Its main advantages are: ① it is suitable for the growth needs of most varieties and is conducive to early high yield. 2 branches and vines are only 5-6 meters long, easy to go up and down, and easy to operate. ② The main vine is short, easy to adjust the tree potential, and the yield is high and stable. At the same time, it can recover quickly after updating and has little influence on the yield. ④ It is easy to choose frame materials.
It should be noted that:
1. Newly planted vines are fertilized before new roots grow, or the base fertilizer is applied too shallowly, resulting in dead seedlings.
2. After germination, the leaves turn yellow, and a lot of fertilization and watering are carried out. It will lead to lower soil temperature, worse root absorption capacity, weaker root system itself, and shorter irrigation and fertilization.
3. Yellow treetops or yellow whole trees will blindly supplement iron fertilizer. The yellowing of the leaves at the top of the tree is not necessarily caused by the lack of iron in the soil, but mostly because the soil is cold and humid, the root system has poor respiration and weak absorption ability, and it is difficult to absorb iron and other elements, which leads to the yellowing of the upper part of the tree. This phenomenon mostly occurs in greenhouse grapes or orchards covered with plastic films and with excessive soil moisture. At this time, fertilization or watering will reduce the ground temperature and aggravate the symptoms of iron deficiency.
4. Fertilize more when the vines grow slowly.
Many vines are difficult to grow without new shoots, mainly because of excessive soil moisture or difficulty in soil respiration, difficulty in root respiration, low absorption capacity or few and weak roots. At this time, fertilization leads to greater soil moisture and worse air permeability. Too much fertilizer is easy to burn the roots. In this case, the first thing to be solved is soil permeability and root respiration activity, and loosening soil and drainage are effective measures.
5, fertilization is too concentrated, too close to the trunk.
The distance that fertilizer can move in the soil is limited, that is to say, when fertilization is concentrated, only some roots are absorbing nutrients. Centralized fertilization is easy to cause the local concentration of fertilizer to be too high, resulting in root burning.
Extended data:
The general definition of grape trellis (pú táo jià) is a bamboo trellis built for the smooth growth and fruiting of grape seedlings. It is divided into three forms: the row spacing of hedge frame is 3.0m× 1.5m 150 plants/mu, 2.5m×1.5m/0/77 plants/mu, and the row spacing of simple bamboo frame is 2.0m× 1.5m222 plants.
References:
Grape rack-Baidu encyclopedia