滇中地区几种作物施用稀土复合肥效果研究

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。

Application of Rare-Earth Compound Fertilizer in Some Crops in Central Yunnan

The study indicates that the rare earth compound fertilizer has apparent effects on a few crops in Central Yunnan comparing with other fertilizers without rare earth, e.g.wheat increased yield 12~28%,rape 2.7~9.8%,rice 6.8~13.2%,maize 7.9~13.4%.Rare earth compound fertilizers can coordinate the yield components of crop,with wheat,for example grains per ear increasing by 0.3-3.3 and 1000-grain weight increasing 4~6.5g.The rare earth compound fertilizer also has noticeable economic returns with net profits of 11~50 yuan per mu.The experiment shows that the rare-earth compound fertilizer has its best effects as emergence fertilizer during earlier stage and mid term.Optimum effects of increasing yield can be obtained by adjusting nutrition of various crops.