Creson, also known as cronson, is the united states of america's very old, red, nuclear-free grape species. Because of natural non-nucleusity, a durable storage of hardness, red colours, sweet mouths and popular consumers, the chrysanthemum problem afflicts many farmers. How can the problems of colouring, lack of sweetness and soft fruit be dealt with effectively。
Creson is a more difficult species to compare. The areas where the light is not good, the temperature is not very different and the soil sheeting is not allowed to grow creson. The preponderant areas of kryson cultivation are mainly the north-west, such as gansu, xinjiang, shanxi and xichang, where the soil is better and the light is abundant. The soil must not pick adhesive land and feed organic fertilizer when planting。
I. Cryson's costs
Soft fruit is usually associated with damage to the root system, which leads to inadequate nutrients in the tree, thereby selectively softening some grapes in order to concentrate more nutrients on other fruits. The damage to the roots may be caused by:
1. Flooding: water-bearing soil is not well ventilated and causes damage to root systems. During the rainy season, it is necessary to keep the roots as low as possible so that the roots are not damaged and water is not hoarded in the water when feeding。
2 fertilisation: including inundation caused by the use of water soluble fertilizers, as well as severe damage to leaves and eutrophication. Scientific fertilization is required to protect the leaves。
3. Overproduction: no flowers, no fruit. It's too big, it's lower, it's not enough to produce enough nutrients, and it leads to a change in the coloring of the fruit, a decrease in the sugar content of the fruit, a softening of the acid meat cell, and, when it's heavy, it causes a grape can。
Thus, the key to solving the problem of soft fruit lies in rooting and protecting the leaves. In addition, the high yield of fruit trees and the excessive size of fruit grains also consume the nutrients of tree bodies, leading to later chromosomal difficulties and soft fruit, and affecting the quality of flower buds in the second year. It is generally recommended that kryson grapes produce about 4,000 pounds。
Ii. The problem of cryson
(1) creson grapes are in themselves a relatively difficult type of top colour, with the following colour conditions:
The maturity of the fruit: the raisins grow softer and white。
Root energy: root growth is facilitated by the application of roots to microbes and algae。
• quality of leaves: leave new leaves in the radial zone, produce nutrients and promote upward colour。
The maturity of the branch: promotes the maturity of the branch, which is less likely to fade when the grape is coloured. Potassium phosphate drops into the upper colour when it becomes soft contribute to the maturity of the branches。
(2) for creson grapes, the colour can be promoted by the following regulatory measures:
Control of bystands: control of all bystand growth, concentration of nutrition on grapes and promotion of colour。
Improve ventilation: improve ventilation, control the occurrence of diseases, especially frost, and ensure green grapes。
Remove the old leaves: remove the old leaves from the ears, cut off the extra new or sidekicks, and let the grapes shine through the wind, and make the colour。
Reasonable application of fertilizers: a ban during the chromosomal period would facilitate the absorption of methoxypropylate by nitrogen and the careful use of emulsion and powder-type pesticides to prevent the production of fruit powder and even contamination of fruit surfaces. Nor should potassium nitrate be overapplied, otherwise nitrogen will be stored in plants, with serious effects on the transformation of grapes. In addition, dark-coloured fertilizers, such as sea-algae fertilizers and manures such as corrosive acids, have the potential to pollute the face of the fruit within 20 days of harvest and require attention。
Packing time: packing in due course has a significant impact on the appearance and internal quality of kryson's grapes. For example, the best time for the collection of bags of kryson grapes in the water catchment area was on 20 september, and premature removal of bags could lead to overweight or even darkening, while late removal of bags could lead to light colour and mixed green particles。
Pharmacological aid: when grapes begin to colour, they are generally promoted by nutrients and by trace elements of potassium radon. The use of ethylene-containing agents may be reduced by adding potassium dihydrogen and organic fluids for use, reducing side effects on grapes, such as droplets, soft fruit, etc. Preserve formulations such as "protective + pigmentant" can also be used, such as ethylene ester, choline chloride + ethylene, thiobutyric acid + decomposition acid (trigger). When vinyl is used, the low concentration of the whole spray is better than the high concentration of the photonozzle; when the acid is detached, the scavenger is better than the spray. However, care must be taken about the concentration and amount of use, which could otherwise lead to leaf burning. After the first seven days of use, if it is not working well, it can be used again, but at an interval of seven days, too frequent use can cause fast foliage。
In addition to the management measures described above, soil and light, etc., also have a significant impact on the color of kryson grapes. Soils that grow creson grapes should choose sandy land, require high organic content and ablaze, do not select adhesive land and avoid soil sheeting. There is also a need for sufficient light during the period of the crayson grape colour, especially during the month of the upper colour, which must be guaranteed。
