用腐植酸-微量元素液肥在水稻孕穗期及灌浆期进行喷施,并与其它六种微肥(调节剂)进行了比较。结果表明腐植酸-微量元素液肥对水稻产量及其构成因素的效应最显著,增产幅度可达20％以上。在产量构成因素中起主要作用的是千粒重的变化。 The humic acid-trace element liquid fertilizer was sprayed at the booting stage and filling stage of rice and compared with the other six kinds of micro-fertilizer (regulator). The results showed that the humic acid - trace element liquid fertilizer on rice yield and its components of the most significant effect, increase rate of up to 20%. One of the major contributors to yield components is the change in 1000-grain weight.