白云石对酸性红黄壤上油菜、玉米的效应

Effect of Dolomite Application for the Improvement of Acid Red-yellow Soil on Rape and Maize Yield

施用白云石改良酸性红黄壤田间定位试验第 3、4季油菜和玉米的试验结果表明 :施用白云石的处理与对照比较仍能明显地促进油菜、玉米的生长发育 ,改善作物经济性状 ,显著地提高作物的籽粒产量。其中施用 160 0kg/hm2 白云石处理的油菜、玉米的产量最高 ,分别为 2 5 18、492 8kg/hm2 ,比对照分别增产 16.2 %和 44 .6% ;经济效益最好 ,经济效益分别为 473 4和44 3 5元 /hm2 。

The experiment in effect of dolomite on amelioration of acid red-yellow soil with the third and fourth seasons rape and maize as trial was conducted. The results indicated that the application of dolomite could promote crop growth, improve yield components and raise yield. Rape and maize can obtain the highest yield and the best economic benefit as the amount of dolomite application was 1 600 kg/hm 2.The results also showed that the application of dolomite has notable residual effect.