目前,我区各地都广泛推广应用腐殖酸类肥料。为明确其经济效益,我们于1975年早造至1977年晚造,连续三年六造进行了腐殖酸铵对水旱地红壤的改良,培肥和增产效果的研究。现将结果整理如下,供参考。 At present, our region has widely promoted the use of humic acid fertilizer. In order to clarify its economic benefits, we made in early 1975 to late 1977 made late in 2006 for three consecutive years made a huaconic ammonium red soil improvement, fertilization and yield effects. Now the results are organized as follows for reference.