摘要
总结分析了1999～2007年宁远县水稻土的土壤肥力监测、肥力试验及农户施肥效果。结果表明:9 a间土壤中有机质平均含量下降1 g/kg,不同土种区域有机质含量变化差异较大,浅黄泥等土种有机质含量平均上升了5.1 g/kg,河沙泥等土种减少了4.7 g/kg;监测区域内约有25.6%的耕地肥力水平逐年上升,有53.3%的耕地土壤肥力呈下降的趋势;长期不施任何肥料情况下,地力产量为施肥区的64.3%,并且产量有下降的趋势,不施肥严重影响作物产量的提高;30%有机肥与70%无机肥的配合施用为最佳配施比例。最后报道了利用该监测成果指导全县大面积的配方施肥和农作物秸秆还田所取得的成效。
The results of monitoring and experiment of rice soil fertility and fertilizing effects of farmer in Ningyuan County in 1999~2007 were summarized and analyzed.The results indicated that the average content of organic matters in soil decreased 1 g/kg;the content of organic matters in different soil types changed significantly,in which,the content of organic matters in six soil types（shallow yellow mud,etc.） averagely increased 5.1 g/kg,and that in five soil types（river sediment,etc.） averagely decreased 4.7 g/kg;within the monitoring area,25.6% of cultivated land fertility increased year by year,and 53.5% of cultivated land fertility showed decreasing trend;under the condition that non fertilizer application for a long-term,the capability yield in this area was the 64.3% of that in fertilizer application area,and the yield had decreasing trend,therefore,non fertilizer application will seriously impact the increase of crop yield;30% of organic fertilizer combined applying with 70% of inorganic fertilizer is the optimum formula for fertilizing.In the end,the strategy that using this monitoring results to enhance soil fertility and the achievements that using this monitoring results to guide formula fertilizing in large area of whole county and straw of crop returning to field were introduced.
出处
《湖南农业科学》
2011年第1期54-57,共4页
Hunan Agricultural Sciences
关键词
耕地
土壤肥力
长期定位监测
有机质
成果应用
cultivated land
soil fertility
long-term located monitoring
organic matter
application of achievement
