| 摘要: |
| 蔬菜塑料温室电加温线育苗,是陕西地区正在推广的一种蔬菜育苗新形式。通过试验表明:①在西安地区采用塑料温室电加温线育苗,室内必须有小拱棚覆盖,才能有效地保证各种菜苗所需的地温和气温。小拱棚的保温性能:农用无纺布与塑料薄膜比较,夜温可提高3.7℃,地温可提高11℃。②在塑料温室电加温育苗中,由于蔬菜种类不同,耗电量也不同:番茄耗电量最少,每平方米总耗电量为7度;黄瓜次之,每平方米总耗电量为14度;茄子、辣椒最多,每平方米总耗电量为27度。③塑料温室电加温线育苗,与常用的温室炉灶加温育苗、阳畦电加温线苗以及玻璃温室架式育苗相比,其苗子质量虽然差异不显著,而它的投资和经济效益却优于这三种形势。 |
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| An Analysis of Seedling Breeding Effects by Electric Heating Wires in Plastic Vegetable Greenhouse |
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| Abstract: |
| Breeding vegetable seedlings by electric heating wires in the plastic vegetable greenhouse is a kind of new vegetable seedling breeding patterns being extended in Shaanxi Province.the experiments have demonstrated:(1)when the electric heating wires are used to breed vegetable seedlings in the plastic greenhouse in Xian areas,there must be a small arched cover tent inside of the greenhouse.Thus,both geothermal and atmospheric temperatures nedded for vegetable seedlings of different species can be effectively ensured.As to heat-shielded performaces of the small arched tent,the night temperature can be raised to 3.7℃ and the geothermal temperature raised to 11℃ in comparsion of agricultural used adhesive-bonded cloth with plastic films for the cover.(2)In seedling breeding by electric heating wires in the plastic greenhouse,power consumption is different because of various vegetable species.Power consumption for tomatoes is the least with 7Kw-hrs/m2 in total;that for cucumber is the next with 14Kw-hrs/m2 in total;that for egg plant and pepper are the most with 27Kw-hrs/m2 in total.(3)comparison was made among seedling breeding by eletric heating wires in the plastic greenhouse,that by kitchen range heating,that in the sun-facing furrows by electric heating wires in the usual greenhouse and that by shelf patterns in the glasshouse.As a result,though differences among seedlings are not very significant,inputs and economical returns of the former are much more superior to the other three patterns of the latter. |
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