How to plant good summer vegetables
(A) Overcoming Challenges for High Yield of Artemisia selengensis
One of the main challenges in growing Artemisia selengensis is high temperature. This plant thrives in cool and humid conditions, making it semi-cold-resistant but not heat-tolerant. The ideal growth temperature ranges between 17-20°C, and when temperatures exceed 29°C, its growth is severely affected. Leaves become small and sparse, leading to poor yield. Summer heat is a major obstacle, so it's crucial to keep the greenhouse temperature within the optimal range. Effective cooling methods include using shade nets and spraying water on the structure. However, watering during the hottest part of the day is not recommended, as it can cause root damage due to sudden temperature changes, potentially killing young plants.
Another key factor is preventing lodging. When planted too densely or under conditions of excessive moisture and nutrients, the stems become weak, increasing the risk of falling over. This not only reduces yield but also causes lower leaves to rot due to poor air circulation. To prevent this, thin the seedlings early, keeping a spacing of about 2-3 cm. Applying growth regulators like 3000 times diluted solutions or 1500 times diluted liquid can help strengthen the stems and reduce lodging.
Rainwater entering the greenhouse is another concern, especially during summer rains. Waterlogging can lead to root rot, which significantly lowers yield. Therefore, it’s essential to cover the greenhouse with waterproof materials before rain. If rain does enter, drain the water immediately and replace it with clean water to avoid plant death.
Disease prevention is equally important. Healthy leaves are critical for commercial value, so controlling diseases like leaf spot and downy mildew is necessary. Fungicides such as Polyram and Ridomil can be used for prevention. In addition, pests like diamondback moth and cutworms should be monitored and controlled with appropriate sprays like methoxyfenozide.
(B) Growing Spinach in Summer: Key Considerations
Watering is a delicate task. After sowing, water lightly and ensure the soil remains moist without being flooded. If the soil dries out, add an extra watering session, but avoid heavy irrigation. If the weather is extremely hot, misting the leaves instead of flooding the ground is better to maintain moisture without damaging the roots. After watering, remove weeds and moss regularly to prevent them from competing for nutrients and causing disease. If moss becomes a problem, remove the shade net promptly to improve air circulation.
Preventing rain from entering the greenhouse is also vital. Before storms, check the plastic sheets for holes and repair them. Cover the sides of the greenhouse with additional film to stop rain from seeping in. In heavy rain, adding a layer of soil on top of the plastic can further protect the crop.
Disease control is crucial in summer. Spinach is prone to damping-off, downy mildew, and bacterial rot. A common practice is to spray a combination of Bactrol and Mancozeb every five days after the seedlings emerge. Later, applying Kocide 600 + Avermectin + Streptomycin at weekly intervals helps manage diseases effectively. Using yellow sticky traps and insect nets can also reduce pest infestations.
Lastly, spinach is prone to bolting (going to seed) in hot weather, which reduces its marketability. Harvesting early, around 20-25 cm in height, can help prevent this. Early harvesting ensures better quality and higher sales.
(C) Preventing Bolting in Summer Vegetables
Lettuce is a cool-season crop that struggles in high heat and humidity. Even heat-tolerant varieties can bolt easily during summer. To prevent this, growers should choose heat-resistant types like Italian Romaine. Proper management includes shading the plants with nets or covering the greenhouse with shade cloth. Spraying water during midday can also help lower temperatures.
Shortening the growth period by harvesting earlier reduces the chance of bolting. Plant density is also important—overcrowding can promote bolting. Keeping the planting density at 5000-5500 plants per acre is ideal. Intercropping with solanaceous crops or melons can provide natural shade, helping to keep lettuce cool and healthy.
(D) Protecting Leaves During Summer Cultivation
Watering is critical for maintaining leaf health. As temperatures rise, water evaporates faster, requiring more frequent irrigation. At around 35°C, watering every two days may be necessary. Check the soil regularly—if it doesn’t stick together, it’s time to water. Avoid waiting until the soil is completely dry, as this can cause leaf curling and wilting.
Foliar fertilization is another effective method. Applying a high-potassium foliar fertilizer every five days helps replenish nutrients and improves the plant’s resistance to stress, reducing the occurrence of leaf issues.
Thinning the plants properly is also important. A spacing of 3-4 cm between plants is ideal. Some farmers mistakenly space them wider to make the leaves thicker, but this can actually increase the risk of leaf burn due to more direct sunlight.
After heavy rain, it’s essential to rinse the leaves with water to remove mud and debris, which can hinder growth and reduce quality. Regular maintenance ensures healthier, more marketable crops.
The so-called veterinary drugs, referred to as veterinary drugs, refer to drugs that can regulate the function of livestock from the body and prevent and cure livestock and poultry diseases. Natural plants, animals, minerals, and synthetic drugs and immunizations can all be used as veterinary drugs. Feed additives used in animal production are also often included in the category of veterinary medicines
Veterinary Drug,Hyaluronic Acid Powder,Oxytoci Acetate,Dmaa Powder
Shaanxi YXchuang Biotechnology Co., Ltd , https://www.peptidenootropic.com