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掌握池塘中养殖虾类的数量非常重要,这是养成期间计算投饵量的重要依据。生产中估计虾池中虾的数量,有以下几种测定方法。 1 旋网计数法按养殖池地形、地貌以及虾类分布区进行分片抽样,求得每网平均虾数,换算成每平方米的虾数,乘以养殖池水面总面积(m~2),再乘以逃网系数,即可计算出池中虾类总数。旋网的网目应当足够小使得虾跑不出去。计算公式如下：池内虾类总数(尾)=每网平均虾数(尾)/旋网撒开的面积(m~2)×养殖池面积(m~2)×逃网系数。逃网系数是将该池以旋网计数所得出的虾类总数除以实际收虾总尾数所得之商数。这种方法比较准确,但应考虑到随着水深的增加,网口逐渐缩小。旋网计数法适用于东方对
It is important to know the number of farmed shrimp in the pond, which is an important basis for calculating the amount of feed during cultivation. Estimated shrimp pond production in the number of shrimp, there are several methods of determination. 1 Rotary nets count method according to the topography of the ponds, topography and shrimp distribution area sampling, the average number of shrimp per net, converted into shrimp per square meter, multiplied by the total surface area of breeding ponds (m ~ 2) , Multiplied by the escape coefficient, you can calculate the total number of shrimp in the pool. Rotary net mesh should be small enough so that shrimp can not run out. The formula is as follows: The total number of shrimp within the pool (tail) = average number of shrimp per net (tail) / spinneret spreading area (m ~ 2) × pond area (m ~ 2) × escape coefficient. The net escape coefficient is the quotient obtained by dividing the total number of shrimp in the pool by the net count by the total number of shrimp collected. This method is more accurate, but should be taken into account as the water depth increases, the network port gradually reduced. Rotary net counting method for the East on