Fruit trees should pay attention to fertilizing in winter.

The best time for fruit trees to apply base fertilizer is autumn, but the orchards that do not apply base fertilizer in time for various reasons can apply base fertilizer in early winter. The fertilization time of fruit trees in winter should be early rather than late, preferably in the early winter season when the orchard ground is not completely frozen. The method of fertilization should be scientific and combined with winter irrigation to achieve the best effect.

Fertilization of fruit trees in winter is very important, which has a great impact on the growth of fruit trees in the coming year, and is related to the yield of fruit trees in the second year. Therefore, it is necessary to strengthen the fertilization management of fruit trees in winter.

? Choose a good fertilizer

High-quality fertilizers include mature compost, stable manure, ring manure, green manure, crop straw and human manure, chicken manure and so on. These organic fertilizers have a variety of nutrients needed by fruit trees, and continuous large amounts of application can effectively improve the orchard soil. The application amount of organic fertilizer can be 2-3 kg per kilogram of fruit, or 20-30 kg per adult fruit tree. It should be noted that organic fertilizer must be fully mature, untreated organic fertilizer directly into the soil, in the process of fermentation will produce a lot of heat and root burning phenomenon.

? Pay attention to the time of fertilization

According to the growth law of the root system of fruit trees in winter, in general, the best time to apply base fertilizer in autumn is in mid-late September, and another fertilization period is between early October and mid-November. If both times are missed, fertilizer should be applied as early as possible after the soil is thawed in the spring of the following year.

? Fertilization method

When fertilizing in winter, fertilize on the ground under the crown with the trunk as the axis, keep a distance of about 80 cm from the middle trunk, and dig 4-6 radial trenches outward, narrow on the inside, wide on the outside, shallow on the inside and deep on the outside, or dig some strip ditches under the outer edge of the crown, generally 20-40 cm deep, 40 cm wide and 80 cm long. If you encounter a thick root with a diameter of more than 1.5 cm, remember not to cut it off as much as possible. Fertilizer can not be covered immediately, the fertilizer and soil should be fully stirred evenly, and then covered, but also watered, the right amount can be.

? Supplementary application of micro-fertilizer

Fruit trees have little demand for micro-fertilizer, but it is indispensable. when the supply of some micro-fertilizer is insufficient, fruit trees are easy to suffer from physiological diseases such as element deficiency, such as yellowing disease in iron deficiency and lobular disease in zinc deficiency. For the fruit trees with perennial iron deficiency, ferrous sulfate should be supplemented in the base fertilizer, but the direct application of ferrous sulfate into the soil will quickly turn into insoluble compounds, so it is better to apply ferrous sulfate with organic fertilizer at the same time. For orchards with perennial boron deficiency and zinc deficiency, full boron fertilizer and zinc fertilizer are applied by ditch application and hole application every year, generally 50 grams of boron fertilizer and zinc fertilizer are applied to each adult tree. Zhang Hongliang