The fruit is in the expansion period

In August, the growth of the apple tree stopped growing, and the whole plant entered the fruit's rapid expansion period. To ensure high yield and high quality, it was necessary to add nutrients to the tree in time. At this time, the fruit grower should be supplemented with potassium fertilizer, supplemented by phosphate fertilizer, and appropriate amount of nitrogen fertilizer should be added according to the tree growth status and previous fertilization. Because autumn trees are prone to lack of calcium, magnesium, and iron, they can be supplemented by foliar spraying.

Large amount of fertilizer application

Potassium-based fertilizers are mainly supplemented with phosphate fertilizers, and appropriate nitrogen fertilizers are added according to the growing conditions of the trees. The long shoots are thick and thick, and the thick, dark green and glossy trees grow robustly. Each plant has 1 to 1.25 kg of potassium sulfate and 0.5 to 0.75 kg of diammonium phosphate. The long shoots are short, the shoots are short and weak, and the leaves are colored. Yellow-green, fruit trees that are smaller than the same period, with 1 to 1.25 kg of potassium per sulfate, 0.5 to 0.75 kg of diammonium phosphate, and 0.15 to 0.25 kg of urea.

Application of trace elements in fertilizers

In the rainy season, calcium fertilizer is drained in time, nitrogen fertilizer is applied in a timely manner, and the absorption of calcium by plants is promoted. Appropriate application of lime in acidic soil orchards can neutralize soil acidity, increase the amount of displaceable calcium in the soil and reduce calcium deficiency.

The iron fertilizer is applied with 200 times dilution of iron ferrous fulvic acid, or iron leaf fertilizer with amino acid, or 0.2% ferrous sulfate, iron citrate + 0.1% urea, or organic chelated iron liquid.

Magnesium-deficient Mg-deficient fruit trees can be sprayed with 1%-2% magnesium sulfate solution on the leaves 1 or 2 times; magnesium-heavy fruit trees, mixed with magnesium sulfate in organic fertilizers, magnesium sulfate per acre 1~ 1.5 kilograms.

Fertilization method

Round-groove fertilization method This method is suitable for sapling basal fertilization. Dig a circular groove with a width of 30 to 40 cm and a depth of 15 to 25 cm around the crown, and then mix topsoil with chemical fertilizer.

Strip groove fertilization in the fruit trees or between plants, dig 1 to 2 width 50 cm, depth 15 to 25 cm long groove, and then fertilization cover.

The radiation trench fertilization method digs 6 to 8 radial grooves at a distance of 1 meter from the trunk. The groove width is 30 to 60 centimeters and the depth is 15 to 25 centimeters. The length reaches the outer edge of the trunk, and the fertilizer is applied to the trenches to cover the soil.

B, Pear: fertile soil + strong tree + rooting, "trinity" yield

The fertile soil is a basic pristine pear garden. At this time, it coincides with the season of rain and heat. The vegetation is flourishing. The grass that grows at a height of 30 to 40 centimeters must be castrated in time, and the height of the cut is 10 to 20 centimeters. It is advisable to keep dwarf pods in rain-rich areas and sorghum in arid regions. For pear orchards with vigorous microbial activity in the soil, organic stalks, weeds, and other organic materials can be covered in tree trays. The thickness of the cover should be 15 cm. Do not cover within 20~30cm around the neck, so as not to accumulate phlegm and lead to rot of the neck; for pear orchards planting green manure crops such as sesbania, mahogany, and alfalfa, they can be turned in place and the depth of pressure is 10 For ~15 cm, ditches can also be used to dig fertilisers in the rows and the cast green manures can be pressed into the fertiliser ditch.

Strong tree is the key. August is the critical period for the growth of fresh shoots and fruit enlargement of pear trees. At this time, it is necessary to control the application of nitrogen fertilizer and increase the application of phosphorus and potassium fertilizers. Fertilizer 10 kg, can also be sprayed with leaves, can be sprayed with 0.3% ~ 0.5% urea, 0.3% ~ 0.5% of potassium dihydrogen phosphate; for the lack of disease of fruit trees, spray 0.1% ~ 0.3% borax, as appropriate, 0.5% of zinc sulfate and 0.3% to 0.5% of ferrous sulfate are used to meet the long-term growth requirement of the pear tree.

Rooting is the basic pear tree is a physiologically drought-tolerant tree species, the greater the demand for water, this time is the critical period of pear water requirement, root (especially the shallow root) vulnerable to high temperature and drought. Therefore, it is necessary to timely and adequate irrigation to ensure the normal growth of the tree and the rapid expansion of the fruit.

C. Citrus: A reasonable mix of nitrogen + phosphorus + potassium to ensure nutrient and growth balance

The fertilization needs reasonable trees, fruit, and nutrients that cannot keep up with the trees. It is necessary to apply more vigorous fruit fertilizers. The N, P, and K fertilizers should be properly matched to fully meet the needs of nutrients for fruit enlargement and growth and development of new shoots; Year tree, appropriate less fertilization, especially to control the amount of nitrogen fertilizer to prevent leggy, improve quality. Adhere to the combination of surface fertilization and foliar fertilizer application. In the late stage of fruit enlargement, spray 0.2%～0.3% potassium dihydrogen phosphate or compound fertilizer, or 20% turfgrass leachate and 1% superphosphate leachate, or 0.03%～0.05% Rare Earth Nitrate.

Drought prevention is a key conditional orangery. It should be timely irrigated. The mountainous orange groves should be fully covered with grass to moisturize and prevent drought, and strengthen the cultivating soil to protect soil, prevent soil compaction, reduce water evaporation, apply water and drought protection agents, foliar spray. Aspirin and other anti-evaporation agents reduce the evaporation loss of water in the soil and the tree. In the dry weather, the leaves are sprayed with water to increase the air humidity, and the water, fertilizer, gas, and heat are coordinated to prevent drought and high temperatures. However, irrigation should be stopped 20 days before fruit harvesting to reduce cell water content, increase solids content, promote early maturation, and enhance storage stability.

The quality guarantees fruit quality through the late expansion of fruits, and can be used to improve the fruit quality through foliar spray fertilizer, such as 0.2% to 0.3% Baume degree lime sulfur, or 0.03% to 0.05% rare earth liquid, or 300 to 500 times rice vinegar, etc. Fall shoots grow long, reduce nutrient depletion, increase nutrient accumulation, promote fruit enlargement, and increase sugar content.

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