Four conditions of vegetable malformed seedlings in greenhouses should be well protected

Wearing a cap: The symptoms are that after the seedlings are unearthed, the mesothelium is not detached from the embryo, and the embryonic leaves are difficult to open, the photosynthesis is affected, and the poor growth is developed. Control measures: First, apply organic fertilizer and pour the bottom water, cover the soil properly after sowing; second, timely cover the insulation film and straw curtain.

æ²¤æ ¹è‹—: The symptoms are no roots or few new roots and adventitious roots. The root bark turns brown and gradually rots, causing the plants to turn yellow and wilting. Control measures: First, maintain proper temperature, choose a well-ventilated land as a seedbed, increase the ground temperature; maintain the temperature of the seedbed, 20 Â°C -25 Â°C during the day and 15 Â°C at night. The second is to reduce the humidity inside the shed, and do not wet in the seedbed. The third is to pay attention to the increase of light, to choose a place with sufficient light to build a seedbed. Fourth, the application of farmyard manure can not only fertilize the soil, but also cultivate strong seedlings, but also increase the ground temperature and reduce the occurrence of diseases.

Long seedlings: Symptoms are thin stems, long internodes, thin leaves, and pale, mainly caused by high temperature and high humidity. Control methods: First, according to the requirements of temperature and humidity of seedlings, timely ventilation, especially at night, the temperature should be lower; second, to ensure the clean cover, to increase the light intensity and illumination time; third, to prevent seedlings from being overcrowded To ensure that the seedlings have sufficient nutrient supply.

Aging seedlings: The symptoms are small seedlings, short stems, roots aging is not easy to regenerate new roots, leaves are small and thick. The cause is that the seedling age or seedling time is too long. Precautionary measures: In the management of nursery, it is necessary to strictly control the age of the seedlings. It is best to adopt a method of controlling temperature without controlling water.

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BRIEF INTRODUCTION

Henan Yuteng Grinding Material Co., Ltd. is located in Kaifeng City, Henan Province. Is a set of production, research and development, service as one of the grinding agent, grinding, polishing products professional company, specializing in the production and sales of coated grinding tools derived ancillary products: flocking sand disc, blade, all kinds of special-shaped grinding disc, sponge grinding block, steel paper disk, ring sand belt, sand ring and automotive polishing products.

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