Ten taboos in nectarine planting and nectarine grafting techniques

Will nectarines cause internal heat? Can we eat a lot? Let me tell you whether nectarines cause internal heat.

Some knowledge about nectarine

We all know a lot about nectarines. The main characteristics of this kind of peach are that it is easy to store and transport, and it does not affect the taste. Therefore, nectarine is a fruit of relatively high quality. Do we know some precautions about eating this kind of fruit? For example, will nectarines cause internal heat? For questions like this, you can simply learn about this knowledge from the following articles. The following is some content that the editor has collected and sorted out in detail. Let us all learn about this related knowledge.

Ten taboos in nectarine planting

Avoid single variety

Although most varieties of nectarine are self-fertile, cross-pollination still has a high fruit set rate.

Avoid spraying dimethoate

Peach trees are sensitive to malathion and oxymalt, and spraying them can easily cause leaf scorch and fall. Therefore, try not to use malathion when controlling aphids. You can use imidacloprid, chlorpyrifos, etc. to control aphids.

Avoid heating too early

The premise of raising the temperature of nectarine trees in greenhouses is to meet their cooling needs (through natural or artificial refrigeration dormancy). Hebei, Shandong and other places generally start to raise the temperature in the greenhouse from late December to early January of the following year. Raising the temperature too early will cause abnormal phenomena such as uneven flowering and no pollen after flowering, reducing the fruit setting rate.

Avoid watering during flowering period

Watering during the flowering period can easily cause the ground temperature to drop and reduce the air content in the soil, thus causing flowers to fall and affecting the fruit set rate.

5. Avoid too high greenhouse temperature

When cultivating nectarines in facilities, do not raise the temperature too quickly at the beginning. Generally, the daytime temperature should be controlled at 10℃～25℃, the flowering period should be controlled below 23℃, and the maximum should not exceed 25℃; the temperature should not exceed 28℃ after fruit setting. If the greenhouse temperature is too high during the flowering period and the early stage of flowering, the flowering will be too rapid, the flower organs will not develop well, the flowering will be uneven, and the fruit setting rate will be low; if the greenhouse temperature is too high during the fruit development period, it will cause the new shoots to grow too long and aggravate the physiological fruit drop.

Sixth taboo: not covering the ground with film

Covering the ground with film can increase the ground temperature, avoiding the impact on fruit setting and growth due to high air temperature and low ground temperature, slow root activity, and uncoordinated growth of the upper and lower parts of the tree.

Seven taboos on using chlorine fertilizer

Peach trees are chlorine-averse plants. After applying chlorine fertilizer, the root system rots, the leaves turn orange, the tree becomes weak in mild cases, and the whole plant dies in severe cases. The eighth taboo is not to pollinate. The air flow in the greenhouse is poor, the air humidity is high, the anthers open slowly, and the pollen is sticky, resulting in less pollen in the air. Therefore, bees should be placed in the greenhouse or artificial pollination should be used to increase the fruit setting rate. The ninth taboo is to leave too many fruits. Leaving too many fruits will make the fruits smaller and have different colors, delay the maturity period, and make it difficult to sell the fruits. Therefore, the load should be reasonable. The tenth taboo is to water before harvesting. Watering before harvesting can easily cause cracking of fruits and pits, especially Huaguang nectarines. It can also cause poor coloring of peach fruits, reduce sugar content, and delay the maturity period. Greenhouse nectarine bud grafting and head replacement method Sunlight greenhouse nectarine bud grafting and head replacement will not affect the fruiting of the current year or the next year, and can maintain the original low tree shape, and the fruiting part will not move outward. Grafting time Nectarines can be bud grafted after the temperature rises, until the summer solstice. Grafting site Generally, each nectarine plant has a main trunk with 4 to 5 main branches. When budding, a new bud is grafted on the main trunk and each main branch.

Nectarine grafting techniques

The grafting position of the new bud on the main branch should be 10 cm away from the main trunk to ensure that the new bud will grow about 3 fruiting branches without touching the greenhouse film after the new bud is pulled out, preventing the fruiting position from moving outward. Grafting technology When the rootstock and scion are not separated from the skin, the bud grafting with xylem should be adopted; when the rootstock and scion are separated from the skin, the bud grafting with xylem should not be carried out, but the "D" bud grafting without xylem should be adopted. The survival rate of these two bud grafting methods is generally above 98%. If the grafting does not survive once, it can be supplemented. Cutting the rootstock and pinching the heart After the fruit is ripe and picked, cut the rootstock in time, that is, cut the main trunk and main branches 1.5 to 2 cm above the scion and bud to promote the germination of new shoots. When the new shoot grows to 10 to 15 cm, pinch the heart in time to promote the growth of side branches. After each new shoot is pinched, 3 to 4 side branches (fruiting branches) can grow. A peach tree can grow 15 to 20 fruiting branches, which are enough for fruiting.

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