The cultivation value of pears is extensively cultivated in the north and south of the country. The economic status of the deciduous fruit trees is second only to apples, and the adaptability to the terroir is stronger than that of apples, regardless of hills and mountains.
Sandy land and sandy land with high salt content can be planted. Pears are resistant to extensive management and are easy to produce as early as possible. They have great potential for production and long economic life. Fruit storage and transportation
, Good merchandise, long supply period, welcomed by domestic and foreign markets. In addition to cultivation in large areas, pears are also suitable for scattered cultivation behind crowds' houses. Pear product
Variety of species can be selected according to local conditions.
The main species and variety profile Rosaceae Pyrus, rich in resources, mainly for economic cultivation of domestic five species, namely Qiuzi pear, pear, pear, pear and Xinjiang pear
. In addition, wild species such as Du Pear (Avocado), Bean Pear (Pear), Brown Pear and Chuan Pear are often used as root stocks for pears. White pears are suitable for freeze-drying
When cultivated, Sand Pear is suitable for warm and humid climate cultivation. It is the main species of cultivated pears in the Yangtze River and Huaihe River Valley. Pears require the same climatic conditions as Pear, suitable for
Huaibei cultivation.
The main varieties in the Pear system include Yali, pear, snow pear, and Laoshan white pear, and they are listed in the old course of the Yellow River in Huaibei and in Tongyan, Jiangsu.
It is good now. The main varieties of Shali system are Cuifu Pear, Huanghuali, Xingshui, Zhushui, New Century, Kikusui, and Late Sanji.
Its southern region performed well. The representative species of the pear system is Pear, and the adapted climate conditions are relatively narrow, but there are hybrids related to the pear system, such as Taiping.
Pears (iron heads), early crisps, etc., have a certain distribution area in the Yangtze River and the Huaihe River basin and the areas south of it, showing strong resistance, wide adaptability, and high yield.
Growth results habits and requirements for environmental conditions
1. The habits of growth results are similar to those of apples in many aspects, but pears have many characteristics. The roots of pears generally grow faster than apples
Stout and developed, less lateral roots. The regenerative ability of the root system is strong, and it is easy to heal and generate new roots after injury, and it is easy to produce roots. Roots of adult result trees
There are two growth peaks in the year. The first time around the basic stop of the shoot until the advent of high temperature, the second time after the fruit is harvested, the nutrients reaccumulate.
With the above shoots and fruit growth showed mutual growth.
In the growth habit of shoot buds, most of the pear varieties are more dry than apples and have a small branching angle, and the typical tight conical shape is often exhibited in young trees.
Crown. The cutting tip of the backbone is smaller than that of the apple, and the crown is easy to droop after the fruit stage. The apical dominance of pears is particularly strong and the germination rate is high (most species can reach 80
% or more), low branching power, and canopy layer. This is most prominent in many Japanese pear varieties in the Shari system. The vast majority of new shoots are longer
Early, only once in spring, the contradiction between nutrient competition with young fruit is small. Pear life longer than apples. Branch buds often have buds in the bud,
After budding, the scales fall off and the secondary buds become buds at the base of the shoots. These hidden buds are an important basis for pears to rejuvenate, so the economic life of pears
The tree age is longer than that of apple.
In terms of flowering fruit habits, pear flower buds are easier to form and generally have suitable results, especially for varieties with high germination rate, low branching force, or bud blossom buds.
The result of the strength of the breed is earlier. As with apples, the fruiting branch of a pear is actually a result of a mother branch, which can be divided into long fruiting branches, middle fruiting branches, short fruiting branches, and pods.
Buds 4 different types. Adult pear trees are dominated by short fruit branches. Only pears that grow vigorously and some sand pear varieties have some medium and long fruit branches. Flower bud
Mixed buds, top or lateral. The result is a new negative and short, corymbose inflorescence. After the flowering result, the result is that the new expansion will form a fruit stage, and the fruit stage will be produced on it.
Tips 1 to 3, when the conditions are good, can be continuously formed flower buds, but often in the second year of the results can be re-formed flower buds, the results every other year. Fruit bench
The shoots are repeatedly branched into short fruit branch groups. A short fruit branch group can maintain fruiting capacity for 2 to 6 years, and can grow for up to 10 years. It varies according to varieties and tree nutrients and other conditions.
. As the tree age grows, the fruiting ability of short fruit bunches declines. In the buds of pears, snow pears and other varieties, often only inflorescence but no basal leaves and fruit
Auxiliary shoots are mixed shoots with incomplete development.
Most of the pears first bloom after the exhibition of leaves, a few varieties of flowers with the exhibition or the first after the leaves. There are 5-8 flowers in each inflorescence, and the outer flowers are opened before the center flowers
. The flower rate of the flower that blooms first is high, the fruit development is decisive, and the quality is good. Some varieties of pears in the summer and Chinese pear varieties fall in the early autumn,
There are also secondary flowering phenomena. Pear is a fruit tree with highly cross-pollination. When the same variety is self-pollinated, it cannot be substantial or its seed setting rate is extremely low. When different varieties are pollinated
The fruiting rate is often higher, among which Yali pear, Taiping pear, New Century, Kikusui and Ermiyabai are all varieties with high fruiting rate. When there is too much fruit, the fruit
It is smaller and can easily cause large and small annual results. However, there are varieties with low fruit rates.
There are two physiological fruit drops during fruit development. The first time in 5 to 10 days after flowering, it was mainly due to pollination and incomplete fertilization. The second time after flowering 4-6
Around the week, it was mainly caused by the competition between the organs. Two falls will be exacerbated by poor weather.
2. The demand for pears for environmental conditions depends on the different systems of their genus. White pears and pears require a cool, dry climate at an annual average
Areas with temperatures greater than 15 C should not be cultivated. For example, if pears are cultivated in areas with high temperature and high humidity, the fruit shape will become smaller and the flavor will change to lose the original quality. Press pear
More resistant to hot and humid, suitable for cultivation in the Yangtze River basin and its south. Pear buds sprouted and blossomed earlier than apples and were sometimes affected by the “cold springâ€.
Frozen flower buds or flowering frost is a phenomenon that results in reduced yields. The optimum temperature of photosynthesis of pear leaves is higher than that of apple. The temperature difference between day and night during the later stage of fruit development is great.
To improve the quality of the fruit.
Pear tree hi light. The light compensation point is higher than Apple. Precipitation requirements vary widely among different pear systems. The annual precipitation of high-quality Bai pear producing areas in China is
500 mm to 900 mm. However, Shali is highly moisture-resistant and grows well in areas with an annual precipitation of 800 mm to 1000 mm or more.
. Pear, originally produced in the summer climate zone, has strong drought tolerance. When cultivated in the south, branches tend to be long and serious. Regardless of any system of pear, the fruit before the rain matures
Too much, lack of light, will reduce the quality of the fruit.
Pears do not require strict soil, and are more resistant to dampness and salinity. The soil salt content is less than 0.2%, PH value in the range of 5.8 to 8.5, can plant pear trees.
However, it is ideal for deep sandy soils or well-drained sandy soils or light soils. When the soil is too thin, the fruit development is hindered, the stone cells increase, and the meat changes.
Hard, less juice and poor flavor. Pears avoid strong winds during fruiting. The typhoon between July and September in the coastal area has a great impact on the fruit, especially the varieties with short stems
Serious damage.
fresh frozen CPDTO vannamei
Cpdto Vannamei Shrimp,Frozen Cpdto Vannamei,Fresh Cpdto Vannamei,Fresh Frozen Cpdto Vannamei
Zhoushan Junwei Aquatic Products Co., Ltd. , https://www.junweiaquatic-intl.com