Although there are many types of tapping screws, they all have the following similarities: Round head Tapping screw,hex tapping screw,flat head tapping screw,pan head tapping screw,truss head tapping screw Shenzhen Lanejoy Technology Co.,LTD , https://www.brassinsert.net
The remedial measures that can be taken in the phytotoxicity of corn are mainly to improve the crop root environment, promote crop growth and enhance its resistance to stress. If farming measures are taken, the soil is loosened, and the ground temperature and soil aeration are increased. According to the growth of the crop, supplement some quick-acting nitrogen, phosphorus, potassium fertilizer or other micro-fertilizer. Foliar fertilization is better, and fertilizer effect is faster. It is also possible to spray some plant growth regulators that encourage and encourage growth, especially for root growth. But it must be applied according to the needs of the crop, otherwise it will be counterproductive. If there is water on the ground, it should be eliminated early; if pests and diseases occur, it should be prevented as soon as possible. In short, as long as measures are conducive to crop growth and development, it is beneficial to alleviate phytotoxicity and reduce losses.
1. For soil-treated herbicides due to the use of excessive doses, it is possible to use cultivating, continuous irrigation, drainage, repeated washing to alleviate phytotoxicity, and to apply a certain amount of lime powder when watering. The acidic herbicide is neutralized, whereby the residual agent is washed and discharged, and the residual herbicide content in the soil is reduced. At the same time, strengthen field management and enhance corn resistance.
Second, strengthen field management, and promote early growth of seedlings. In combination with watering, the application of decomposed human and animal excrement, ammonium bicarbonate, ammonium nitrate, urea and other quick-acting fertilizers to promote root development and regeneration; strengthen cultivating loose soil, break soil compaction, promote beneficial microbial activities, and accelerate the decomposition of soil nutrients, Enhance the ability of roots to absorb nutrients and water, so that plants can resume growth and development as soon as possible, reducing the damage caused by phytotoxicity. At the same time, it can also be sprayed with 1% to 2% urea or 0.3% potassium dihydrogen phosphate solution to promote the growth and development of the crop and restore growth as soon as possible.
3. Spray plant growth regulators or antidote to different agents. Plant growth regulators have a good stimulating effect on corn growth and development. At the same time, zinc, iron, aluminum and other micro-fertilizers and foliar fertilizers can be used to promote crop growth and effectively reduce phytotoxicity. Commonly used plant growth regulators are gibberellic acid, eucalyptus vinegar, sodium nitrophenolate.
4. Spraying antidote can reduce or eliminate the toxicity of grass to crops. For example, tea is a selective seed dressing protectant that can be absorbed by seeds to protect the corn from herbicides such as acetochlor, butachlor, and oxalic acid.
Fifth, timely remediation of deforestation. For those fields where the phytotoxicity is heavier and there is no remedy, it is necessary to hurry to replant and replant and make up for the losses.
(1) are generally made of carbonized carbon steel (accounting for 99% of total production). It can also be made of stainless steel or non-ferrous metals.
(2) The product must be heat treated. Carbon steel tapping screws must be carbonized and stainless steel tapping screws must be solution hardened. In order to make tapping screws to meet the requirements of the standard of mechanical properties and performance.
(3) The product surface hardness is high, the core toughness is good. That is, "soft inside strong outside". This is a major feature of tapping Screw performance requirements. If the surface hardness is low, it can not be screwed into the matrix; If the core toughness is poor, a twist will break, can not be used. So "inside soft outside steel" is self-tapping screw to meet the use of performance, very important requirements.
(4) The surface of the product needs surface protection treatment, generally electroplating treatment. Some product surface must be treated by phosphate (photostatting), such as wall panel self - tapping screws for photostatting.
(5) Production by cold heading process. It is recommended to use high-speed cold heading machine and high-speed wire rolling machine or high-speed planetary wire rolling machine. High speed is emphasized here to ensure product quality. Only the head of tapping screw produced by high-speed machine is well formed and the thread quality is high.
Remedial measures after the occurrence of corn phytotoxicity
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