Selection and planting techniques of Pear seedlings
The selection of pear seedlings: the plant height is more than one meter, the stem is thicker than 0.8cm, the bud is full, the root system is developed, there is no disease and insect, and the cortex is not wrinkled. Pear seedlings with wrinkled stem bark are mainly caused by early seedling and poor moisturizing, which is disadvantageous to rooting after planting.
With regard to the planting technology of pear seedlings, in order to improve the survival rate of pear seedlings, the following points should be done at the timing of pear seedlings:
1. Match the pollination tree well. When planting pear seedlings, it is necessary to plant pollination trees, and the ratio of pollination trees to main tree varieties is 1RU 4ml 6, and inter-row planting is better.
2. Reasonable planting density. Early-maturing varieties planted about 83 plants per mu (plant spacing 2 × 4m), and mid-late-maturing varieties planted about 42mi / mu (plant spacing 4 × 4m-4 × 3m).
3. Dig holes before planting. The depth of the hole is about 50-60cm, and the fully mature organic fertilizer is 50-60 kg per plant, and the planting soil is about 15cm higher than the border surface.
4. Clean up the seedling roots. When planting, the roots of seedlings should be properly cut off 3-4cm to facilitate rooting. When planting, the grafting joint should be exposed to the ground, the root soil should be solid, and thin human manure should be applied to promote the survival and rooting of the seedlings. In order to prevent root diseases, 50% carbendazim 600x solution can be used to irrigate the roots, each plant irrigated with about 150ml.
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Cultivation techniques of Ziziphus jujuba
The varieties come from the local varieties of Jishan, Shanxi. Variety characteristic fruit flat Obovate, vertical diameter 3.2-3.4 cm, horizontal diameter 2.7 cm, lateral diameter 2.4 cm, single fruit weight 11.2 grams, the size is neat. The fruit surface is not very smooth, with vertical ups and downs; the pericarp is purple-brown or purple-black, medium thick, glossy; the pulp is dense, slightly crisp, more in juice, sweet, high quality and so on. Suitable for dry and fresh food. The tree has strong potential and medium branching power, and can bear a small amount of fruit in the same year after planting.
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Golden Pear
1. The variety was introduced from Korea by Beijing City Forestry Bureau in 1999 and planted in Huangfa Nursery of Beijing City. Parental combination: New high × twentieth century. Approved by Beijing City in 2002. 2. Characteristics This variety was bred by Korea and belongs to sand pear system. Strong tree vigor, tree posture semi-open shape, easy to form short fruit branches and axillary flower buds, 7-9 flowers per inflorescence. The leaf blade is broad elliptic, the leaf margin serrations are bigger, the leaf blade is dark green, the vein is clear. Annual. Branches reddish brown, lenticels large and
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