Grape planting in high temperature season should pay attention to fertilizer and water management!

Summer is an important period for vegetative growth and fruit ripening of grape trees. This stage coincides with the transformation of tree nutrition, and the branches, leaves, flowers, fruits and roots of grapes are growing rapidly, so when planting grapes, we should pay attention to fertilizer and water management in the high temperature season.

1. Management of grape fertilizer and water in high temperature season

1. Fertilizer section

(1) early flowering: applying quick-acting nitrogen fertilizer 10 days before flowering, combined with 300-fold solution of sea elf biological stimulant root application, in order to improve tree nutrition and promote grape flowering. Seven days before flowering, the foliar spray of 1000 times of boron source pool and sea elf biological stimulant could increase the fruit setting rate.

(2) flowering: spraying sea elves biological stimulant 800 times of foliar liquid + 1000 times of boron source solution after flowering and after flowering respectively to further stabilize the fruit.

(3) Fruit expansion stage: after fruit setting, the fruit expansion fertilizer was applied once, 10 jin of potassium and calcium nitrate per mu combined with 300 times of sea elf biological stimulant root application, digging a ring ditch at about 1 m from the plant to enhance nutrition and protect fruit and strong roots.

(4) Color conversion period: about 100 grams of potassium sulfate fertilizer was applied per plant, combined with sea elves biological stimulant; 800 times of phosphorus and potassium source pool solution was sprayed on the leaves every 7-10 days during grape ripening to promote fruit color conversion, prevent fruit cracking and increase fruit sugar content.

2. Water content

Irrigate once a week before flowering. It is forbidden to irrigate from flowering to fruit setting to prevent falling flowers and fruits. The fruit is generally not watered during the coloring period. After fruit harvesting, the fruit was irrigated once with base fertilizer. Water in time after fertilizing.

3. Soil

Easy to crack fruit varieties try to take measures such as film mulching and grass mulching on the ground to maintain a balanced supply of soil moisture.

Timely ploughing and weeding after irrigation or rainfall, keep the soil loose and breathable, promote microbial activity, increase the accumulation of effective nutrients, and reduce the occurrence of diseases and insect pests.

The depth of weeding in mid-tillage is about 10cm to prevent root damage.

Second, pruning grapes in high temperature season

Summer pruning of grapevines is a supplement to winter pruning, which is carried out from May to August when the growth is exuberant, and it is generally pruned 4 times and 5 times. The aim is to regulate the contradiction between growth and fruit, control apical dominance, reduce ineffective consumption, improve ventilation and light transmission environment, and promote fruit development and flower bud differentiation.

1. Erase buds

Grape sprouting in early spring has more bud eyes, and some of them send out double shoots at one node. Erasing too many buds can save tree nutrition.

When the sprouts grow 1~2cm, remove the basal buds below the ground 50cm, wipe off the weak buds, disease and insect buds, over-dense buds, etc., leave 1 bud with 2-3 buds germinating in 1 node, leave the main buds to remove secondary buds, keep healthy buds, and remove weak buds.

2. Pick the heart

Coring is usually carried out from 3 to 5 days before flowering to the beginning of flowering. It is appropriate to pick the heart at 2 or 3 tender leaves below the growing point, not too light or too heavy.

(1) vegetative branch: leave 16 leaves 20 leaves, prepare branches 9 leaves 13 leaves to pick the heart, when the growth is too prosperous, it is necessary to pick the heart many times to control its growth.

(2) fruiting branches: the morning and evening of coring depends on the tree potential, varieties and characteristics of falling flowers, generally leaving 5 leaves above the inflorescence, and varieties with heavy falling flowers and fruits earlier, generally 4-5 days before flowering, and with high intensity. Leaving 4 leaves above the inflorescence or even 1 leaf or even 2 leaves. The varieties with high fruit setting rate pick out the heart at flowering stage or after a large number of falling flowers, and the heart picking intensity is relatively light.