At present, more herbicides used in orchards are glyphosate. These two agents will not contaminate the soil, and will not harm the intercropped crops in the orchard after application, nor will it affect the roots of the fruit trees. These two agents can be used to weed the orchard.
1. Before the planting of the fruit trees in the orchard before weeding, the weeds planned to be used as orchards may be more. If artificial weeding is often time-consuming, it is easy to relapse after being pressed into the soil, and the herbicide can be applied. It is mainly composed of 1 year old and 2 year old weeds. The acre can be evenly sprayed with 20% gram of water tracer 250-300 ml and 50 kg of water. After weeding, weeds die faster and more thoroughly; for example, perennial weeds Mainly, glyphosate should be applied, using 10% glyphosate 1500 ml per acre with 50 kg of water, and 1% washing powder should be added to the liquid to uniformly spray the weeds. Plant the fruit trees after weeding.
2. For crops between orchards for weeding and weeding, such as watermelon , peanuts, soybeans and other crops after harvesting, before planting or transplanting plants such as garden flowers and cabbage, 20% gram of trace water can be used per acre. 250 ml of water and 50 kg of water are sprayed on the weeds. After 5-7 days of application, the weeds die, and the crops can be ploughed and planted. Glyphosate can also be applied if the crop season is not tight. Each acre is sprayed with 10% glyphosate 1000-1500 ml and 50 kg water. Weeds die 10-15 days after application, and the soil can be ploughed and then planted. When spraying herbicides, prevent the liquid from coming into contact with fruit leaves and crops outside the orchard.
3, the orchard chooses weeding mountain orchard, the terrain is higher, the slope is larger, especially the soil and the weeding of the ladder wall, for the loss of waterproof soil, can be applied to the weeding. Gram-trap is a contact-type herbicide. It kills stems and leaves for perennial weeds, does not affect the root system, and is equivalent to the action of cutting grass. Later, grasshoppers can germinate and will not cause soil erosion during rainfall. . For weeding in flatland orchards, weeding should be applied to remove roots. Glyphosate can be applied. Generally, it is sprayed with 10% glyphosate 1500 ml or 41% Roundup 300-400 ml per mu. For some intractable weeds, 1% washing powder and 15% metformin can be added to the glyphosate solution. Should pay attention to the safety of citrus leaves.
Paper dyeing process, the object is to dye the role of paper fibers. Mechanism of different Dyes with different pulp, wood is known as basic dyes great affinity, suitable for dyeing pulp lignin content; pulp surface with a strong negative charge, then the Direct Dyes hardly adsorbed ions , with it to reduce the surface charge, the dye near the fiber surface is fixed. Such non-electrostatic adsorption caused, bauxite is commonly used in papermaking dye retention agent, because the majority of paper dyes are anionic, cationic aluminum compound and anionic dye-forming cation may be precipitated and adsorbed on the fiber surface which is to retain this mechanism occurs at pH 4.0-5.2, then the charge density of the aluminum ions is high, the charge is stronger.
Dyes commonly used in the paper coating colored paper, the dye and the paper fibers by covalent bond, ionic bond between, with the key, and molecular hydrogen binding forces, which depends on the color fastness of adhesion strength, exactly in what based combination, depending on the structure of the dye molecule.
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Paper Dyes, Paper Dyes Applications, Paper Dyes Industries
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