With the development of modern agriculture, the application of greenhouses (sheds) in agricultural production is becoming more and more widespread. There are tens of thousands of hectares of applied area in Hunan Province. However, a large part of these greenhouses (greenhouses) are used improperly, with little or no economic benefit. According to the short winter climate characteristics of our province, the key to raising the economic benefits of greenhouses is to reduce costs and adopt comprehensive measures for annual use. First, choose the type of greenhouse (house) according to your needs. There are many types of greenhouses (greenhouses). The larger area of ​​promotion in Hunan Province is mainly multi-span greenhouses and GP622-1.2/2.5 plastic greenhouses (a 6-meter wide, 2.5-meter-high roof, and 1.2-meter-high steel skeleton plastic truss built with 22mm diameter galvanized steel pipe as an arch ). The former has a high cost, and if it is heated in the winter, the operating costs are also high and it is economically uneconomical. The latter is relatively low cost, but the strength of the steel pipe is not large, the greenhouse space is small, the use is not wide, it is difficult to produce the expected benefits. In order to overcome the drawbacks of the two types of greenhouses (greenhouses), the author and related personnel designed and promoted a GP832-1.7/3.5 plastic greenhouse (with a diameter of 32mm galvanized steel pipe for the construction of the arch 8 meters wide, top Height 3.5 meters, shoulder height 1.7 meters of steel skeleton plastic greenhouse). This kind of greenhouse has a low cost, and the cost per unit area is similar to that of the GP622-1.2/2.5 plastic greenhouse, but it has the function of a multi-span greenhouse and is beautiful and durable. Users generally reflect well. Second, planting high-efficiency crops. Greenhouses (greenhouses) are relatively expensive to invest in open-air cultivation. Crops that can be planted in the open air all year round and have low returns are not planted in greenhouses. From the experience of using greenhouses (greenhouses) everywhere, the best benefit is seedling breeding. If Longhui County Agricultural Technology Promotion Center invested tens of thousands of yuan to build a 1200m2 plastic greenhouse with GP832-1.7/3.5 model, the virus-free fruit saplings will be bred and the annual income will be 100,000 yuan. Some township agro-technical stations invested 230,000 yuan, built 2 greenhouses, and bred vegetable fruit and vegetable seedlings. They both promoted the fine varieties and gained considerable income, and some of them also became the main sources of income for agricultural technology stations. In addition, the production of off-season vegetables can also produce better results. Third, the use of comprehensive supporting technologies to increase the use of greenhouses (greenhouses). Greenhouse (greenhouse) commonly used supporting technologies are: 1 spray drip irrigation technology. Compared with conventional production, the output of greenhouse vegetable drip irrigation can be increased by about 20%, and the economic benefit can be increased by more than 30%. Greenhouse (greenhouse) seedlings use micro-irrigation better. Longhui County Agricultural Technology Extension Center nursery sunny water spray costs 60 yuan per day, spend a few thousand dollars to install micro-sprinkler irrigation, spray evenly, one year can save labor costs 10,000 yuan, high emergence rate, seedling growth is also good. 2 shade cooling cultivation. High-temperature seasonal greenhouses (sheds) cover shade nets to lower temperatures and improve yield and quality. If the simultaneous use of micro-spraying reduces the impact of high-temperature weather, greenhouses (greenhouses) can also play a role in the summer. 3 Use insect nets. The use of pest control nets has low cost and the effect is very satisfactory. Generally, the output will increase by more than 10%, and the economic efficiency will increase by more than 20%. Especially for fast-growing leafy vegetables, the use of insect-proof nets can greatly reduce the application of pesticides, reduce pesticide residues in vegetables, reduce costs, and increase vegetable prices and economic benefits. 4 greenhouses early ripening and dense planting techniques. Greenhouses use this technology to cultivate pumpkins, cucumbers, loofahs, etc. The output value can increase by more than 20%. 5 Play the role of a scaffold in a greenhouse (house). The use of greenhouses (sheds) as supports for balsam pears, cucumbers, gourd gourds, beans, etc., can save the cost of stents and increase production. The economic benefits can be increased by about one-third. As long as the greenhouses (greenhouses) are used rationally, they can produce higher benefits. Generally more than double the benefits of open cultivation. In order to promote the popularization and application of greenhouses (greenhouses) and their comprehensive supporting technologies, in addition to contracting greenhouses (greenhouses) and irrigation projects, Guangtian Modern Agricultural Development Co., Ltd. also provides greenhouses (greenhouses) accessories, spray drip irrigation products, and greenhouse films. Shade nets, insect nets, etc., and provide free technical advice. If necessary, contact the author of this article. Mobile phone.
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