Can you use urea after planting cone chestnut for half a month?

Usage and dosage of urea from cone chestnut.

In the process of planting chestnut trees, the best fertilizer to use is organic fertilizer, such as well-rotted animal manure or human manure. However, the growth of chestnut still needs to solve the comprehensive structure of fertilizer, and inorganic fertilizers should be applied, such as: potassium dihydrogen phosphate, superphosphate, borax, zinc sulfate, urea, diamine phosphate and so on.

1. Fertilization in autumn.

Fertilization in autumn and winter, mainly in October, is mainly used in the way of root fertilization, fertilization to a single plant, one by one fertilization, that is, ditching or digging pit fertilization. Fertilization to rotten animal manure: urea + diamine phosphate + borax =:

1。Buried deep underground, that is, the fertilization process is completed.

2. The best foliar fertilizer ratio.

Chestnut tree in flowering, fruit set, fruit expansion, fruit picking, to use urea, at this time urea is mainly used as a form of foliar fertilizer, that is, in each spray a foliar fertilizer, the main fertilizer is urea, for example: after years of experiments by fruit farmers and fruit tree technicians, if you want to bloom more, fall less flowers, set more fruits, drop less fruits, chestnut harvest, increase yield, the best foliar fertilizer with potassium dihydrogen phosphate + urea has the best effect.

Reasonable fertilization and scientific management can achieve the purpose of high yield and high quality. Weeding should be done before fertilization, and the use of herbicides is strictly prohibited. Organic fertilizer should be applied, organic fertilizer includes human and livestock manure, cake fertilizer, compost made of plant leaves and stems, green manure, etc., organic fertilizer effect is slow, fertilizer effect is long, nutrition is comprehensive, can improve soil structure, increase water and fertilizer retention capacity.

Organic fertilizer is mainly used as base fertilizer, and can also be used as top dressing after full decomposition. Attention should be paid to the protection of chestnut roots, digging ditches and fertilizing to avoid hurting the big roots and taproots, many chestnut farmers fertilization parts are too close to the trunk, not only hurt the big roots, but also cause the waste of fertilizer. Cone chestnut trees whose root systems have been damaged should be repaired.

It is necessary to look for the capillary roots of the root system for fertilization, and avoid digging large trenches and deep trenches for fertilization. In the mountainous area of yellow mud*, due to the slow dehydration, digging a large ditch and fertilizing is easy to rot the roots, resulting in the tilt of the tree. Where conditions permit, the test * formula fertilization can be promoted.

Introduction to Cone Chestnut Shellaceae. Deciduous tree, up to 30 m tall and up to 1 m DBH. Leaves alternate, ovate-lanceolate, 8-17 cm long, 2-5 cm wide, apex long and acuminate, base rounded, leaf margins serrated with acuminate.

The male inflorescence bears the lower leaf axils of the twigs, and the female inflorescences have the upper leaf axils of the twigs. shell bucket spherical, barbed in centimeters in diameter; Nuts are solitary in shell buckets and are oval. The seeds contain starch and are starchy plants.

Wild in the southeast foot of the Wuyi Mountains, the hometown of China's cone chestnut, Jian'ou City and Zhenghe County. The famous tribute Min hazel in history is produced here, according to the "Compendium of Materia Medica" records: chestnut, kidney fruit also, chestnut can pass the kidney, benefit the temperature of the stomach, long-term food will be strong.

1. Soil and fertilizer management: expand the hole in time, carry out comprehensive reclamation and deep ploughing of the chestnut orchard with a slope below 15 degrees in late autumn and early winter, and need to hoe shallow once a year in spring and autumn. Apply sufficient basal fertilizer in late autumn and early winter, and top dressing should be done once in spring and summer.

2. After the cone chestnut is planted, especially after 5 years to enter the peak production period, it is generally required to fertilize 2 3 times a year. The first time is after the fruit is harvested, combined with the soil management to adopt the method of ditch application above the tree body, that is, digging a semicircular ditch with a width of 30 40cm and a depth of 40cm along the top of the canopy, applying 50kg of soil miscellaneous fertilizer, 2kg of phosphate fertilizer or 1 2kg of compound fertilizer, and mixing 50g of carbofuran, and covering the soil after application. This time the fertilizer must be applied enough to promote the recovery of the tree and the differentiation of flower buds.

The second fertilization was in the summer of the following year, 7 8 August, and the general plant applied 1 2kg of compound fertilizer and 1 2kg of phosphate fertilizer, which was in the rapid growth period of chestnut fruit, and sufficient nutrients were conducive to fruit enlargement and prevent fruit dropping. When conditions permit, nitrogen fertilizer can be applied once before flowering in April and May to promote flowering and fruiting. Cone chestnut needs water during the whole growth period, but the water requirement is more in the growth period and the rapid expansion of the fruit in the new shoot acceleration period, and the lack of water at this time affects the growth of the new shoot and the rapid increase of the fruit, which not only makes the fruit smaller, but also reduces the content of sugar and starch, and affects the yield and quality.

The water management of chestnut orchard is generally combined with irrigation after each fertilization, which not only meets the production needs of chestnut trees, but also promotes the dissolution and infiltration of fertilizer, which is conducive to the absorption of chestnut trees.