保定自动卷帘机厂

一是大棚太短不合算。大棚无论长短，东西两墙必须建设的，其所占用的土地面积在某种程度上是一定的，因此，建造蔬菜大棚东西两墙所花费的资金也是一定的。举例来说，建造50米长的大棚，与建造100米长的大棚一样，均需要预留出5—6米宽的地块来建造东墙或西墙，剩下的地块才是种植作物的面积，两者相比较而言，前者的投入产出比要远远小于后者，故以后者为好，不建议建造小于50米的“短小棚”。

A greenhouse is too short not worthwhile. Greenhouses in any length, things, for the construction of two walls must be its occupied land area is certain to a certain extent, therefore, build vegetable greenhouses things both the amount of money is also a certain wall. Build 50 meters long, for example, greenhouses, and building a 100 - metre - long canopy, all need to set aside 5-6 meters wide plots of land to build the east wall or the west wall, the rest of the plot is the area of the crops, comparison, both input and output of the former will be far less than the latter, therefore, with the latter as well, is not recommended to build "short shed less than 50 meters.

二是大棚超长又存在诸多弊端。首先，卷放草苫费劲。由于棚太长、太宽，一个大棚不得不使用至少两台功率在1.5千瓦以上的卷帘机拉放草苫，否则，仅使用一台卷帘机那是根本不可行的。若人工拉放草苫，工作强度太大。其次，增加了拉放棚面钢丝的难度。棚面钢丝需东西向拉放，而后固定在东西两墙根的地锚上。像200米长的大棚，拉放起棚面钢丝来，不仅难度大，而且也很难固定牢固。另外，更换棚膜难度也很大。一般100米长的大棚，更换棚膜十二三个人就够了，像这种200长的大棚，至少需要25人才可保证顺利完工。总结而言，“超长大棚”不适合目前的棚室蔬菜生产。

2 it is shed long and there are many disadvantages. First, put CaoShan volume. Because the tent is too long, too wide, a greenhouse have to use at least two power 1.5 kw or put CaoShan shutter machine, otherwise, only use a shutter machine that is simply not feasible. If artificial put CaoShan, working strength is too big. Second, increases the difficulty to put canopy face steel wire. Tent to wire should east-west, and then fixed on the two walls of anchor. Like the 200 - metre - long greenhouses, pull wire to put up the tent surface, not only difficult, but also difficult to fixed tightly. In addition, the replacement of films difficulty is very big also. General 100 - metre - long greenhouses, replace films. Three people is enough, like the 200 long greenhouses, need at least 25 people can guarantee the smooth completion. In conclusion, "super long greenhouses" are not suitable for the current PengShi vegetable production.

可见，为了避免浪费土地，节省资金，提高棚室的投入产出比，技术员建议广大农户，以建造80—100米的大棚最为适宜。

Visible, in order to avoid the waste of the land, save money, improve the input-output ratio of PengShi, technician suggest that the broad masses of farmers, to build 80-100 meters of greenhouse is most appropriate.