酸性黄红壤上施用白云石的作物产量效应和经济效益评价

在皖南酸性红黄壤旱地上进行了为期三年的定位试验,以探讨施用白云石改良土壤的效果。研究结果表明:施用白云石能显著地促进作物的生长发育和提高产量,小麦增产11.6％～13.4％,油菜增产9.4％～27.2％,红豆增产21.9％～49.7％,玉米增产10.9％～44.6％,黄豆增产6.6％～29.8％,其增产后效与使用量成显著正相关。施用白云石粉处理三年六季作物累计增加的纯收入为2511.6～5376.8元/hm2,产投比为27.9～12.4∶1。从作物的产量效应和经济效益评价来看,适宜的白云石粉施用量为1100～1600kg/hm2。

Effect of applying dolomite to acid red-yellow soil on crop yield and its economic evaluation

The effect of acid red-yellow soil reclamation with dolomite application on crop growth was tested. The results of a 3-year field experiment showed that dolomite application could significantly enhance the plant growth and crop yield. Yield increase had been realized in crops such as wheat, rapeseed, red-bean, maize and soybean, with 11.6%-13.4%, 9.4%-27.2%, 21.9%-49.7%, 10.9%-44.6% , 6.6%-29.8% increase, respectively. The results also showed that the crop yield increase significantly co-relate to the amount of dolomite applied. In total, the dolomite application to the acid red - yellow soil contributed to a net income of 2511.6-5376.8 yuan/hm2. The rate of input to output was 27.9-12.4 to 1. An appropriate dolomite application of 1100-1600kg/hm2 was recommended.