What is accumulated temperature geography How is the accumulated temperature zone divided

The sum of the daily average temperatures over a period of 10 degrees Celsius or more is called the active accumulated temperature, that is, the accumulated temperature.

The sum of the daily average temperature during the growth and development of crops.

The division of the accumulated temperate zone is that the active accumulated temperature of the first accumulated temperate zone is more than 2700, the active accumulated temperature of the second accumulated temperate zone is 2500 to 2700, the active accumulated temperature of the third accumulated temperate zone is 2300 to 2500, the active accumulated temperature of the fourth accumulated temperate zone is 2100 to 2300, the active accumulated temperature of the fifth accumulated temperate zone is 1900 to 2100, and the active accumulated temperature of the sixth accumulated temperate zone is less than 1900.

Accumulated temperature refers to the sum of the daily average temperature 10 during the continuous period of daily average temperature in a certain period of time, that is, the sum of active temperatures, referred to as accumulated temperature. It is an index to study the relationship between temperature and the development rate of biological organisms, and represents the effect of temperature on the growth and development of biological organisms from two aspects: intensity and action time.

The term accumulated temperature is the sum of the average daily temperature or the average daily temperature that meets certain requirements over a certain period of time.

The term accumulated temperature is the sum of the average daily temperature or the average daily temperature that meets certain requirements over a certain period of time. The structure is:

Product (left and right structure) temperature (left and right structure). The phonetic pronunciation is: 一 .

Pinyin is: jīwēn.

What is the specific explanation of accumulated temperature, we will introduce it to you through the following aspects:

Verses about Jiwenwen.

Winter accumulation temperature Xi Lian and winter accumulation of warm water.

Idioms about accumulated temperature.

Soft fragrance, warm jade, warm sheng, perfect pillow, stable and warm, relive the old dream, elegant and gentle, warm and lush.

Words about accumulated temperature.

Wen Fan Pillow Soft Fragrance, Wen Yu Fan Pillow, Wen Xi Wen Moist and Ze, Gentle Dun Houer Ya Wen Bing Seeking Respect, Wen Pillow Stable Warm Gentle Township Gentle and Frugal.

Sentence formation about accumulated temperature.

1. There was no significant correlation between annual growth and annual accumulated temperature and annual rainfall.

2. The increase in temperature increases the accumulated temperature and makes the heat resources more abundant.

3. The phenomenon of generational differentiation was determined, and the starting point temperature and effective accumulated temperature of the egg stage, larval and pupal stage and the whole generation were determined.

4. Under laboratory conditions, the starting temperature and effective accumulated temperature of each insect state of wheat moth cocoon wasp were studied.

5. The effective accumulated temperature required from dormancy to germination varies with different provenances, temperatures, and low temperature treatments.

Accumulated temperature, refers to the sum of the daily average temperature accumulation in a certain period of time, divided into active accumulated temperature and effective accumulated temperature, etc., is an index to study the relationship between temperature and the development rate of biological organisms, from the intensity and action time of two aspects of the impact of temperature on the growth and development of biological organisms, generally in units.

Compute. Under the premise that other environmental conditions are basically satisfied, there is a positive correlation between temperature and the development rate of organisms in a certain temperature range. Depending on the species, varieties and growth periods of organisms, there are differences in the temperature at which growth begins (i.e., the minimum temperature at which growth and development begins).

Only when the average daily temperature is higher than the onset temperature of fertility can the temperature factor promote the growth and development of biological organisms. This fertility onset temperature is called the biological lower limit temperature (also known as biological zero) and is denoted by the symbol b.

When calculating the accumulated temperature required by crops, the following principles should be followed: The calculation period should be divided according to the growth and development period of crops; Only the average temperature values of each day that are higher than or equal to the b value in that period are accumulated.

The accumulated temperature is divided into active accumulated temperature, effective accumulated temperature, negative accumulated temperature, ground accumulated temperature, daily accumulated temperature, etc.

Calculation methods of various accumulated temperatures:

Active accumulated temperature. The average daily temperature above or equal to the lower limit of biology is called the active temperature. The sum of the active temperature is called the active accumulated temperature (AA), which is suitable for the calculation of a large number of data, and is mostly used in agroclimate research, and its calculation formula is as follows:

In the formula, i is the average daily temperature during the growth period, i=1,2....is the number of days in the fertility period. The calculation is calculated from the 2nd day of entering the reproductive period.

Effective accumulated temperature. The difference between the active temperature and the lower limit temperature of biology is called the effective temperature. The sum of the effective temperatures during the growth period is called the effective accumulated temperature (A-value).

It does not contain temperatures below the b value, so it is a better characterization of the heat required for the growth of biological organisms. It is mostly used to calculate the development rate of biological organisms.

According to the above formula, the values of a and b can be determined by using the parallel observation data of agrometeorology, the least squares method, the ** method or the experimental method.

Other accumulated temperatures. The accumulation of the daily average temperature below zero in winter is called negative accumulated temperature, which indicates the degree of severe cold, and is used to analyze frost damage to overwintering crops. The accumulation of daily average soil temperature or mud temperature is called geocumulated temperature, which is used to study the problem of crop seedling stage and rice chilling injury.

The accumulation of the day-to-day mean temperature is called the daily accumulated temperature, which is used to study the caloric conditions of certain crops that are sensitive to daytime temperature.

The calculation of accumulated temperature is generally like this, the time period is generally selected as a year, becoming the annual accumulated temperature, the critical value is free to choose, if used in agriculture, the minimum temperature at which crops can grow normally is generally selected, such as 10

At present, the relationship between crop ripening and 10-year accumulated temperature in China is as follows:

2300 a year, a year.

2300 -4500, two years of three crops to a year of two crops 4500 -8000, a year of two crops to a year of three crops of more than 8000, a year of three crops.

Calculation method (taking 10 as the critical temperature and 1 year as the time period as an example):

Add up the values of 10 for all the 365 days of a year to get the annual accumulated temperature for that year.

Taking one of the weeks as an example, the average daily temperature for the 7 days of the week is , then the accumulated temperature of the week = 12 + 11 + 10 + =

In the cycle of a year, the fruit tree must reach a certain total temperature to complete its life cycle, and the sum of the day and night temperatures above a certain temperature value is usually called the accumulated temperature. Generally, the biological zero degree of fruit tree germination is 3 10, and the effective accumulated temperature in the growing season is 2500 3000. From budding to flowering, a certain amount of accumulated temperature is required.

Table 1-2 shows the average trends of various fruit trees. Different types of fruit trees require different total accumulated temperatures throughout the development period. Accumulated temperature is an important factor affecting the growth and development of fruit trees, which can directly promote or delay their phenological period.

This characteristic is not only the genetic characteristics of fruit trees, but also the main basis for the development of economic cultivation area division in fruit trees.

Table 1-2: Accumulated temperature of major fruit trees during flowering and fruit ripening.

1. Accumulated temperature refers to the sum of the daily average temperature 10 during the duration of a certain period of time, that is, the sum of the active temperature, referred to as the accumulated temperature. It is an index to study the relationship between temperature and the development rate of biological organisms, and represents the influence of temperature on the growth and development of biological organisms from two aspects: strength and duration.

2. The accumulated temperature is generally based on the nuclear Chang · daily rent mill (d· ) for units.

3. Classification of accumulated temperature: active accumulated temperature, effective accumulated temperature, negative accumulated temperature, ground accumulated temperature, daily accumulated temperature, etc.