摘要
为弄清不同施肥结构对侵蚀红壤的修复效应,研究施化肥(NPK)、施化肥+有机肥(NPKM)、施化肥+土壤调理剂2(NPKR2)与不施肥处理(CK)对不同母质发育的侵蚀红壤肥力和抗侵蚀性的修复效应。结果表明:施肥可以在一定程度上提高土壤碱解氮、有效磷、速效钾、有机质含量和生物产量,但产量并不稳定;其中,有机无机肥配施处理(NPKM)较其他施肥处理可以明显提高土壤碱解氮和有机质含量,显著降低土壤的可侵蚀性K值,提高土壤的抗侵蚀能力,因而明显提高作物产量;化肥加调理剂处理(NPKR2)较其他施肥处理可以明显提高土壤有效磷和速效钾含量,还可以明显提高土壤粉粒和砂粒百分比含量,显著降低黏粒百分比含量,土壤的可侵蚀性K值最大;在花岗岩红壤和板岩红壤中黏粒百分比含量为培肥前最高,在均质红壤和网纹红壤中黏粒百分比含量为NPKM处理最高。
In order to study the repairing effects of different fertilizing structure on eroded red soil, do re- search on restoration effects of treatments： NPK, NPKM, NPKR2 and CK on fertility of eroded red soil and anti eriodibility. The results showed that fertilization could increase the content of available nitrogen, availa- ble phosphorus, available potassium, organic matter of soil and biomass. However, the yield was not stable~ contents of available nitrogen and organic matter of NPKM were significantly higher than other treatments＇. However, content of erosion K of NPKM was lower than other treatments＇. NPKM could improve the ability of anti-erosion and increase the yield of crop significantly. Compared to other treatments, NPKR2 increased the content of available phosphorus and potassium. It could also increase the content of soil silt particle and sand particle. However, it decreased the content of clay. The erodability K of NPKR2 was the highest among all the treatments. Content of clay in granite red soil and slate red soil was the highest before the experiment. Percentage content of clay of NPKM was the highest in homogeneous horizon red soil and reticulate horizon red soil.
出处
《水土保持学报》
CSCD
北大核心
2012年第4期54-58,63,共6页
Journal of Soil and Water Conservation
基金
国家"十一五"科技支撑计划项目"湘中南低山丘陵区红壤退化防治与生态农业技术集成和示范"(2009BADC6B005-5)
"城郊土壤化学退化的调理修复与功能提升技术"项目(2008BADA7B02)
关键词
施肥
调理剂
侵蚀红壤
修复
fertilization conditioner eroded red soil restoration
