American black grape viticulture

The core tips: The establishment of the park is based on the leeward sunny slopes, and the soil quality requires fertility and water conservation of sandy soil or loam. Before planting, excavate planting trenches 100 cm deep and 80 cm wide. Gully bottom 667 m2 soil miscellaneous fertilizer 4000-5000 kg. Seedlings were selected last year to be seedlings or cuttings, requiring more fibrous roots, robust branches, and full buds. Before planting, the seedlings were soaked in fresh water for 1-2 days to allow the seedlings to absorb enough water. Then colonization of the plantation

The leeward sunny slopes are good, and the soil quality requires fertility and water conservation of sandy soil or loam. Before planting, excavate planting trenches 100 cm deep and 80 cm wide. Gully bottom 667 m2 soil miscellaneous fertilizer 4000-5000 kg. Seedlings were selected last year to be seedlings or cuttings, requiring more fibrous roots, robust branches, and full buds. Before planting, the seedlings were soaked in fresh water for 1-2 days to allow the seedlings to absorb enough water. Then according to the size of seedlings, dig holes and colonize. The row spacing is 1 meter 2 meters, and 667 meters of 667 meters is better; after planting, it is irrigated with water to make the seedlings sink.

Fertilizer management Grapes can be topdressed 3 times in the year of planting to promote robust seedling growth.

(1) In early June, 50 g of diammonium phosphate and 50 g of urea were applied.

(2) In early August, 150 grams of compound fertilizer can be applied.

(3) Completed in early October, can apply 100 g of diammonium phosphate or 150 g compound fertilizer. After the first winter cut, 667 m2 of organic fertilizer was applied for 3,000 kg and compound fertilizer was 100 kg. Later, according to the growth characteristics, in the new shoot long growth, berry enlargement and other fertilizers require more time with 0.3% potassium dihydrogen phosphate, 0.3% -0.5% urea solution foliar spray fertilizer. The blackish grape needs a large amount of water for growth. In addition to pouring enough water while fertilizing, it can appear before and after the budding of the grape, inflorescence and before flowering, after flowering and before the coloring of the berries and the soil, according to the degree of soil moisture and rainfall. Pouring enough water.

Pruning

Should adopt single-armed fence wall shape, that is, after the seedlings sprout, in the main vine 60-80 centimeters to pick the heart to dry; trunk picking heart left after the above two side buds to form a secondary tip, when the sub tip length to 60 centimeters or so, stay 50 centimeters topping, tied flat on the first layer of wire to form two arms; the first layer of iron wire is about 60 centimeters from the ground. Auxiliary shoots on arms can leave 5-7 leaves topping, leaving 1-2 leaves to pick up. After each winter cut, it is sufficient to cut the result of the mother branch on both arms. Usually 4-6 results of mother branches per arm. Each year, the short shoots of the mother shoots are trimmed, and the remaining shoots can hang naturally.

Flower and fruit management

Black grapes have large spikes and closely packed fruit. Sparse fruit should be cleared as soon as possible. In the inflorescence stage or in the post-anthesis granulation stage, the extra large panicles, abnormal panicles, and extra spikelets may be removed. It is advisable to use no more than 1000 grams of panicles per panicle to remove the panicle tip. In combination with summer pruning to remove tendrils, brushing buds, and sparse branches, the secondary inflorescences are removed and the small grains and deformed grains in the ear are removed. Over-tightening can remove some of the fruit.

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