摘要:
以福建闽侯典型冷浸田为例, 通过田间试验, 研究不同地形发育的冷浸田与非冷浸田水稻施肥响应特性及其差异。结果表明, 施肥处理的山垅冷浸田、山垅黄泥田、平洋冷浸田、平洋灰泥田水稻籽粒产量分别比不施肥处理提高76.5%、57.6%、59.0%、43.5%, 增产均达显著差异水平。冷浸田的基础地力贡献率比相应的非冷浸田低6.87.0个百分点, 但施肥农学效率比相应的非冷浸田每千克肥料提高0.13.2kg籽粒产量。冷浸田施肥产量增幅较相应的非冷浸田提高15.518.9个百分点。不论施肥与否, 冷浸田水稻籽粒养分总体高于相应的非冷浸田, 但淀粉含量低于相应的非冷浸田。冷浸田基础地力贡献率低于非冷浸田, 但施肥增产效应明显高于非冷浸田, 其改造增产潜力较大。山垅冷浸田的施肥敏感性要高于平洋冷浸田。
Abstract:
Field tests were conducted on the typical cold-waterlogged paddy fields (CWPF) developed from different landforms in Minhou, Fujian to study the effect of fertilization on rice productivity, as well as the differences among the paddy fields.The results showed that the rice yield increased with fertilization by 76.5%for the CWPF in the mountain ridge area, 57.6% for the yellow paddy field in the mountain ridge area, 59.0% for CWPF in the flat paddy area, and 43.5% for the grey paddy field in the flat area, as compared to the control.The rate of contribution to the productivity by the soil in CWPF was 6.8-7.0percentage points lower than that of the noncold-waterlogged paddy fields (NCWPF) .But the fertilizer agronomy efficiency of CWPF was 0.1-3.2kg grain per kg fertilizer higher than that of the NCWPF.The grain yield increase due to fertilization of CWPF was 15.5-18.9percentage points higher than that of NCWPF.With or without fertilization, the nutritional content of the grains harvested from CWPF was higher than that of NCWPF.The contribution rate of CWPF soil was lower than that of the soils from NCWPF.However, the effect of fertilization was significantly greater on CWPF than NCWPF.And, fertilization was more likely to increase the production on CWPF than NCWPF.The sensitivity of CWPF in the mountain ridge area to the fertilization was better than that of NCWPF in the flat paddy area.
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