Weather in Beizhen 15 days

Autumn weather is dry, suitable for eating more pears.

Overview of pears:

Pear (pear, English name: pear) belongs to Rosaceae. Usually the species are deciduous trees or shrubs, a few species are evergreen, and the leaves are mostly oval, and the size varies from species to species.

Morphological characteristics:

The root system is developed, the vertical root depth can reach more than 2~3m, and the horizontal root is widely distributed, which is about twice the crown width. If you like light and temperature, you should choose gentle slope mountains with deep soil layer and good drainage, especially sandy loam mountains. Strong sense of dryness and obvious layering. Early fruiting and long fruiting period, some varieties begin to bear fruit in 2-3 years, and the complete fruiting period can reach more than 50 years.

Distribution range of pear trees:

Pear trees are widely distributed, so their phenological periods are very different. As far as flowering period is concerned, Huili and pear trees in Sichuan generally bloom in the first half of February, and Yanbian in Jilin blooms in mid-May. Yali pear bloomed in Changsha, Hunan Province in early March and in Beizhen, Liaoning Province in early May, with a difference of nearly two months.

Pear trees cultivated in the same area have different phenological periods due to different species and varieties. From germination to flowering, Qiuzi pear is the earliest, Pak Lei pear is a little later, Shali pear is later than Pak Lei pear, and Xiyang pear is the latest, and the variation range is about 10 day.

Growth habit of pear:

1, temperature

Pear trees like temperature, which requires higher temperature for growth and lower temperature for dormancy. The suitable annual average temperature of pear trees is 4- 12℃ for Qiuzi pear, 7- 15℃ for Pak Lei and Xiyang pear, and 13-2 1℃ for Shali pear. When the soil temperature reaches above 0.5℃, the roots begin to move, and new roots grow at 6-7℃; When the temperature is above 30℃ or below 0℃, the growth will stop.

When the temperature is above 5℃, pear buds begin to germinate, when the temperature is above 14℃, they can blossom, and when the temperature is above 14℃, the flowering is accelerated. Pears have different cold tolerance. Qiuzi pear, which originated in northeast China, is extremely cold-resistant, and its wild species can tolerate -52℃ and its cultivated species can tolerate -30-35℃. Pak Lei class can withstand-23-25℃; Sand pear and sand pear can tolerate about -20℃.

The critical freezing temperatures of pear organs in Laiyang, Shandong Province are -5℃ in bud stage, -3.5℃ in inflorescence separation stage,-1.5-2℃ in flowering stage and-1.5℃ in flowering stage.

2. Lighting equipment

Pear tree is a high-gloss fruit tree. The annual sunshine demand is between 1600- 1700 hours. The light compensation point of pear leaves is about 1 100 lux (lx), and the light saturation point is about 54,000 lux (lx).