Where is the origin of western plum? What are the climatic and geographical conditions for planting western plum? What are the high quality varieties?

Plum flesh is sweet and fragrant, smooth in taste, rich in vitamins, antioxidants, dietary fiber, iron and potassium and other minerals, free of fat and cholesterol, which is indispensable for modern people's healthy diet. So where is prune grown? What are the climatic and geographical conditions for planting prunes? What are the high-quality varieties?

1. Where is the origin of prune?

West plum is native to southwest France, home to West Macy plum, which has a dark purple skin and amber flesh when ripe.

In 1848, a French planter came to California in the United States to look for gold. In 1856, prune seedlings were introduced to North America and grafted with D Agen prune seeds. The grafted trees came to California in the same year. By 1900, California prune plantations amounted to 90000 hectares, concentrated in Sacramento, Santa Cara, Sonoma, Napa, and the San Joaquin Valley, which now produce more prunes than anywhere else in the world, accounting for about 99% of total U.S. production and about 42% of world supply.

2. What are the climatic and geographical conditions for planting plum trees?

1. Climatic conditions for planting plum trees

Climatic conditions Annual average temperature above 9℃. In southern Xinjiang, peach is used as rootstock, the extreme minimum temperature is not lower than-22℃; apricot and rootstock are used as rootstock, the annual minimum temperature is not lower than-28℃, the absolute maximum temperature is 42-C; the frost-free period is more than 180 days.

2. Geographical conditions for planting plum trees

Afforestation land should choose deep soil layer, groundwater level lm below, soil texture for medium loam, light loam, sandy loam and sandy soil. Soil pH 7-8.5, total salt content of root layer (depth 10-60-m) 0.35%.

III. What are the high-quality varieties of western plum?

At present, the best performing prunes are: France, Red Plum, Blue Honey and Stanley.

They are described as follows:

1. France: Also known as French plum. This variety has wide adaptability, strong resistance, moderate tree body, oval leaves and mainly short branches. The fruit is ovoid, with papillae on the fruit stalk. The pericarp is dark purple when mature. The flesh is light yellow. The hard core of the flesh is sweet and sour. The average fruit weight is about 76g. The quality is excellent. The soluble solids of the fruit are more than 20%. The fruit can be stored for 20-30 days at normal temperature and more than 3 months in cold storage. The fruit ripens in the middle and late august in beijing area. It is in recent years in the market price and response are very good high-grade fruit.

2. Red plum: fruit oval, suture shallow, symmetrical flesh on both sides; stem depression wide and shallow. Red plum fruit face rose red, by fruit powder, flesh is pale yellow. The meat is tough, juicy, sweet, fragrant, fine and fiber, good quality, soluble solids content 18.5%, the highest 23%. From nucleus, nucleus small. Average fruit weight 75g, maximum 120g, no fruit cracking or dropping phenomenon before maturity, high yield. After maturity, it can hang fruit on trees for about 20 days, and the flesh is not soft. It can be stored for 90 days under general refrigeration conditions and 2-3 weeks under indoor normal temperature. Beijing area ripens in mid-late august.

3. Blue honey: namely Romania plum, fruit oval, average fruit weight 55g, maximum 110g, deep suture line, slightly asymmetric, fruit surface 100% blue-black, fruit powder thick, gray-white, thick pericarp, yellowish green pulp, hard and tough, less fiber, more juice, sweet taste, soluble solids content 16%, small stone, nuclear separation, excellent quality. This variety is self-flowering and has high and stable yield. The fruit ripens at the end of August in Beijing.

4. Steinley (Steele): The fruit is oval, the fruit surface is purple and black, the weight of each fruit is about 50g, the flesh is light yellow, sweet, juicy, and the flesh contains about 18% solid matter; it matures in the middle of September in Beijing. This variety has good quality, good flavor, early fruit and high yield.