Do you know that the size of grapes in planting affects the yield, causes and control measures?

Every year, August and September is the time when grapes are on the market, and it is also the happiest time for fruit growers, but there are some problems in the planting process, in which the size of grains seriously affects the yield. if you want to solve the problem, you have to understand the causes and control measures of grape size.

I. the basic situation of grapes

1. The main producing areas of grapes

Grape is one of the oldest tree species, which is cultivated all over the world. It is also known as Putao, grass dragon bead, purple cherry, Bodhi seed, mountain gourd and so on. Most of the grape production is mainly concentrated in the Northern Hemisphere. The main producing areas in China include Xiao County in Anhui, Turpan and Hotan in Xinjiang, Yantai in Shandong, Zhangjiakou, Xuanhua and Changli in Hebei, Dalian, Xiongyue and Shenyang in Liaoning and Lumiao Township, Civil Rights and Yifeng in Henan Province.

two。 The yield of grapes per mu

Generally, the yield of well-managed high-yield vineyards can reach 3000-4000 jin per mu, even more than 4000 jin, and some people in Shangqiu area have a yield of about 8000 jin per mu; the average yield of vineyards is 2000-3000 jin, while that of low-yield gardens ranges from 1000 to 2000 jin. However, in order to obtain high yield, varieties, fertilization, pest control, management and so on are indispensable.

3. Grape variety

There are more than 8000 common cultivated varieties in the world, including fresh food, wine, dried or other processed varieties. Fresh food varieties include Sabah Pearl, Vineyard Queen, Jingzaojing, Campbell Zaosheng, Seedless White, Rose, Jufeng, etc.; wine brewers are Baiya, Bessie, Timiat, Riesling, Yeslin, Coral Sauvignon, Cabernet Sauvignon and so on.

Second, the causes of grape size and control measures

The occurrence of grape size is a problem that seriously affects the yield and quality, and the benefit will also be affected, so the following reasons and control measures will be sorted out as follows for your reference.

1. The reason of the grape variety itself

Some varieties are born with poor pollination, such as Jufeng, Victoria, Jingya and so on. To solve this problem, one is to change varieties, artificial pollination or denuclearization.

two。 Grapes lack zinc and boron.

Grape lack of boron makes it difficult to prolong pollen tube, ovule difficult to fertilize, unable to form seeds, while zinc deficiency leads to insufficient auxin synthesis, slow growth, less fruit setting, and flower cap is not easy to fall off, which will lead to large and small grains. If you want to solve the problem, you can add 1500 times of boron protection solution and foliar spraying zinc fertilizer such as zinc, calcium and amino acids after fruit harvest.

3. Adverse weather effects of grape flowering period

In the grape flowering stage, continuous low temperature, overcast and rain or high temperature and drought will cause grain size. The former can not be changed in the open field, but only the grape cultivation in the greenhouse can be changed by adjusting the temperature in the greenhouse, while the latter can be alleviated by watering. Or implement seedless cultivation.

In addition, improper application of hormones, weak growth, high yield and diseases and insect pests are all the reasons for grape size, so we should take different measures according to different conditions.