of seeding time.

At present, there are more varieties of cotton seeds, and the requirements for seeding period are more flexible.

Under plastic mulching, it is generally suitable for sowing from mid April to early May.

In previous years, cotton planting was mainly based on temperature factors, and seeds began to sow as long as the temperature reached.

In addition to considering the temperature factors this year, we should pay more attention to the soil moisture condition. If the temperature is up and the moisture content is insufficient, we suggest that the cotton growers should wait. If the soil moisture content is OK, even if the temperature is slightly worse, we can consider planting, but at this time we should increase the seeding rate appropriately.

Five, seedling protection technology

(1) seeding, replanting and pplanting

After seeding, we should check in time and find that the seeds should be sowed and covered.

If cotton is found to be broken, it should be sprouting and replanting in time.

It is easy and feasible to pplant seedlings from shoots to seedlings in situ.

When the two leaves are flat, they should be pplanted with soil. When pplanting, the soil table should be large, not scattered, and properly watered to avoid soil compaction around the cotton seedlings.

In order to ensure the uniform growth of cotton seedlings, a certain number of prepared seedlings should be planted between rows.

(two) careful watering and timely cultivation.

In spring cotton soil in our province has large soil moisture loss, and seeds often fall dry. After planting, soil moisture should be repressed in time to improve the water supply of seed layer.

When the soil moisture is too bad, irrigation measures should be taken, and small water should be poured between rows.

Two ripe cotton areas were harvested after the previous crop, and the irrigation was determined according to the soil moisture.

If the soil is hardened after sowing, it should be timely tillage and loosen, so as to improve the soil temperature and promote the germination and seedling growth of cotton seeds.