At which latitude does cotton grow best?

1) Cotton area of the Yellow River Basin.

It includes seven provinces and cities of Shandong, Hebei, Henan, Shanxi, Shaanxi, Beijing and Tianjin north of the Qinling-Huai River, south of the Great Wall, and east of Liupan Mountain. The cotton output is the largest in Shandong, Henan and Hebei provinces. This area has a long history of cotton planting, superior natural conditions, flat terrain in the area, less autumn rain, and sufficient sunshine, which is conducive to the growth of cotton, and has become the largest cotton producing area in China, and its planting area accounts for 1 2 of the national cotton field area.

2) Cotton area in the Yangtze River Basin.

This area includes Shanghai, Zhejiang, Jiangsu, Anhui, Jiangxi, Hunan, Hubei and other provinces and cities, and Hubei and Jiangsu provinces have the largest output. The region has a long history of cotton planting, high technical level, sufficient labor, developed textile industry in the region, and convenient transportation conditions, making the region the cotton area with the highest cotton yield and commodity rate in the country, and also the second largest cotton-producing area in China. However, in autumn, there is more rain, high humidity and less sunshine, which affects the cotton spit and the quality of cotton is not as good as that of the cotton area in the Yellow River Basin.

3) Northwest Inland Cotton Region.

It includes Xinjiang and the Hexi Corridor of Gansu Province. This area is located in an arid area, with less precipitation, superior light conditions, large temperature difference, less pests and diseases, good cotton quality, is the third largest cotton-producing area in China, and is also a high-quality long-staple cotton producing area in China.

Cotton grows best at a temperature of about 30 degrees, because the light time at this latitude is long, the climate is neither cold nor hot, and the growth cycle is also longer.

1.Cotton growth cycleThe growth cycle of cotton from sowing and seedling emergence to boll formation and boll setting is generally 150 to 200 days. According to the changes in the formation of its growth period, it is generally divided into seedling stage, bud stage, flower boll stage and mature boll stage.

These four periods reflect the characteristics of cotton growth and development stages and their different requirements for environmental conditions. 2.Temperature requirements for cotton growing.

Cotton is a temperature-tolerant crop. Wild cotton grows year-round in tropical cultivated cotton without frost. Higher temperatures are required during the growing period.

The minimum temperature of germination is 10 20 ; The minimum temperature of budding was 19 20, and the temperature increased, and the budding speed accelerated. The optimal temperature for the flowering stage is 25 35. If the daily minimum temperature is lower than 15, or the daily maximum temperature is higher than 35, it will hinder the development of pollen, which is not conducive to flowering and pollination, and is easy to cause flower buds and boll to fall off. When the bell is ripe, the temperature should be above 20.

If the temperature is below 16-20, it is not conducive to fiber development and boll maturation. Cotton requires a certain amount of heat to complete the growth cycle properly. In general, the effective accumulated temperature from sowing to emergence is about 75 100, from emergence to budding is about about the effective accumulated temperature (the sum of the daily average temperature is higher than 19 20 temperature difference), from budding to flowering is about 89 130 (the sum of the temperature difference when the daily average temperature is higher than 25) is 300, and the effective accumulated temperature from flowering to spitting (the sum of the temperature difference when the daily average temperature exceeds 15) is 500 650

Cotton is a crop that likes high temperatures and requires high temperatures throughout the growing period, with the optimum growing temperature around 25-30. And it also likes the sun, if it can receive 12 hours of light a day, it will help it grow faster.

Cotton growth habits.

Cotton is a crop that likes high temperatures and requires high temperatures throughout the growing period, with the optimum growing temperature around 25-30. And it also loves sunlight, and if it can receive 12 hours of light a day, it will help it grow faster.

Cotton likes to grow in**.

Cotton is native to India and Arabia, and the main production areas of cotton are in China, the United States, India, Uzbekistan, Egypt and other regions, of which China's production areas are mainly distributed in southern Xinjiang, Jiangsu, Anhui, Hubei, Henan and other regions.

In addition, cotton is a kind of heat-loving, light-loving, drought-tolerant cash crop, suitable for planting in loose, deep soil, generally planted in warm, sunny areas.

Cotton growing environment and conditions.

1.Lighting

Cotton is a kind of light-loving cash crop, which is more suitable for growth and development under sufficient light and warm conditions, and the most suitable range of light intensity of cotton leaves is generally 8000 70000lx, so in this range, the intensity of photosynthesis will gradually increase with the increase of light intensity.

2.moisture

Water is a necessary ingredient in the growth process of cotton, and cotton needs to absorb water from the soil for its own growth and development.

3.Soil

The water and nutrients required for the growth and development of cotton are obtained from the soil through the roots, and most of the silver or temperature and air required for growth also come from the soil, so the quality of the soil in the cotton field determines the yield of cotton and the quality of cotton to a large extent.

【In the world's production areas】

China, the United States, India, Uzbekistan, Egypt, etc. Among them, China has the largest unit output, and Uzbekistan is known as the "country of platinum".

【Production areas in China】

Jianghuai Plain, Jianghan Plain, Southern Xinjiang Cotton Area, Central and Southern Hebei, Northwest Shandong, Northern Henan Plain, Coastal Plain in the lower reaches of the Yangtze River.

Lighting conditions: Xinjiang cotton is mostly early-medium-maturing, early-maturing and extra-early-maturing varieties, which are insensitive to light length. It is a light-loving crop and is suitable for growing under sufficient light conditions.

The light compensation point and light saturation point of cotton are both high. According to the measurement, the light compensation point of cotton single leaf is 750 1000 lx, and the light saturation point is 7 80,000 lx. In general, the suitable range of light intensity of cotton leaves is 8000 70000 lx, and the photosynthetic intensity increases with the increase of light intensity.

Moisture conditions: Water is an important component of cotton, and cotton needs to absorb water from the soil to grow. The physiological water requirements of cotton at each growth stage are:

From sowing to emergence, the water content of 0 20 cm soil layer accounts for 70 80% of the field water holding capacity. At the seedling stage, the water content of 0 40 cm soil layer accounted for 60 70% of the field water holding capacity. At the early budding stage, the water content of 0 60 cm soil layer accounted for 65 75% of the field water holding capacity. After the full bud stage, the water content of the 0 80 cm soil layer accounts for 70 80% of the field water holding capacity, and it should not be less than 60 65%. During the flocculation period, the relative moisture content of the soil should be kept at 55-70%. According to relevant studies, about 2 3 of the water consumed in cotton fields during the whole growth period is transpiran, and 1 3 is consumed by land evaporation.

Soil conditions: Cotton needs water and nutrients for growth and development, mainly from the soil through the root system, and the required temperature and air are partly taken from the soil, and at the same time need the mechanical support of the soil to grow. The physicochemical and biological properties of cotton soil greatly restrict the yield and quality of cotton.

Soil moisture, nutrients, temperature, air, salinity, texture, etc. have a great impact on cotton growth.

Cotton should have a certain amount of light during the growth period.

Accept about 8-12 hours a day, and have enough water during the growing period, especially during the full flowering period. The temperature should not be too low, the suitable temperature for seeds is 10-20, and the temperature at flowering should be around 25-35. Cotton is native to the tropics, is a perennial woody plant, it is one of the main cash crops along the Huaihuai North, due to the drought in spring and autumn, the temperature in winter is low, the rain is concentrated in summer, the groundwater level is high, it is susceptible to waterlogging, and the soil fertility is low at the same time, it is basically a year to crop, and the winter fallow farming system.

Cotton is a heat-loving crop, and there is a certain demand for water, but the flowering period (that is, the pollination period) and the harvest period should not be rainy and light-loving, so the areas with dry climate but sufficient irrigation water sources are most suitable for planting cotton, such as: Nile Valley, Delta, Uzbekistan, American cotton belt, southern Xinjiang and other places.

Cotton grows in sufficient light (a long-day plant), is drought tolerant, and is suitable for growing on sandy soils and other well-drained soils. The main influencing factor of the distribution of cotton is social demand, for example, the large cotton yield in the Yangtze River basin is not because of good natural conditions, but because of large demand.

China, United States, India, Uzbekistan, Egypt.

Rain and heat in the same period of the region. For example, in North China, Xinjiang is also rich in cotton, because the temperature in Xinjiang is high in summer, and in summer, iceberg snow melt water can also meet the irrigation of cotton.

It is born in the hot and dry mountains of the climate. It is distributed in Hainan, Taiwan, Guangxi, Yunnan and southern Sichuan; Guangdong and central Fujian are widely cultivated in the south. It is found in India, Indochina, Malaysia and tropical Australia.

The main thing is that there is plenty of light. Xinjiang is the main producing area of China. It is followed by the Yellow River Basin and the Yangtze River Basin.

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It is suitable for farming in Anhui.