Cultivate all-round lack of necessary understanding of the protection facilities, think that there is a protected area, vegetables can be cultivated anytime, anywhere, blindly planted in advance or the pursuit of anti-season cultivation, often leading to cold damage, high temperature damage, etc., can not get the desired production effect, there is Even led to the protection of cultivation than the open field. Protected land can only be warmed or cooled appropriately. Generally, there are shortcomings such as relatively low light, high humidity, and serious soil salinization in protected areas. There are some varieties of protection sites, temperature and humidity management, fertilizer application, and pest control. Special requirements and laws, so cultivation is not a panacea. Heyin Cinnom,Seasoning Granular Cumi,Powder Cumin Powder,Cumin Powder For Barbecue Zhejiang Shanying Trading Co.,Ltd. , https://www.shanyingtrading.com
The over-concentration of plants is due to the large investment in facilities, and they want to improve the planting density and other measures to achieve the goal of improving the city's output, increasing production, and improving economic efficiency. In fact, this is not correct. The water and fertilizer in the protected area are abundant, the humidity is high, and the temperature is high. The growth of the same species in the protected area is strong. When the planting density is too high, it often causes field canopy closure, poor ventilation and ventilation, and it easily induces occurrence of disease. Therefore, compared with the open field, the phototype of the same species is poor, and the density of planting should be smaller than that of exposed land.
Neglecting micronutrients Some growers often attach importance to the application of large amounts of elements, and contempt or do not supplement micronutrients at all. This is not acceptable. Protected land is a relatively closed production environment. Long-term lack of supplements of trace elements, it is easy to induce rational diseases, but easily considered to be bacterial or fungal, viral diseases, use chemical agents to no avail. Fertilization of vegetables should be based on the principles of improving soil fertility, reducing nitrate content, improving vegetable quality, and increasing yield. Mainly organic fertilizer, promote formula fertilization, do control nitrogen, phosphorus, potassium, promote the use of biological organic fertilizer, compound fertilizer, vegetable fertilizer, targeted fertilizer application. The use of nitrogen fertilizer is timely and appropriate, but no amount of fertilizer is applied, and chemical fertilizers and the like are prohibited for 20 days before harvest.
Abuse of hormone plant hormones and plant growth regulators in the regulation of vegetable growth, prevention of fruit and vegetable leggy, promotion of rooting, cultivation of strong seedlings, control of melon sexual differentiation, prevention of falling fruit, control of fruit maturity, enhanced resistance and storage preservation The application plays a large role, and is therefore widely used in various vegetables such as melons, beans, green leaves, and eggplants. However, the production of hormones is often inappropriate, excessive concentrations, improper use period or repeated use of abuse, will cause losses to the production of vegetables, such as the concentration of fruit hormones in the low temperature period is too large, easily lead to abnormal fruit and so on. Therefore, in the understanding of its mechanism of action, to master its concentration, use period, the number of uses. Unpolluted vegetables and green vegetables are generally not recommended for use, while organic vegetables are prohibited.
Poor management lacks scientific control technologies for environmental conditions such as temperature, light, water, and gas. Insufficient insulation effect in winter production greenhouses, shading in summer protected areas, poor ventilation, excessive or low temperature management, excessive watering in cloudy days, soil compaction around the rhizomes, and high environmental humidity are not conducive to plant growth and flowering. result. In production, we should seize its key point and “look at the greenhouse on the third dayâ€. For example, the planting of protected fields in summer should start with planting, protect the whole plant, prevent rainstorms, prevent high temperatures, prevent insects, and prevent glare. Should do a good job of heat preservation, lightening, and humidity. Temperatures above 30 °C, or below 10 °C, must pay special attention to management.
The cost of construction and production of successively severely protected lands is high. In order to recover costs as quickly as possible, growers often use the facilities of protected areas to plant a single crop year after year, and the ground force cannot be restored, eventually leading to aggravation of various diseases, lower yields, and lower quality. As a result, production cannot be carried out. For crops of the same crop family, the general avoidance of continuous cropping, and the continuous cropping of the same crop for at least two years. In the protected areas, due to the absence of severe winter heat, the eggs of the disease-producing worms are multiplying quickly and in large quantities. It is even more necessary to implement rotation cropping. The general rotation period is 3 to 4 years. In principle, a crop with high yield and high efficiency should be used as the main crop for crop rotation, and crop rotation should be conducive to the control of pests and diseases, increase of soil fertility, and attention should be paid to the interrelationship between the organisms, so as to make the crops before and after the crops and adjacent crops play a mutually beneficial or partial role. Can also use crops and weeds to control the occurrence of pests and weeds.
Inadequate use This is another extreme in the use of facility cultivation. Some are used only for vegetable seedlings, some are used only for cultivation in the early spring season, and other facilities only serve as a scaffolding for vines. They do not pay attention to "two networks." "A film" and other supporting facilities. Use insect nets to prevent insects and use insecticidal lamps to kill insects. Shade nets can be shaded in summer and autumn to prevent insects and winters, while plastic film can increase temperature, heat preservation, humidification, and rain protection. The purpose is to create environmental conditions suitable for the growth of vegetables, prevent disease occurrence and pest infestation, and reduce pesticides. use. Such as the production of high-quality pollution-free vegetables, small sheds, etc., etc., can be used for cultivation after the fall, such as cultivation after the fall, and overwintering cultivation, so that many vegetables can achieve annual production, annual supply, and achieve better economic benefits.