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污灌好处多。但如污水含毒严重,则万万不可用。如何能知道含有毒呢?可以用污水发“豆芽”来验证。比如你准备用这污水浇玉米地,那么就以生豆芽的方法,用污水生玉米芽。几天后芽生出来了,并且茁壮健康,那么这污水就可以用来灌溉农田。如果生不出芽,证明这种污水不能用。如果生芽太盛,须稀释后灌溉。稀释比例仍可用生芽法来确定。发芽正常的比例就最合适。
Sewage irrigation benefits and more. However, if the sewage is very toxic, you must not use it. How to know it contains toxic? Can use sewage to send “sprouts” to verify. For example, you are ready to use this sewage irrigation corn, then the method of raw bean sprouts, with sewage raw corn buds. A few days later the buds are born and they are healthy and healthy, then the sewage can be used to irrigate the farmland. If you can not bud, prove that this sewage can not be used. If the shoot is too thick, it must be diluted and irrigated. Dilution ratio can still be used to determine the bud method. The normal proportion of germination on the most suitable.