Most vegetables require strong light conditions. However, in winter, especially in rainy and snowy weather, the light is weak, and the lack of illumination in greenhouse vegetables is a common problem. Insufficient illumination not only fails to produce more vigorous photosynthetic activity, but also reduces transpiration, and plants grow weakly, which affects the yield and quality of vegetables. For example, the function of tomato pollen is declining and infertility under low light conditions; the appearance of short inflorescences of eggplants affects pollination; the malnutrition of loofahs and watermelons in the body causes flowering and fruit drop. Some experts call these phenomena opacities. In order to help vegetable farmers effectively prevent vegetables from weak light, the author will be how to prevent the occurrence of low light symptoms summarized as follows: Improve lighting conditions in the shed Some cultivation techniques can significantly improve lighting conditions in the shed. For example, vegetable cultivating takes a north-south direction. The large row spacing is the same as the small row spacing, so that each row can obtain better lighting conditions; melon vegetables and solanum fruit Vegetables, such as pruning, removal of old leaves, timely binding of vines and other measures to adjust the plant's light conditions, can play a good role in adding light. The use of high quality non-drop film and keeping the quality of the clean dripless film will affect the light intensity in the shed, the high quality non-drop film has high light transmittance, and it is not easy to pollute the dust; the poor quality non-drip film is easy to be aged, easily polluted, and the light transmittance is also followed reduce. The drop-free film transmittance also decreases with longer use time. According to the measurement, within 13 days after the new high-quality non-drip film, the transmittance of the film at noon reached 93%. After 73 days, the light transmittance of the film was reduced to 81%. Therefore, cleaning the shed film often and keeping the shed film clean is one of the important measures for the prevention of low light disease in greenhouse vegetables. For a one-year shed film, the light transmission rate is generally reduced by 30% to 40%. For greenhouse vegetable production such as melon vegetables and solanaceous vegetables, legume vegetables, etc., which are more stringent in terms of light intensity, besides cucumber and wax gourd Good replacement of new high quality non-drip film. Plastic film mulching film coverage generally has better warming, water retention and soil consolidation effects, and has a good lightening effect. Due to the reflection of water droplets attached to the surface of the mulch and mulch, the reflected light and scattered light near the ground can be enhanced by 50% to 70%. For pepper, eggplant, tomato, etc., the lighting conditions can be improved, and the soil temperature can also be increased. . In the mulch, milky white and silver-gray films reflect more, the transparent film is centered, and the green film and black film are less reflective. In the growth of vegetable greenhouses, the previous medium-term brightening was obvious and it was not obvious after sealing. Therefore, in the greenhouse before the growth of vegetables combined with warming, can be covered with milky white film or silver-gray film (as well as the role of flooding) or transparent film. Precursors NO Beta-Alanine Amino Acid,Nutrition Supplement Beta-Alanine,Good Quality Beta-Alanine in Bulk,L-Citrulline Malate Fine Powder Excellent Health Products Co.,Ltd. , https://www.sino-excellent.com