黔中坝地黄壤旱地高产培肥模式研究

Optimum Scheme of Fertilization Measures for High yield and Sustaining Soil Fertility in Yellow Upland Soil

通过培肥试验研究 ,建立坝地黄泥土玉米产量与施肥的数学模型 ,解析了氮肥、磷肥、堆肥及圈肥的效应及交互作用。优选出的施肥组合方案为 :施用尿素 2 1～ 2 4 kg/6 6 7m2 ,钙镁磷肥 0～7.5kg/6 6 7m2 ,堆肥 0～ 12 5kg/6 6 7m2 ,圈肥 937.5～ 112 5kg/6 6 7m2 ,可望获得≥ 50 0 kg/6 6 7m2 的玉米产量。土壤养分分析结果表明 ,只要施肥保持在零水平 (即每 6 6 7m2 施尿素 12 kg、钙镁磷肥 15kg、圈肥 12 50 kg)以上 ,就能在保持土壤目前养分水平的基础上逐步培肥 ,实现该类土壤生产力可持续发展。

By using the results of fertilization field trial , building up the mathematical model between corn yield and fertilization, analyzing the efficiency and interaction of N, P fertilizer, compost and manure, the optimum scheme sifted was that applying urea 21～ 24 kg/667m 2 , Ca Mg phosphate 0～7.5 kg/667m 2 , compost 0～125 kg/667m 2 ,farmyard manure 937.5～1 125 kg/667m 2 ,corn yield of more than 500 kg/667m 2 could be obtained. The analysis results of soil nutrient showed that providing fertilization level was above urea 12 kg/667m 2 ,Ca Mg phosphate 15 kg/667m 2 ,manare 1 250 kg/667m 2 ,the soil present nutrient level could be sustained and raised.