What temperature zone is the most suitable for pear growth

Temperate zone, where the four seasons are distinct, is suitable.

Different varieties of pears have different needs for temperature. Autumn pear.

The most resistant to low temperatures, can withstand -45 -33, white pear.

It can withstand -25 -23, and sand pear and Western pear can withstand ultra-low temperature within -20. There are also differences between different species, such as apples and pears.

Resistant to -32, the bright moon in Japanese pears, can withstand -28, which is more resistant to low temperatures than other similar pears. Apricot.

The northern boundary of economic development planting is closely related to the average temperature in January.

white pear, sand pear, not less than -10; The western pear is not less than -8, and the autumn pear has the lowest temperature of -38 in winter as the index value of the northern boundary. The growth period is too short, and the heat is generated.

Insufficient is the limiting factor, and the planting boundary is clearly more than 10 days and not less than 140 days. The cooling capacity of apricot trees is generally less than 1400 hours, but the difference between the types of green plants is very large, such as Yapear.

It takes 469 hours to make a pear, <>

Korla fragrant pear.

It takes 137 hours, and the small evaporator of autumn pear reaches 1635 hours, and the sand pear is the shortest, and some even have no significant dormancy. If the temperature is too high, it is not suitable, and when it reaches 35 or above, the physiology is hindered. Therefore, white pears and pears are not suitable for planting at an average annual temperature of 15, and autumn pears are not suitable for planting at 13.

The enlightenment and iron head in sand pears and Western pears, and the Serkefu in Xinjiang pears can withstand heat. The temperature conditions in the key topographic areas of various pears in our country are <>

Table 7: Temperature in key topographic areas of various pears ( ).

The apricot tree blooms at a temperature of about 10, and when it is above 14, it blooms faster. The temperature of pear bee pollen budding is about 10, and when it is less than 24, the pollen tube stretches faster. Some people feel that when the flowering period is -1 3, the pots need to be damaged by the difference level.

However, the sudden change of cold after the temperature rises in spring can also cause damage, usually when the temperature has not dropped to a very low temperature. The flower buds of pears are differentiated, and the temperature around 20 is the best.

In the whole process of perfecting the fruit, the temperature difference between day and night is large, the night temperature is low, the day temperature is high, and the assimilation effect is strong, which is beneficial to coloring and sugar accumulation.

The planting temperature is not lower than -10. The usual temperature is not lower than -8, so that the pear tree can grow well.

The temperature must be kept between 25 and 28 degrees, and in the process of planting pear trees, in addition to ensuring temperature, ventilation must be ensured, and the soil must be particularly fertile and moisturized.

About 15 degrees is suitable. It is important to ensure sufficient temperature so that the pear tree can thrive and not affect the yield of the pear tree.

The best temperature should be between 15 and 20 degrees. It is best not to exceed 30 degrees, if it does, there may be some undesirable situations.

Pears are more adaptable to the external environment than apples. Cold-tolerant, drought-resistant, waterlogg-tolerant, salinity-alkali tolerant. In areas where the lowest temperature in winter is above -25 degrees, most varieties can safely overwinter.

Pear trees grow and require more water. The transpiration coefficient is 284-401, and the transpiration moisture per square meter of leaf area is about 40g, and when it is less than 10g, it can cause injury. Autumn pear, white pear, and Western pear have poor moisture tolerance, and sand pear has strong moisture tolerance.

In sandy loam soil, when the soil moisture content is 15-20%, it is more suitable for root growth, and when it is reduced to 12%, root growth is inhibited. Soil. The pear tree has strong adaptability to the soil, and the sandy loam soil with deep soil layer, loose soil, good water permeability and water retention performance, and low groundwater level is the most suitable. The pear tree has a wide adaptability to soil acidity and alkali, and the pH value can grow normally within the range, which is considered to be the most suitable. The pear tree is also more tolerant to salinity and alkalinity, and the soil salt content grows normally below the soil level, and when it reaches above, the root growth is damaged and the growth is obviously poor.

Generally, pear is required to be alkaline, while sand pear and bean pear are required to be acidic.

1. Pears generally ripen in July and August, and are harvested from early September to late October.

2. In terms of flowering and fruiting habits, pear flower buds are easier to form and can generally bear fruit in a timely manner, especially varieties with high germination rate and low branching ability, or varieties with axillary flower buds bearing strength and bear fruit earlier. The fruiting branch of pear is actually a fruiting mother branch, which can be divided into four different types: long fruit branches, medium fruit branches, short fruit branches and axillary flower bud branches.

3. After the adult pear tree bears fruit mainly with short fruit branches, the new shoots swell to form a fruit platform, and 1 3 secondary shoots are produced on it, and when the conditions are good, the flower buds can be continuously formed to bear fruit, but often need to form flower buds again in the second year of fruiting, and bear fruit in alternate years.

Pear trees are tall deciduous trees that share many similarities with apple trees. It is taller, stronger, and longer-lived than apple trees, with stronger dryness and layering, and is also prone to early flowering and continuous fruiting. The top advantage is very obvious, and it is easy to form a strong upper and lower weakness and an outward shift of the fruiting part.

The germination rate is high, and the branching ability is weak. As a result, there are many large branches and few branches, and the canopy often appears sparse. The root taproot is well developed, the distribution is deeper, and the stratigraphy is more obvious.

Young trees have more erect branches and tend to grow with their heads in their hands. However, the newly planted seedlings have slow recovery from root wounds, few roots, and a long seedling period.

The branches of the upper part of the old tree are still erect and vigorous, but the growth of the lower branches is very weak, often forming a group of short fruit branches, which the fruit farmers call "chicken claw branches", and there are often leaf clusters and branches that die, forming a bare belt. There are many latent buds, long life, easy germination, and are conducive to the renewal and rejuvenation of old and weak branches.

1. Pears generally ripen in July and August, and are harvested from early September to late October. The fruit of pears is usually used for eating, not only is it juicy, sweet and sour, but also nutritious, containing a variety of vitamins and fiber, and different kinds of pears have completely different tastes and textures.

2. Pears, also known as Ya pears and large Ya pears, are harvested in early and late according to different varieties, and most of them ripen in July and August. The growth cycle is very long, some varieties start to bear fruit in 2-3 years, and the whole fruiting period can be as long as more than 50 years.

1. Pears ripen in autumn. Pears generally ripen from July to September, and pears have the fruits of white pear, sand pear, autumn pear, Western pear, etc., which are mostly distributed in North China, Northeast China, Northwest China and the provinces of the Yangtze River Basin. In the autumn when the climate is dry, people often feel itching, dry mouth and nose, sometimes dry cough and less phlegm, eating one or two pears a day can relieve autumn dryness, which is good for health.

2. Nutrients: The pear fruit is delicious, the meat is crisp and juicy, sweet and sour, and the flavor is fragrant. Rich in sugar, protein, fat, carbohydrates and a variety of vitamins, it plays an important role in human health, the sugar content of pears is less than 15%, and the daily consumption can be 300-500 grams.

3. Pears can also be processed to make dried pears, preserved pears, pear paste, pear juice, canned pears, etc., and can also be used to make wine and vinegar. Pear wood is delicate, moderately soft and hard, and is the raw material for carving seals and high-end furniture.

Pear growth habits.

Pears are a very adaptable plant. It is hardy to cold, drought, humidity, and salt. When the pear is maintained in winter, it can be planted in areas above -25 degrees, and many varieties of pears can be safely wintered.

Characteristics of the appearance of pears.

The pear fruit is round or oblate, the top and bottom are uneven, the fruit surface is yellowish-white, the stem is short, the skin is thin and covered with small stars, the flesh is milky white, it tastes crisp, juicy and sweet.

Environmental conditions for the growth of pears.

Pears can be grown in a variety of soils, but when the soil is fertile, pears grow better, produce more fruit, and have higher fruit quality. Pears can be grown in mountains, hills, deserts, depressions, saline-alkali lands, and red soils, but different varieties can be grown in different regions.

Pear growth process.

Pears generally grow through the seedling stage, the growth period, the flowering stage, the fruit drop stage, the fruit expansion stage, and the fruit ripening stage. Pears first have leaves and then bloom in the spring, but unlike apples, in the same inflorescence, the inner flowers of pears bloom earlier than the central flowers.

Potted pear cultivation points.

Planting: When planting potted pears, choose strong seedlings. First, the seedlings are placed in a soil pit, filled with soil near the edge, watered properly when filling the soil, and then compacted the soil.

Pruning: Potted pears need to be pruned for 1 year, and the treetops should be pruned after 3 years. In addition, it is necessary to fertilize properly to ensure that the plants have enough water.