American hybrid apricot and plum, with its unique flavor, excellent quality, attractive appearance and pulp color, outstanding storage and transportation resistance and high economic value, will have a far-reaching impact on the variety structure adjustment of the world fruit industry, and is recognized as the most valuable new fruit tree variety in 2 1 century. The national "948" world famous fruit introduction project * * * introduced 9 American apricot and plum varieties, and all the results were obtained in Nanyang United Base of Hengtang Agricultural College in Lu 'an City, Anhui Province. The introduction and popularization of American hybrid apricot and plum has great economic and social benefits, which provides new opportunities for fruit farmers and will certainly make greater contributions to the structural adjustment and upgrading of China's fruit industry.

American hybrid apricots and plums bear fruit in the second year after planting, and have a high yield in the fourth year, with an yield of 2500 kg per mu. There are few pests and diseases and strong adaptability, and apricot and plum can be cultivated in most areas where they are suitable for growth.

1. planting: the planting time is from the end of June 10 to March of the following year. The planting density is generally 2m×3m or 2m×4m, and the planting area is11or 84 plants/mu. Dig permanent planting holes or long ditches with fixed values and apply more farm manure. Pile the topsoil between rows into a planting bed or tree tray 30cm above the ground and plant it on it. Not suitable for deep planting. Nine hybrid apricots and plums are cross-pollinated, and the ratio of main cultivated varieties to pollinated varieties is 8: 1.

2. Fertilizer and water management: from late June of 65438+1October to early October of165438+1October every year, base fertilizer is applied in combination with deep ploughing and hole enlargement, that is, ditches with a depth of 60cm are dug around the planting holes or on both sides of the planting ditches, and filled in the ditches. 2 kg of compound fertilizer should be applied to each plant. Top dressing 3-4 times a year. Water after each fertilization. In terms of water supply, it depends on soil moisture and water demand period, water supply should be ensured after fruit swelling period, and timely drainage should be paid attention to in rainy season.

3. Shaping and pruning: the tree adopts a natural heart shape or a two-layer evacuation heart shape, and the trunk is 40-50cm high. Prunes and prunes have strong growth potential. Young trees should be trimmed with light cutting and slow release, and the branches should be thinned. Comprehensive application of pruning measures such as coring, ring cutting and branch pulling, spraying paclobutrazol on leaves, inhibiting tree growth and promoting flower bud formation. In order to improve the ventilation and light transmission conditions of trees, attention should be paid to thinning excessive branches and sprouting branches during the growing season. Pull branches and open branches in autumn, and sparse the overgrown upright branches and competitive branches; In winter, pay attention to thinning overlapping branches, over-dense branches and branches with diseases and insect pests. Except for extremely thin and weak branches, other strong branches are not short-jointed. Results The number of fruit per plant was 150-250 in the early stage and about 500 in the full fruit stage.

4. Pest control: American hybrid apricot and plum have strong disease resistance. Common fungicides can control the occurrence of diseases all year round, and pest control can control the occurrence of various pests by spraying pesticides several times. Clean up the orchard comprehensively with winter scissors. Spraying 1 times 3-4 Baumido stone sulfur mixture in mid-February to eradicate the source of the disease. Bacterial perforation can be alternately treated with thiophanate methyl, mancozeb, carbendazim and Durex cream for 2-3 times. Aphids can be controlled by diphacinone and pyrethrins. And scarabs can be trapped and killed by artificial capture or black light, willow soaked in 5% phoxim EC, etc.