Chestnut awning prevention measures

Chestnut awning prevention measures

Causes of chestnut emptiness are due to lack of nutrients or lack of boron, in addition to varietal characteristics. Its comprehensive prevention measures are as follows: Improved varieties. The improved species with high suspoduction rates and low yields of high-yield trees were selected. 2. Focus on pruning. For trees that are emptied due to weak tree vigor, one-to-two result parent branches are retained during pruning, and the remaining weak branches are all eliminated; branches that are overlapping, overlapping, over dense, and fruitless are timely sparse. Or retract. If the resulting parent branch of the shoot is too weak, it should be retracted in time. Add organic fertilizer. After autumn harvest, organic fertilizer is applied and flower buds that promote differentiation are full and full. The amount of fertilizer is controlled at 100 kg per plant, plus 0.5 kg-1 kg of urea and 250 kg of bio-potassium. If the organic fertilizer is insufficient, chestnut-specific fertilizer can be used instead of 4 kg-5 kg ​​per plant. The application method is guttering, with a groove width of 30 cm and a depth of 50 cm. Note that the fertilizer and the soil are mixed and applied to the groove, and then the soil is covered. 4. Pressure green manure. For the mountain chestnut trees with high arborization rates and insufficient organic fertilizer sources, green manure is applied from late July to early August. As a result, the tree pressure was about 50 kg per plant. The method is to evenly spread the green manure in the tree tray, and then apply 5 cm to 10 cm soil to the green manure. If the manure is covered nearby, the effect will be better. Green manure can also be preserved. 5. Clever use of boron fertilizer. 1 Boron applied to the soil: combined with organic fertilizer applied in the fall, the result was that each tree was applied with 100 grams of borax - 200 grams, and boron was applied once every other year. The trees with severe awnings can be excavated in spring in the periphery of the crown - eighty - twenty - centimeters deep 30 centimeter fertilization points. Sprinkle 100 grams - 200 grams of borax into the holes and pour a little water until the water seepage. 2 Spraying boron on the leaf surface: spraying once at the flowering stage - 0.3 times borax solution of 0.3%, can significantly reduce the platyphora rate, but the effect is not as good as the soil boron application. In general, these two methods are used together and the effect is very good. 3Breathing on the tree trunk: In the early flowering period, drill a diagonally downward hole on the trunk about 1m from the ground, deep to the medullary heart, and then dilute to 0.5x10 (upper right-6) with 0.5g of available boron, and put it in the infusion bottle. Hang upside down on the tree trunk, and then use the infusion tube to slowly drip into the tree body through the hole in the trunk. The advantages of this method are water saving and quick results. 6. Remove male flowers. During the thinning period, the mixed inflorescences at the ends of the fruiting branches were revealed, and the base of the male inflorescences was 4 cm to 7 cm in length. Artificially removed male flowers can only retain the inflorescence at the end of the resulting shoots, and all others are removed (including the male inflorescences on the lower part of the fruiting branches and on the male flowering branches). Chemical fertilization can be used chestnut salbutamol 1000 times spraying the canopy in late May, can fall early male 30 days - 40 days, spawning rate of more than 80%.

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