The mulch clings to the stem base
Dead tree serious
The sweet pepper planted by the vegetable farmer of Xinglong Township in Sheqi County had a large dead tree phenomenon. The base of the stem rotted dark brown and was immersed in water. After careful inspection and inquiries, when Master Li covers the film, the film and the stem stick together. When the temperature is high, the moisture evaporating from the soil condenses into water droplets on the film and flows down the base of the stem. On the base of the stem, a high-temperature and high-humidity environment was formed, resulting in serious occurrence of sweet pepper diseases.
Remind vegetable farmers, remember not to stick to the base of vegetable stems when the plastic film is covered, try not to cut the plastic film with a blade, but use a finger to dip the plastic film to ensure that the mouth is large and will not be bridged. The general diameter of 5 to 8 cm is appropriate. During the high temperature stage, the mulch film is rolled up on both sides to prevent the ground temperature from becoming too high. When the temperature drops, the mulch film is opened and the adjacent two mulch films are clamped with a grafting clip so that the mulch does not contact the culm.
Full shed cover
Affects root growth
The spring cultivars planted by Yuan Shi in the town of Houji Town, Zhenping County, grow weakly this year, with fine stalks, yellow leaves, and severe flowering and fruit drop. Through field interviews, technicians discovered that the mulch covered by Yuan’s master was close to the ground, affecting the gas exchange between soil and air. Especially after watering, the soil had poor air permeability, resulting in impeded root respiration, poor root growth, and absorption of nutrients. With the ability to weaken, the growth of tomatoes is naturally weak.
In this proposal, the plantation line is best to use steel wire or bamboo rafts to support the mulch, every 50 centimeters, from the south to the north to cover the mulch on the mulch, which can achieve watering under the membrane, which not only improves the permeability of the soil, It also makes it difficult to volatilize moisture, reducing the humidity inside the greenhouse; while the operation line is best to cover the crop stalks, which not only raises the ground temperature, but also regulates the humidity in the greenhouse.
Autumn mulch mulching is not conducive to deep roots
In winter, with the decrease of the temperature, growers who plant cucumbers usually use the "drilling method" to tighten the cover film. According to practical suggestions, in greenhouse vegetable cultivation, the time for covering plastic film should be determined according to the specific climatic conditions. Such as autumnal cucumber after planting, the outside temperature is higher, if immediately covered with plastic film, on the one hand due to high temperature plastic film, prone to suffocate root; on the other hand, after covering the film, in the surface layer to form a moist environment, is not conducive to the root system Barrel growth may result in failure of seedlings, making it difficult to grow strong seedlings. Therefore, it is recommended to cover the mulch after 15 days of planting depending on the weather conditions, which will help seedling roots to shoot down and cultivate strong trees.
Membrane only covering the operating line
Equivalent to no cover film
At the time of my visit, I also discovered that many vegetable farmers only covered the operation of the shed in order to reduce costs, but the planting line did not cover the mulching film. However, such an approach not only did not exert the advantages of mulch film coverage, but also highlighted the disadvantages and the effect was poor. In greenhouse vegetable production, the most important role of mulching is to reduce the humidity in the shed and reduce the occurrence of diseases. The practice of covering the ground film and planting rows to cover the floor is not conducive to reducing the humidity in the greenhouse, because when the vegetables are watered, most of the time, they are planted in rows. The cultivation of rows of plants without covering the plastic film will reduce the humidity of the air. To how much effect, it can not play the effect of insulation. But in the operation of the cover film, the disadvantages are also obvious, making the operation of the soil permeability greatly reduced, affecting the root growth and development.
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