Marshal is an excellent variety.
(2) Site conditions.
Sandy loam and loam with deep soil layer and good drainage, with an altitude of 1000m to 1600m, an organic matter content of ≥0.9%, a pH value of 6.5-8 and a groundwater level below 2m.
(3) Seedling breeding.
Select mother plants with strong growth, no quarantine pests and diseases and good quality to collect scions for grafting and seedling raising.
(4) Cultivation management.
1, landscape architecture:
(1) Planting time: spring or autumn.
(2) Planting density: the planting density of common varieties/rootstocks is ≤840 plants/hectare, and the planting density of short-branch varieties/rootstocks is ≤990 plants/hectare.
2. Fertilizer and water management: Fertilization includes base fertilizer, topdressing and foliar spraying. The base fertilizer is mainly farmyard manure. Apply organic fertilizer ≥45 tons per hectare at full fruit stage. Timely irrigation according to soil moisture.
3. Shaping and pruning: the tree mainly adopts small crown sparse layer shape, free spindle shape and slender spindle shape. The number of branches per hectare is ≤ 654.38+0.2 million.
4. Flower and fruit management: implement flower and fruit management techniques such as re-cutting before flowering, pollination at flowering stage, thinning flowers and fruits, picking leaves and turning fruits into single fruits.
(5) harvesting and storage.
1. harvesting: from late August of 10 to early October of 10, harvesting will be started when the soluble solid content of fruits reaches more than 12.5%.
2. Storage: precooling and warehousing in time after harvesting. Normal temperature storage ≤ 15 days, and controlled atmosphere storage ≤240 days.
(6) Quality characteristics.
1. Sensory characteristics: This project requires the fruit to have a straight shape, a high pile and a pentagonal protrusion at the top. The fruit shape index is more than or equal to 0.85, the color is strong red or bright red, and the coloring degree of the fruit is over 95%. The maturity is fully developed, reaching the maturity required by the market or storage, and the fruit stalk is completely or evenly cut off.
(Divided by the transverse diameter of the fruit) The surface of the fruit with mm ≥70 has no defects (including stab wounds, crush injuries, abrasions, hail injuries, lacerations, insect injuries and diseases) 2. Physical and chemical indexes: peel hardness required by the project, kg/cm ㎡? More than 6.5 (stored fruit ≥4.5) soluble solids,% ≥ 12.5 titratable acid,% ≤0.3 solid-acid ratio ≥ 35: 1. Producers within the scope of protection of geographical indication products of Huaniu and Apple may apply to Tianshui Bureau of Quality and Technical Supervision of Gansu Province for the use of "special signs for geographical indication products", which shall be approved by the AQSIQ.
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