Cotton mulch film covering cultivation technology is a new cultivation technology that regulates and improves the soil environment, promotes cotton growth and development, and improves yield and quality.
Choose the appropriate mulching method to choose different coverage methods according to different climatic conditions in different regions. High-lying, dry and less rainy areas can be covered with flat and double lines covering peace and one-way coverage; in rainy and low-lying areas, high-twist double-line coverage should be adopted.
To improve the quality of plastic film covering the use of qualified PVC film, the field of plastic film coverage to 60-70% is appropriate; plastic film covering must master the principle of paving, tightening, close to the ground, buried strict, compaction, double-row coverage In the middle of the mulching film, one to two meters of buried film is buried once every once in a while to prevent the strong wind from uncovering the film; after the film is covered, the groove under the film must pay attention to leaving a gap of 3 to 4 centimeters to prevent the high-temperature hot seedlings and bending cotton. seedling.
To strengthen the management of mulch cotton in the field. When the cotton seedlings reach 7-80% seedlings, the seedlings should be planted in a timely manner and at different times. According to the principle of letting green (miao) not put yellow (miao), enlarge (miao) do not put small (miao), in the release time to master cloudy all-day release, sunny early and late release, avoid noon release (miao) The strong winds stopped the release of temperature (miao), especially in late April and early May.
According to the soil moisture under the membrane timely plug hole. In arid and semi-arid plots, holes should be placed along with holes to protect the soil; the humidity of the soil under the membrane should be delayed, and the time for plugging and opening the seedling holes should be appropriately delayed in order to facilitate the spread of seedling disease.
Cotton fields with different fertilizer and water conditions should have different film removal times. Cotton fields with good water conservancy conditions are uncovered at cotton buds; cotton fields with general water conservancy conditions can be uncovered at the early flowering stage; cotton fields with poor water conservancy conditions can be uncovered at the beginning of flowering; and water-free conditions can be achieved. Saline-alkali cotton fields can be removed. However, it should be noted that when cotton enters the flowering stage, all cotton must be removed to prevent normal cotton growth. When the film was uncovered, the weather was dry and the soil moisture was poor. It was necessary to uncover the film in combination with watering, so as to uncover the film, top-dressing, watering, and loose soil.
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