Thus, the blades are vulnerable to assault or premature loss of diseases and pests, not only affects the fruit quality and nutrient accumulation of trees this year, can also lead to sprout next year not neat, flower bud differentiation, the longer it will let the grapes to years of inferiority is a vicious cycle of low productivity.
The important role of grape leaves
Nutrient supply
Leaf photosynthesis is grapes, manufacture food major organs, for the fruit expands, colored, tree growth itself, lignification branches, flower bud differentiation and other nutrients supply.
The tree potential regulation
Through leaves (tip) moderate tree potential, adjusting allocation between the nutrients in fruits and leaves;Leaf transpiration, can offer from the outside world for root absorption of water and mineral nutrition, reduce dehiscent fruit.
To improve the microclimate environment
Proper screen layer, can effectively relieve the sun point-blank, reduce the temperature field, create the comfortable field microclimate environment, reduce, burning, gas burning and so on.
Reflect the tree potential
Blade can objectively reflect the big of the grapes of various mineral elements, in order to help correct.Leaves thick, heavy means tree potential is good, the disease-resistant ability to art.
The dangers of grape stage, ignore to protect leaves
Lower the quality of the grapes
Grapes late if mismanagement, such as violation of diseases and pests, nutrition supply, excessive drought, root damage will make leaf falls off premature aging, light effects of grape sugar accumulation and the formation of grape flavor, or lead to bad fruit expands slowly, shaded, dehiscent fruit and multiple water jar.
Increase the occurrence of other diseases and insect pests
Grape leaf falls off too early, will cause the vine and weak, for disease resistance is reduced, easy to turn fruit diseases such as canker, anthrax, such as a serious, difficult to control;Some weak parasitic disease in industries such as leaf spot, root cancer also;Large deciduous also can cause serious increase soil bacteria base.
Affect the flower bud differentiation and lignification branches in the following year
Grapes are growth results for flower bud differentiation of fruit trees, although inflorescence primordium differentiation after the hardcore period no longer, but the rest of the time is a process of nutrient accumulation, if the grape leaves fall off in advance, can lead to nutrient accumulation is insufficient, the next year's germination, floral organ differentiation stage will be affected.
Grapes harvested after nutrient flow, if the blade is damaged or serious diseases, such as downy mildew can affect the process, cause the branches of the low degree of lignification, late frost damage.
How to protect the leaf?
The maintenance of root
As the saying goes "root on leaves, leaf on root length", closely related to fruit tree roots and leaf, many leaves on the problem can be found on the root source, so should strengthen the maintenance of root system.
Such as in a timely manner after the rain drainage, scarification, keep the soil permeability, keep root respiration unobstructed;High temperature and drought, timely irrigation, keep soil moisture, improve root activity;Soil acidification, harden, dysbacteriosis drench ShiHai elves creature stimulants (root type) to improve soil physical and chemical properties, both have the effect of root and root.
Strengthen nutrition
Grape maturity: is the key to increase sugar coloring period, must attach great importance to water management.Should give priority to with phosphate, potash fertilizer, less or no nitrogen, cooperate with trace element fertilizer, at the same time interval for calcium fertilizer.Mature period, it is recommended that every 7 to 10 days spraying on the leaf a phosphorus potassium source-sink 500 ~ 800 times liquid, in order to increase the fruit sugar, coloring and old branches.
Picking stages: early emphasizes phosphate supplementation, but in most cases growers in potash is given priority to, the amount of solid phosphate under insufficient, should focus on the nitrogen and phosphorus and organic fertilizer of into, to restore the tree potential, promote the mature branches are very favorable.Foliar spray ShiHai elves biological stimulants (leaf type) 800 times liquid, and the prevention and treatment of grape leaves premature aging.
Protect the blade
Avoid high temperature irrigate fields produced by the burning gas, burn leaves, or hot weather ground broadcasting diammonium, the sun is basked can produce ammonia after watering, cause blade air pollution.
The growth of grapes mature to harvest after many will still occur in the process of plant diseases and insect pests, causing premature blade loss.Such as downy mildew, black blain, leaf spot, two star leafhoppers, blind green bugs, etc., to increase prevention and control work.
