施用化肥增产效果的高低,受气候条件的影响,大致来说,一、在低温季节,作物吸收养分能力弱,一般不宜施用不能被土壤吸附的化肥(例如硝态氮化肥),否则,未能被利用的养分,遇雨容易随水流失,降低肥效。需施肥时,以施用能被土壤吸附的、例如铵态氮化肥为宜。二、有些化肥,例如碳铵,在气温20℃以下,空气干燥时性质稳定,但在高温、 Generally speaking, first, in low temperature season, the ability of crops to absorb nutrients is weak. It is generally not advisable to use chemical fertilizers that can not be adsorbed by soil (such as nitrate nitrogen fertilizer), otherwise, the failure to apply The nutrients that are utilized are easily lost in the rain and reduced in fertilizer efficiency. When fertilization is required, it is advisable to apply the soil to be adsorbed, for example, ammonium nitrogen fertilizer. Second, some fertilizers, such as ammonium bicarbonate, the temperature below 20 ℃, the air is stable when dry, but at high temperatures,