Greenhouse vegetables judge whether the vegetables grow good or bad. The most important thing is to look at the leaves. If the leaves are flexible, thick, the skin is bright and the color is green, it is a normal sign of the leaves. However, in recent years, many growers have indicated that yellow leaves in greenhouses are frequent, which affects the yield and quality of vegetables. So how to effectively reduce the yellow leaves? Reduce the yellow leaves in the greenhouse, rooting is the foundation, and raising leaves is the key. Let's take a look at the following. How do you grow vegetables in greenhouses? 1, rational use of foliar fertilizer Foliar fertilizer is a fertilizer that is directly sprayed on the surface of the leaf for the leaf to absorb. The vegetable grower can reasonably and effectively select the foliar fertilizer according to actual needs, and focus on supplementing trace elements such as calcium, boron, zinc and iron, as well as supplementing amino acids and alginic acid. Organic functional products such as chitin. From the seedling stage, foliar fertilizer can be sprayed, such as chitin and alginic acid, which can increase leaf thickness and improve disease resistance; calcium fertilizer can increase cell strength and activity, improve stress resistance and reduce disease occurrence; boron fertilizer can promote Flower bud differentiation. 2. Reasonable spraying of medicament In recent years, the new greenhouse facilities are getting bigger and bigger. It is two or three hundred meters at a time. Spraying once, at least a dozen barrels of water and several hundred kilograms of liquid medicine. In order to reduce the burden of spraying, vegetable farmers often use a large number of compounding agents, fungi, bacterial diseases, viral diseases, various pests, foliar fertilizers, and a combination of seven or eight kinds of drugs in one spray, which has become the norm. It causes widespread phytotoxicity and seriously affects the photosynthetic efficiency of the leaves. Practice of reducing phytotoxicity in greenhouse vegetables 1. Choose a highly safe agent and reduce the number of complexes. Pests and diseases should follow the principle of prevention and comprehensive prevention. Early detection, early use of drugs, diseases and pests should be used separately to avoid excessive compounding. At present, most of the drugs are broad-spectrum drugs. When they are properly combined, only 2-4 kinds of drugs are needed, which can achieve comprehensive and good preventive effects without excessive addition of drugs. 2. Use more biological agents to improve the environment inside the shed Bacterial bacteria such as Bacillus subtilis are effective in preventing diseases, improving leaf micro-ecology, and improving disease resistance, and do not produce drug resistance, have high safety, do not cause phytotoxicity, and can be used as a preferred agent for preventing diseases. 3, improve the spray equipment Choose a spray device with good atomization effect, spray evenly, and do not repeat the spray, which can reduce the chance of phytotoxicity. The above is the measures for greenhouse yellow leaves in greenhouses and the practice of reducing phytotoxicity. In order to effectively ensure the benefits of greenhouses, we must take measures for high-yielding yellow leaves. I hope that the contents of Xiaobian can help the farmers. For the wonderful pictures and popular comments on the yellow leaves of the greenhouse, you may be interested in the following recommended contents. Welcome to read. 8 Inch Biometric Tablet,Industrial Rugged Android Tablet,Portable Fingerprint Tablet,Rugged Portable Time Attendance Tablet Shenzhen Bio Technology Co., Ltd , https://www.huifantech.com
