石硫合剂的稀释和使用(不用比重计也可测波美度).doc

石硫合剂的稀释和使用1、原液的稀释在使用时应该注意药液浓度要根据植物的种类、病虫害对象、气候条件、使用时期等不同而定。使用前必须用波美比重计测量好原液的波美度，根据所需浓度计算出稀释的加水量。计算公式为：对水重量=（母液波美度稀释后波美度-1）母液重量。稀释倍数可按下列公式重量倍数稀释：加水稀释倍数（原液波美度需要稀释的波美度）需要稀释的波美度。例如液浓度为30波美度，要喷施5波美度石硫合剂，则加水稀释倍数为（30-5）/5=5；或加水量为（30-/5-1）*5=25。即5斤的30波美度石硫合剂原液配成0.5波美度的药液则需加水25斤。一般每喷水壶装水30斤，则需石硫合剂原液5斤，加水25斤即可。2、石硫合剂浓度简易测试法 取一干净玻璃瓶装满清水称其重量后倒出，然后再装满石硫合剂液称重。用称得装满石硫合剂重量减去装满清水重量之差乘以230，所得结果即为石硫合剂原液浓度。如空瓶加水重0.96公斤，空瓶加石硫合剂重1.06公斤，那么原液浓度为：（1.060.96）230=23（波美度）。 3、石硫合剂重量倍数稀释表使用波美度原液浓度（波美度）2021222324252627282930每公斤原液加水斤数0.05399.419.439.459.479.499.519.539.559.0579.0599.00.1199.209.219.229.239.249.259.269.279.0289.299.0.299.0104.109.114.119.124.129.134.139.0144.00149.000.365.669.072.375.679.082.385.689.092.3095.6099.000.449.051.554.066.559.061.564.066.569.0071.5074.000.539.041.043.045.047.049.051.053.055.0057.0059.000.632.334.035.637.339.040.642.344.045.6047.3049.000.727.629.030.432.8633.334.736.137.639.0040.4041.900.824.025.326.527.8029.030.331.532.834.0035.3036.500.921.222.323.424.5025.626.727.829.030.1031.2032.301.019.020.021.022.0023.024.025.026.027.0028.0029.001.512.3313.013.6614.3315.015.6616.3317.017.6618.3319.002.09.009.5010.0010.5016.011.5012.0012.513.0013.5014.002.57.007.407.808.208.609.009.409.8010.2010.6011.003.05.666.006.336.667.007.337.668.008.338.669.003.54.715.005.295.575.866.146.436.717.007.297.574.04.004.254.504.755.005.255.505.756.006.256.504.53.443.663.884.114.3