Vegetable planting technology: the use of shade nets should be moderate

In recent days, high temperatures and rainy weather have alternated, and the temperature is unpredictable. Although the fall is coming, the hot weather is still there, so many farmers use sun visors. Although it is necessary to avoid high temperatures, excessive sunshading will also affect the growth of vegetables, so our shade nets should be moderately used.

The reporter was informed that under the conditions of a cloudy day, many vegetable farmers did not remove the Shade Net in time, resulting in insufficient synthesis of organic nutrients in vegetables, and many cases of fruit and fruit coking and fruit malformation. Although some farmers blame these problems on high temperatures, under the conditions of shade net coverage, more is caused by insufficient light.

Compared with other shading measures, the sunshade is more flexible, and can be pulled and stowed according to the different light intensity of the shade. The reality is that a large number of vegetable farmers no longer or rarely adopt a flexible covering method after covering the Sunshade Net, and generally no longer move after covering.

Taking tomatoes as an example, the light compensation point is 3-3.5 million lux. If a shading net with a shading rate of 70% is used, the light intensity in the shed is 2.7-30,000 when the light intensity is 9-10 million lux at noon. Lux, the light intensity in the shed is under the light compensation point of the tomato. The tomato is in a state of light hunger for a long time, and the lack of organic nutrients for the flower and fruit naturally leads to the cultivation of flowers and the inability to sit on the fruit. On a sunny day, cloudy days are more serious.

After entering the autumn, the high temperature time becomes shorter, and there will be more rainy weather, and most of the vegetables enter the flowering and fruiting period. In order to ensure the good differentiation of the flower buds and the growth of the fruit, it is necessary to ensure that there are enough photosynthesis products, and the illuminance can be satisfied. Ensure the accumulation of photosynthetic products. The specific practices are as follows:

1. The area of shading net shading should be appropriately reduced. If the coverage area is reduced, a part of the upper and lower sides are recovered;

2. The sunshade net can be covered during the period from 11 am to 3 pm on a sunny day, and it is not covered on a cloudy day.

After reading the article, we will know that the shade net can not be overused, I hope to solve your problem, more agricultural technology knowledge welcomes the Hui Nong School!