不同改良剂对元胡-水稻轮作酸化土壤改良效果研究

探究不同改良剂对元胡-水稻轮作下酸化农田土壤的改良效果。以元胡-水稻轮作为研究对象,设置元胡单季施用改良剂和元胡-水稻两季均施用改良剂处理下,分析作物收获后土壤化学性状和作物产量经济效益。结果表明：石灰、钙镁磷肥、酸性土壤调理剂在两季作物上连续施用,提升土壤pH、交换性钙、两季作物产量的效果高于在元胡单季施用;连续施用钙镁磷肥和酸性土壤调理剂能补充土壤钾素、提高土壤交换性镁含量;连续施用钙镁磷肥还能显著增加土壤有效磷和两季作物纯效益。综合来看,在元胡-水稻轮作酸化农田土壤改良生产实践中,推荐在元胡季施用1500 kg/hm²、水稻季施用 750 kg/hm²钙镁磷肥,以获得良好的改良效果和经济效益。

Improvement Effect of Different Ameliorants on Acidified Soil of Rhizoma corydalis - Rice Rotation

To explore the improvement effect of different ameliorants on acidified soil of Rhizoma corydalis - rice rotation, we took the rotation as the research object, set treatments of applying different soil ameliorants to Rhizoma corydalis single-cropping and Rhizoma corydalis - rice rotation, and then analyzed the soil chemical properties and the economic benefits of crop yield after harvest. The results showed that continuous application of lime, calcium-magnesium-phosphate fertilizer and conditioner of acidic soil to the Rhizoma corydalis - rice rotation could improve soil pH and exchangeable calcium, and the yield of the two crops under the rotation was significantly higher than that of single-cropping application of ameliorants to Rhizoma corydalis. The continuous application of calcium-magnesium-phosphate fertilizer and acidic soil conditioner could supplement soil potassium and increase soil exchangeable magnesium content. The continuous application of calcium-magnesium-phosphate fertilizer could also significantly increase soil available phosphorus and the pure benefits of the two crops. On the whole, in the production practice of improving acidified soil of Rhizoma corydalis - rice rotation, it is recommended to apply calcium-magnesium-phosphate fertilizer of 1500 kg/hm² in Rhizoma corydalis cropping and 750 kg/hm² in rice cropping to obtain good soil improvement effects and economic benefits.