The latest way to teach you how to spray fertilizer on vegetables in greenhouse
Fertilizer concentration: in the fertilizer spraying process, the fertilizer concentration should be appropriate in order to get a good effect, the application concentration is too high, not only useless, but harmful. Generally speaking, the suitable spraying concentrations of various trace fertilizers are: boric acid or borax solution 0.05%-0.25%, ammonium molybdate solution 0.02%-0.2%, zinc sulfate solution 0.05%-0.2%, copper sulfate solution 0.01%-0.2%, ferric sulfate solution 0.2%-0.1%, and the fertilizer solution concentration is too low to achieve the desired effect.
Fertilizer spraying period: the period of spraying micro-fertilizer must be determined according to different vegetable varieties and different varieties of micro-fertilizer, and it is generally appropriate to spray when it is in bloom.
Usage: generally 40-70 kg fertilizer solution per mu, in order to wet the stems and leaves of vegetables.
Fertilizer spraying times: leaf spraying generally uses less fertilizer, so it is difficult to meet all the growth needs at one time, so it is necessary to appropriately increase the number of fertilization to make up for the lack of fertilizer application.
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The latest way to make greenhouse vegetables survive the winter safely
Pay attention to the indoor temperature and heat preservation. For the shed with less straw curtain, thin back wall and poor thermal insulation, it is necessary to increase the thickness of the straw curtain, use double curtains as far as possible, and cover the straw curtain with rain and snow plastic film to keep the straw curtain dry. If the temperature in the greenhouse is lower than
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The latest control methods of soft rot of Chinese cabbage
Chinese cabbage soft rot disease, also known as rotten pimple, mostly began to occur in the pericardium stage, the initial outer leaves in the sun, mostly drooping, but sooner or later still recovered, with the development of the disease, these diseased leaves no longer recover, revealing leaf balls. The lesion is in the form of water immersion.
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