在滇中地区的几种作物上施用含稀土复合肥比施用等养分含量的不含稀土复合肥确有显著的增产效果 ,小麦增产为 1 2～ 2 8% ,油菜增产 2 .7～ 9.8% ,水稻增产 6.8～ 1 3.2 % ,玉米增产 7.9～ 1 3.4%。稀土协调了作物产量构成因素 ,如小麦平均穗粒数提高了 0 .3～ 3.3,千粒重增加了 4～ 6.5克。施用含稀土复合肥有较显著的经济效益 ,例如小麦每亩可纯增收 1 1～ 50元。试验表明 ,施用含稀土复合肥 ,最好在前期及中期施用 ,不同的作物要根据其需肥规律加以调整才能达到最佳增产效果。 Rare earth compound fertilizer containing rare earth compound fertilizer on several crops in Central Yunnan Province did not significantly increase the yield compared with the control. The yield of wheat increased from 12% to 28%, and the yield of rape increased from 2.7% to 9.8% , Rice yield 6.8 ~ 1 3.2%, corn yield 7.9 ~ 1 3.4%. Rare earth coordinates the crop yield components, such as the average number of grains per spike increased 0.3 ~ 3.3, 1000 grain weight increased by 4 ~ 6.5 grams. Application of rare earth compound fertilizer has more significant economic benefits, such as wheat can be purely added per acre 11 ~ 50 yuan. Tests show that the application of rare earth-containing compound fertilizer, the best early and mid-term application, different crops according to their need to be adjusted to achieve the best fertilizer yield.