土壤肥力对红壤性水稻土水稻产量和氮肥利用效率的影响

彭卫福, 吕伟生, 黄山, 曾勇军, 潘晓华, 石庆华

Effects of Soil Fertility on Rice Yield and Nitrogen Use Efficiency in a Red Paddy Soil

WeiFu PENG, WeiSheng LÜ, Shan HUANG, YongJun ZENG, XiaoHua PAN, QingHua SHI

表1 不同肥力红壤性水稻土的基本理化性质

Table 1 The basic physiochemical properties of the selected red paddy soils with different fertility

土壤肥力 Soil fertility pH 有机质 Organic matter (g·kg-1) 总氮 Total N (g·kg-1) 碱解氮 Alkaline N (mg·kg-1) 速效钾 Available K (mg·kg-1) 速效磷 Olsen P (mg·kg-1) 砂粒 Sand (2-0.02 mm, %) 粉粒 Silt (0.02-0.002 mm, %） 黏粒 Clay (<0.002 mm, %) 低肥力Low fertility 5.48 19.9 1.2 137.2 174.7 17.9 22 56 22 中肥力Medium fertility 5.39 29.6 1.8 191.5 170.5 21.2 23 55 22 高肥力High fertility 5.31 38.9 2.3 241.4 239.6 22.4 22 54 24