基于“3414”模型对川中丘陵区玉米氮磷钾效应的研究
在川中丘陵区具有代表性的土壤类型上进行了玉米“3414”试验,结果表明:施肥增产效应显著,其中,处理6产量最高,处理2产量最低,分别较不施肥处理增产106.0%和18.6%。基础地力对产量的贡献率为48.55%,表明土壤属于下等肥力。N、P、K对玉米产量贡献大小顺序为N〉P〉K,增产效果居首位的为氮肥,施用纯N240kg/hm^2的增产效应达到2826.00ks/hm^2;P肥的增产幅度次之,施用纯P72ks/hm^2的增产效应达到2542.50kg/hm^2;施用纯K45ks/hm^2的增产效应为1207.50ks/hm^2。在不同肥料的交互作用中,N×P的交互作用对产量影响最大,N×P〉N...
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Published in | 西南农业学报 Vol. 25; no. 6; pp. 2132 - 2137 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
四川省农业科学院土壤肥料研究所,四川成都,610066%四川省三台县农业局,四川三台,621100
2012
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Subjects | |
Online Access | Get full text |
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Summary: | 在川中丘陵区具有代表性的土壤类型上进行了玉米“3414”试验,结果表明:施肥增产效应显著,其中,处理6产量最高,处理2产量最低,分别较不施肥处理增产106.0%和18.6%。基础地力对产量的贡献率为48.55%,表明土壤属于下等肥力。N、P、K对玉米产量贡献大小顺序为N〉P〉K,增产效果居首位的为氮肥,施用纯N240kg/hm^2的增产效应达到2826.00ks/hm^2;P肥的增产幅度次之,施用纯P72ks/hm^2的增产效应达到2542.50kg/hm^2;施用纯K45ks/hm^2的增产效应为1207.50ks/hm^2。在不同肥料的交互作用中,N×P的交互作用对产量影响最大,N×P〉N×K〉P×K。施氮量(N)为329.33ks/hm^2,施磷量(P205)为99.04kg/hm^2,施钾量(K20)为50.21kg/hm^2时,玉米产量最高,为6885.94ks/hm^2。玉米产量与N、P、K肥料效应回归模型为三元二次多项式回归模型,经显著性检验达到极显著水平,可以为玉米生产施肥提供借鉴。 |
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Bibliography: | 51-1213/S Maize; Fertilizer effect; Soil testing and fertilizer recommendation; Optimum amount of fertilization In this study, '3414' experiment of maize was conducted in a representative soil type to study the effects of nitrogen (N), phosphorus (P) and potassium (K) on maize yield in hilly regions of middle Sichuan. The result showed that the effects of fertilization were significant. There was the highest yield with treatment 6, while the lowest yield with treatment 2, compared with none fertilizer treatment, the yield increase rate of them was 106.0 % and 18.6 %, respectively. The contribution rate of soil fertility was 48.55 %, which explained that the soil fertility was lower. The influence of N, P and K on maize yield was in order of N 〉 P 〉 K. Nitrogen was the most significant effect on yield, and the yield increase amount of pure nitrogen 240 kg/hm^2 reached 2826.00 kg/hm^2 , the yield increase amount of pure phosphorus (P205) 72 kg/hm^2 reached 2542.50 kg/hm^2 while that of pure potassium (K20) 45 kg/ |
ISSN: | 1001-4829 |