Grapes are very popular fruits in the market. It is not only rich in varieties, but also has high nutritional value. It tastes sweet and juicy, and many people like it. Driven by the overall demand, the grape planting area in China is getting wider and wider. However, due to the influence of natural environment on grape planting, greenhouse grape planting technology has been gradually popularized and applied, which can be planted and picked all year round, effectively prolonging the planting income. So what technical points should be paid attention to in greenhouse grape planting? Let's find out.

Material selection and shed structure

The Yangtze River Basin is a plastic shed arched from north to south. Bamboo, cement prefabricated parts and steel pipes can be used as the skeleton. The temperature in the north is relatively low, and the east-west micro-arc solar greenhouse is mostly used, with a back wall in the north. The columns are reinforced concrete columns, and the frame material is bamboo. The shed film adopts PVC drip-free film, which has long service life, aging resistance and good light transmission and heat preservation performance.

Precautions for planting

Before planting, select suitable local varieties, then ditch, apply 5000kg/667m2 decomposed organic fertilizer, and use 2% calcium superphosphate or calcium magnesium phosphate as base fertilizer. 165438+1plant the annual seedlings in late October. Leave 2-3 buds from the base and cut off the stems above. The plant spacing in the south and north directions is 1m and 2m respectively, and the planting area is * * * 146 plants /667m2.

Irrigation fertilization

The whole garden is enclosed with film. After 95% of the flowers in the garden wither, take off the plastic film and water the flowers for the first time. After 20 days, water the flowers for the second time before the berries become soft.

Ternary compound fertilizer is usually topdressing once in bud stage, and the topdressing ratio is 666.7m2/250kg, and urea and diammonium phosphate are 50kg each. Foliar fertilizer should be supplemented 2-3 times before flowering, combined with watering after flowering, and topdressing urea 666.7m2/250kg. In late April, when the berries began to soften, potassium sulfate 1 time was applied topdressing, and the dosage was 666.7m2/250kg. At the same time, foliar fertilization is continuously carried out for 2-3 times.

decrease

In a good growing environment, it is beneficial to establish a reasonable hedge frame by using the spatial structure of the hedge to guide the vines to grow around the frame. If you want to thicken the branches, you can also support them. In addition, pay attention to pruning. In winter, the main branches of grapes are curled on the grape rack, and it is best to leave 4-5 branches within each main branch 1 meter. If you want to shorten the dormancy period of grapes, you can spray or brush 20% lime nitrogen on the plants while pruning, which can make grapes germinate 7 days in advance, commonly known as "breaking dormancy".

Eliminate pests and diseases

The growth environment of greenhouse grapes is special, and the pests and diseases are generally light. The main control targets are young axis rot, white rot, brown spot and so on. According to the site management, spray 3-5be stone sulfur mixture before the flower bud, spray methyl nipagin twice before the flower bud, and use Bordeaux mixture and ethyl aluminum phosphate alternately.

Of course, there are still many planting points to pay attention to, such as pruning, uncovering, ventilation, lighting, temperature control and so on. Of course, to achieve high yield of greenhouse grapes, these points must be put in place.