大棚蔬菜种植技术（Vegetable cultivation techniques in plastic shed）.docVIP

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大棚蔬菜种植技术（Vegetable cultivation techniques in plastic shed）.doc

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大棚蔬菜种植技术（Vegetable cultivation techniques in plastic shed）

大棚蔬菜种植技术（Vegetable cultivation techniques in plastic shed） Vegetable cultivation techniques in plastic shed From the analysis of the structure and construction materials of plastic greenhouse, there are mainly three types of applications and more practical. 1. Simple bamboo and wooden structure greenhouse The greenhouse in this structure varies from region to region, but its main parameters and shed shape are basically the same, very much the same. In the span of 6-12 meters, the length of 30-60 meters, 1-1.5 meters, shoulder high ridge 1.8-2.5 meters high; to shed wide (span) direction every 2 meters with a column, the column 6-8 cm thick, arched top, buried 50 cm, bricks or tie bars, tamp the bamboo (rod): fixed on the column top arched, ends with crossbar buried and compacted; arch span 1 meters, and the longitudinal connecting rod, forming a whole; arch covering film, end after the tension film buried by arch lamination line or 8 lead wire, bamboo and other films in the surrounding soil compaction. The utility model has the advantages of convenient, low cost, easy construction; the disadvantage is the multi pillar, shading rate is high and the operation is not convenient, short life, poor performance of anti wind and snow loads. From the analysis of the structure and construction materials of plastic greenhouse, there are mainly three types of applications and more practical. 2 、 welded steel structure greenhouse The steel truss arch shed, flat steel, steel pipe or two with welded, winding with 16 mm steel or 6 in last quarter with 12 mm steel, longitudinal tie with 9-12 mm steel. The span is 8-12 meters, the ridge is 2.6-3 meters high, 30-60 meters long, and the arch is 1-1.2 meters. The longitudinal arch with tie rod or oblique rod fixedly connected to form a whole. Arch covered with film, stretch film line or 8 wire film fixed on both ends of the anchor. The structure of the greenhouse, skeleton, column free, and a large space, good transmission, convenient o