摘要
通过对红壤旱地连续13年定位监测研究,发现在红壤旱地长期坚持有机肥料与无机肥料配合施用,土壤有机质含量逐步提高,土壤有机质从开始的11.5g/kg上升到24.3g/kg,增加的有机质以易氧化的有机质为主,稳定性高的有机质较少。红壤长期施用化学磷,明显提高土壤有效磷含量,土壤供磷性能大为改善,施用有机肥料能减少土壤对磷的固定,提高磷肥的有效性和利用率。红壤长期施用单一化学肥料,土壤明显酸化,土壤交换性氢铝显著增加,作物生长变差,产量降低。施用有机肥料,明显降低土壤交换性氢铝含量,增加土壤养分,保持作物的稳产和高产。
A long fertilization experiment has been conducted on red soil upland for 13years. It was found that soil organic matter content increased from 11.5 g/kg to 24.3 g/kg, the most of soil organic matter increased was easy to oxidize, and less was stable. Applying fertilizer P in red soil for long term increased soil available P content and improved significantly the ability of soil on supplying P. Applying organic fertilizer decreased P fixation in soil and enhanced the utilization efficiency of P fertilizer. The soil became acid obviously, the exchangeable Al in soil increased significantly, crop grew poorly and the yield decreased after applying sole chemical fertilizer for long term. Applying organic chemical fertilizer decreased significantly exchangeable Al in soil, increased soil nutrients content, and kept the high and stable yield of crops.
出处
《水土保持学报》
CSCD
北大核心
2005年第1期97-100,144,共5页
Journal of Soil and Water Conservation
基金
国家基础研究重大项目"973"前期研究专项(2001CCB00800)
国家"十五"科技攻关项目(2001BA508B14)资助