Ammonium Chloride can promote photosynthesis

Ammonium Chloride can promote photosynthesis and is conducive to forming fiber and increasing its toughness and tension. It can also control the concentration of soluble nitrogen compounds in rice plants and promote the formation of chlorogenic acid (C16H18O9) that is the “resistance substances” of rice blast, thereby reducing rice lodging and pest invasion. The use of ammonium chloride for cotton and other fiber crops have significant effects of increasing yield and fiber quality. The degree of acidification of ammonium chloride to soil is greater than that of ammonium sulfate. The reason is that ammonium chloride produce ammonium chloride after the selective absorption of NH4+ by crops while ammonium sulfate produce calcium sulfate. Because the solubility of the former is larger than the latter, so the calcium ion loss of the former is more than that of the latter, resulting that ammonium chloride is more easy for soil acidification and compaction. So the ammonium chloride for acid soil should be equipped with lime or other alkaline fertilizer, but should not be used for mixed application.

The Decomposition temperature of ammonium chloride is 337.8 °C. In this temperature, it dissociates into ammonia and hydrogen chloride and then , on cold exposure, re-synthesize small particles of ammonium chloride and white fog that is not easy to sink and very difficult to dissolve in water. The visible gas will change back to ammonium chloride.

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